VSG & VSSG Single Screw Compressor Unit The World’s Best Compressors For Gas Compression TM 1
Important Message READ CAREFULLY BEFORE INSTALLING AND STARTING YOUR COMPRESSOR. The following instructions have been prepared to assist in installation, operation and removal of Vilter Single Screw Compressors. Following these instructions will result in a long life of the compressor with satisfactory operation. The entire manual should be reviewed before attempting to install, operate, service or repair the compressor. A compressor is a positive displacement machine. It is designed to compress gas.
Table of Contents Important Message............................................................................................. 3 VSG STANDARD VILTER WARRANTY STATEMENT................................................. 6 Long Term Storage Requirements........................................................................ 7 Description.......................................................................................................... 9 Foundation........................................................
VSG STANDARD VILTER WARRANTY STATEMENT Seller warrants all new single screw gas compression units and bareshaft single screw compressors manufactured by it and supplied to Buyer to be free from defects in materials and workmanship for a period of (a) eighteen (18) months from the date of shipment or (b) twelve (12) months from the date of installation at the end user’s location, whichever occurs first.
Long Term Storage Requirements The procedure described is a general recommendation for long term storage (over one month of no operation) of Vilter Manufacturing packages and compressors. While this procedure is intended to cover most of the commonly encountered situations, it is the responsibility of the installation firm and end user to address any unusual conditions. We suggest using the accompanying Long Term Storage Log sheet for recording purposes to validate the appropriate procedures.
Long Term Storage Requirements 2) Cover the unit completely to exclude dirt, dust, moisture, and other foreign materials. 3) If the motor can be moved, it is suggested that the entire motor be encased in a strong, transparent plastic bag. Before sealing this bag, a moisture indicator should be attached to the side of the motor and several bags of silica-gel desiccant put inside the bag, around the motor.
Description COMPRESSOR The Vilter Single Screw Compressor is a positive displacement, capacity and volume controlled, oil flooded, rotary compressor which uses a single main screw intermeshed by two opposing gate rotors. Gas compression occurs when the individual fingers of each gate rotor sweep through the grooves, or flutes, of the main screw as the screw rotates.
Description The Vilter compressors feature the exclusive Parallex™ Slide System, which consists of a pair of slides for each gate rotor assembly. These two independently operated slides are referred to as the capacity slide and the volume ratio slide. On the suction end of the screw, the capacity slide moves to vary the timing of the beginning of the compression process.
Foundation • • • • • • • • • • • The foundation must adequately support the weight of the compressor package, including vessels, oil coolers, controllers, and all ancillary equipment. (See documentation for weight and dimension specifications A detailed general arrangement drawing is provided with all packages. This drawing details foundation type, mounting foot locations, grouting, and anchoring methods for the specific package. Vilter Mfg.
Rigging and Lifting Thank you for purchasing a gas compressor (the “Compressor”) from Vilter Manufacturing LLC (“Vilter”). Rigging and Lifting a large piece of equipment like the Compressor is extremely dangerous. **DISCLAIMER** Notice This rigging and lifting manual (this “Manual”) is provided to you as a courtesy by Vilter and is not intended to be a comprehensive guide to rigging and lifting the Compressor.
Rigging and Lifting Training curriculum for Participants, at a minimum, should include: • • • • • • • A review of safe operating practices; A review of who each person is and their specific role in the lift; A tutorial on how to read lift charts; A demonstration on how to use and inspect rigging hardware; A review of the company’s general lift plans and procedures; A tutorial on hand signals normally used to communicate with crane operators (a copy of such hand signals may be obtained from machine safety
Rigging and Lifting • • • • Get third-party confirmation that the crane owner and the crane operator are in compliance with applicable laws, regulations and internal safety standards; Consult with the crane owner to determine if any site preparation is required for outriggers—improper use of outriggers is a significant cause of crane failure; Determine the level of supervision to be supplied by the crane owner; and Review all crane maintenance and inspection records, including without limitation, the cran
Rigging and Lifting • If the Compressor is not balanced, lower and adjust as necessary. CONTACT VILTER While Vilter will not offer any specific feedback on the Plan or provide a specific Plan for rigging and lifting the Compressor, Vilter may be able to answer questions about the Compressor that are important in developing your Plan. Please contact Vilter at: P.O. Box 8904 5555 S Packard Ave Cudahy, WI 53110-8904 Telephone: 1-414-744-0111 Fax: 1-414-744-3483 email: info.vilter@emerson.com www.vilter.
Installation DELIVERY INSPECTION Vilter screw compressor components are thoroughly inspected at the factory. However, damage can occur in shipment. For this reason, the units should be thoroughly inspected upon arrival. Any damage noted should be reported immediately to the transportation company. This way, an authorized agent can examine the unit, determine the extent of damage and take necessary steps to rectify the claim with no serious or costly delays.
Installation TABLE 2. OIL CHARGE Oil Sep Size 16” 20” 20” 30” 20” 24” 30” 36” 42” Approximate Oil Charge – Gal. 20 to 27 22 to 31 20 to 25 30 to 35 30 to 40 40 to 50 60 to 75 95 to 105 145 to 165 The oil level may be above the top sight glass at this time. Electrically forcing on the oil pump will aid in pre-lubing the various oil lines,oil filter, and other items in the oil circuit before starting the unit.
Installation NOTE: If the hub position on the shaft does not allow enough room to install the short bolts in the hub after hub mounting, install the bolts and disc pack before mounting hub on shaft. B. Straight Bore: 1. Install key(s) in the shaft. If the hub is an interference fit, heat the hub in an oil bath or oven until bore is sufficiently larger than the shaft. 350º F. is usually sufficient. An open flame is not recommended.
Installation This means there is a minimal amount of waviness in the disc pack when viewed from the side. This will result in a flexing element that is centered and parallel to its mating flange faces. Move the connected equipment to accomplish the above. Note: Alignment of C-Flange Units should be checked when compressor or motor are replaced. NOTE: The disc pack is designed to an optimal thickness and is not to be used for axial adjustments.
Installation with the hole in the disc pack, slide one long bolt through washer or link, disc pack, center ring, disc pack, washer or link, and then secure with a locknut. The long bolt requires a minimum clearance “R” for installation between back side of coupling flange and stationary equipment. See Figure 1 and Table l for value of “R.” On size 226 and larger a link must be put on the bolt first. Now install the rest of the long bolts in the same manner. 5. Torque the long bolt locknuts at this time.
Installation & Calibration Slide Valve Actuators Slide Valve Actuator Installations Instructions 3. Caution WHEN INSTALLING THE OPTICAL SLIDE MOTOR, LOOSEN LOCKING COLLAR BEFORE SLIDING THE COLLAR DOWN ON THE SHAFT. DO NOT USE A SCREWDRIVER TO PRY LOCKING COLLAR INTO POSITION. OVERVIEW Calibration of an optical slide valve actuator is a two step process that must be done for each actuator installed of the compressor. Briefly, the steps are as follows.
Installation & Calibration Slide Valve Actuators Caution: there are wires attached to the connector on the plastic cover. Handling the cover too aggressively could break the wires. 7. Gently lift the cover and tilt it toward the Turck connectors. Raise the cover enough to be able to press the blue calibrate button and be able to see the red LED on the top of assembly. 8. Press “Menu” on the main screen and then press the “Slide Calibration” button, to enter the slide calibration screen.
Installation & Calibration Slide Valve Actuators 21. Use the INC button to rotate the actuator towards its maximum position while watching the millivolt readout on the controller screen. Discontinue pressing the INC button when the millivolt reading in the “Current” window is approximately 9200 millivolts (7900 millivolts for the 2783J qualified analog boards). You are nearing the mechanical stop position. 22.
Slide Valve Operation Slide Valve Actuator Operation The slide valve actuator is a gear-motor with a position sensor. The motor is powered in the forward and reverse directions from the main computer in the control panel. The position sensor tells the main computer the position of the slide valve. The main computer uses the position and process information to decide where to move the slide valve next. The position sensors works by optically counting motor turns.
Slide Valve Actuator Trouble Shooting Guide Problem The actuator cannot be calibrated Reason Dirt or debris is blocking one or both optocoupler slots Clean the optocoupler slots with a Q-Tip and rubbing alcohol. The photochopper fence extends less than about half way into the optocoupler slots Adjust the photochopper so that the fence extends further into the optocoupler slots.
Slide Valve Actuator Trouble Shooting Guide Problem The actuator does not transmit the correct position after a power loss Reason The motor was manually moved while the position sensor was not powered. The motor brake is not working properly There is a rapid clicking noise when the motor is operating The motor operates in one direction only The motor will not move in either direction The motor runs intermittently, several minutes on, several minutes off 26 Solution Recalibrate.
Slide Valve Actuator Trouble Shooting Guide Problem Reason The motor runs sporadically The motor runs but output shaft will not turn Solution Bad thermal switch Replace the actuator. Any of the reasons listed in “The motor will not move in either direction” See above. Stripped gears inside the gear motor or the armature has come unpressed from the armature shaft Replace the actuator. Slide Valve Actuators communicate problems discovered by internal diagnostics via LED blink codes.
Slide Valve Actuator Trouble Shooting Guide *__________________ This indicates a skipped state in the patterns generated by the optocouplers as the motor moves. This error means that the slide valve actuator is no longer transmitting accurate position information. The actuator should be recalibrated as soon as possible. This code will not clear until the actuator is recalibrated. This code can be caused by: 1.
Operation Section Notice on using Non -Vilter Oils Oil and its additives are crucial in system performance. Vilter Manufacturing will NOT APPROVE non-Vilter oils for use with Vilter compressors. Due to the innumerable choices available it is not possible for us to test all oils offered in the market place, and their effects on our equipment. We realize that customers may choose lubricants other than Vilter branded oil. This is certainly within the customers’ right as owners of the equipment.
Operation OIL SYSTEM A. Oil Charge Charge the oil separator with the proper quantity of lubricating oil (see Table 2 in the Installation Section). CAUTION It is imperative you charge the oil into the receiver/ separator prior to energizing the control panel to prevent burning out the immersion heater in the separator/receiver. During operation, maintain the separator oil level in the normal operating range between the two bullseye sight glasses.
Operation CAUTION When changing filter, discard clogged filter only. Save and reuse spring plate and centering piece. This filter MUST be installed with the spring plate. A compressor that is allowed to operate without the spring plate is running with unfiltered oil. The filter housing can be evacuated and then slowly pressurized to check for leaks before returning to service. C.
Operation by ensuring that the ball is in the closed position and that the actuator indicator displays CLOSED. 3.2 When the electrical power to the valve is energized, the valve should rotate to fully OPEN. 4. Operation 4.1 When initially installed, the ball must be in the closed position. 4.2 When electrically energized, if the compressor is not running, the compressor controller will turn the valve fully open (100%). 6.1 100% OPEN oil flow stream is entirely bypassing the oil cooler 6.
Operation NOTE: The ball valve and the actuator must always be assembled in the CLOSED position. See Section 3. Calibration above. CAUTION: Be careful not to move the ball stem during this operation. Turning the ball valve 90° in either direction will reverse the control action of the valve and the compressor will experience high oil temperature within minutes. Turning the ball valve 180° has no detrimental effect. 9.
Operation When viewing the compressor from the discharge end (opposite the drive end), the upper motor is for capacity control. The command shaft turns (see Table 1) to decrease the capacity to 10% and reverses to increase the capacity to 100%. The lower motor is for volume ratio control. The command shaft turns (see Table 1) to reduce the volume ratio to 2.0, and reverses to increase the volume ratio to 5.0. 2.
Operation 4. Oil Filter Differential The Motor Amps Load Limit protects the compressor from overloading by decreasing the compressor capacity if the motor amperage is at the Maximum Amps setpoint, or preventing an increase in capacity if the motor amperage is above the Full Load Amps setpoint. (See Compact Logix PLC manual, p/n 35391CL.) 3.
Operation 6. Manually open the stop valve on the oil bleed return line from the element section and open the expansion valve 1/2 of a turn. See Figure 7. FIGURE 7. OIL SEPARATOR BLEED LINE NOTE: The purpose of the oil bleed return assembly is to collect any oil that passes through the oil separating element and returns that oil to the compressor. The hand expansion valve should be adjusted to prevent an oil level from forming in the sight glass when the compressor is at 100% capacity.
Pre Start-Up Checklist The following Check List is to help prepare the equipment before the Vilter Technician arrives at the jobsite. Vilter recommends that a Trained Technician go through the following tasks. The operating Manuals provided by Vilter, can be referenced for any type of questions or special instructions. Every Gas Compression unit includes a Vilter Start-Up (Confirm on PO). The following tasks are not included in the Vilter Start-up provided in your equipment purchase.
Pre Start-Up Checklist 11. The center member of the compressor is shipped loose to help facilitate final field alignment and allow for motor rotation check. The motor alignment should be within 0.004” total indicator reading in all directions 12. Both the compressor and motor hubs should be checked for concentricity and perpendicularity. 13. The motor should be checked and shimmed for a soft foot prior to attempting final alignment. 14.
Inspect Compressor Bearings Key: Transducers RTD's Coalescing Elements Suction Screen Coupling Alignment and Integrity Oil Change Oil Analysis (1) Oil Filters Oil Strainer 200 (I) Inspect. I I I I I I I I I R I 5,000 R S R I I I I I I R S R I I I I I I I I I R S R I 40,000 R I S R I 50,000 (S) I I I I S R I 60,000 Sample. I I I I R I R S R I 70,000 I I I I S R I I I I I I R S R I 80,000 BASED ON DRY CLEAN GAS 30,000 (R) Replace.
Service GENERAL COMMENTS When working on the compressor, care must be taken to ensure that contaminants (i.e. water from melting ice, dirt and dust) do not enter the compressor while it is being serviced. It is essential that all dust, oil or ice that has accumulated on the outside of the compressor be removed before servicing the compressor. When servicing the compressor, all gaskets, O-rings, roll pins and lock washers must be replaced when reassembling the compressor.
Service INSTALLATION OF THE COMPRESSOR A) After the work has been completed, reinstall the compressor on the base or C-flange adapter (dependent upon compressor model). B) On the VSG units, replace the shims under the compressor feet. Check for a soft foot. This is accomplished by tightening down three of the hold down bolts and checking the clearance under the fourth compressor foot. If there is clearance, add the appropriate amount of shims.
Service Top View Rotor Being Pushed By Use Of Lever Direction of rotor movement. Axial force at coupling to be 300-500lbs. Rigidly attach dial indicator. Position it on the axis of the compressor. Force to be determined by length of level arm. COMPRESSOR INSPECTION The Vilter Single Screw Compressor is designed for long periods of trouble free operation with a minimum of maintenance. However, a yearly inspection is recommended so any irregular wear is noted and rectified.
Service 4) Add both readings, the total indicator movement is the bearing float and this should not exceed 0.003”. C) Gate rotor bearing float. 1) Remove the side covers and position a dial indicator on the gate rotor. 2) Use a lever arm pivoting on a bolt with a small block of wood against the gate rotor blade to protect the blade. 3) The maximum amount of bearing float should not exceed 0.002”. TABLE 2.
Service GATE ROTOR ASSEMBLY CAUTION Gate rotor removal and assembly is divided into distinct instructions, instructions for all VSG and VSSG models and different instructions for all VSM models. Please follow the appropriate set of instructions. For VSG 451 thru 601 compressors, do not use side rails. REMOVAL ( All VSG) 90 1A For VSSG 751/901 & VSG 1051/1201 compressors, use side rails and assemble to gaterotor stablizer as stamped. 90 1B 90 1C A) Prepare the compressor for servicing.
Service E) Remove the hex head and socket head bolts from the thrust bearing cover. Insert two of the bolts into the threaded jacking holes to assist in removing the cover. Retain the shim pack and keep it with the bearing housing cover. F) Hold the gate rotor support with a suitable wrench on the flats provided near the roller bearing housing. Remove the inner retainer bolts and the retainer.
Service REMOVAL (ALL VSG 301-701 MODELS) The removal of the gate rotor assembly for the VSG 301-701 compressors is similar for the VSG 9012101 compressors. The inner races are secured to the stationary bearing spindle. A) Prepare the compressor for servicing. B) Remove the upper bolt from the side cover and install a guide stud in the hole. Remove the remaining bolts and side cover. There will be some oil drainage when the cover is removed.
Service E) Remove plug on the thrust bearing housing. Loosen the socket head cap screw that is located underneath the plug. This secures the inner races of the thrust bearings to the spindle. F) Remove bolts that hold the thrust bearing housing to the compressor. Insert two of the bolts into the threaded jacking holes to assist in removing the bearing housing from the compressor. When the housing is removed, there will be shims between the spindle and thrust bearings.
Service INSTALLATION (All VSG Models) A) Install the gate rotor support by carefully tilting the roller bearing end of the gate rotor support towards the suction end of the compressor. The compressor input shaft may have to be rotated to facilitate the installation of the gate rotor support. Install gate rotor stabilizer. The gate rotor stabilizer (901) will hold the gate rotor support in place as the thrust bearing housing is being installed.
Service D) Set the clearance between the gate rotor blade and the shelf. 1. Place a piece of 0.003”-0.004” shim stock between the gate rotor blade and the shelf. 2. Measure the depth from the top of the compressor case to the top of the thrust bearing housing. This determines the amount of shims needed for the correct clearance. 3. Use factory installed shim pack (106) and bearing housing cover (116) without the Oring (143).
Service INSTALLATION (All VSG 301-701 Models) A) Install the gate rotor support. Carefully tilt the roller bearing end of the gate rotor support towards the suction end of the compressor. The compressor input shaft may have to be rotated to facilitate the installation of the gate rotor support. B) Install the roller bearing housing with a new O-ring. Tighten the bolts to the recommended torque value.
Service GATE ROTOR BLADE REMOVAL A) Remove the gate rotor assembly. B) Remove the snap ring and washer from the gate rotor assembly. Lift gate rotor blade assembly off the gate rotor support. C) Check damper pin and bushing for excessive wear. Replace if necessary. TOP of assembly Relief area faces TOP of assembly.
Service GATE ROTOR BLADE INSTALLATION (with Relief) A) Install damper pin bushing (120) in gate rotor blade (111) from the back side of the blade. Be sure the bushing is fully seated. B) Place the blade assembly on the gate rotor support. Locating Damper over pin. C) Install washer (119) and snap ring (130) on gate rotor assembly. The bevel on the snap ring must face away from the gate rotor blade.
Service GATE ROTOR THRUST BEARING INSTALLATION A) For installation of thrust bearings on VSG and VSSG units: 1) Install bearings (126) in the housing so the bearings are face to face. The larger sides of the inner races are placed together. A light application of clean compressor lubricating oil should be used to ease the installation of the bearings into the housing. 2) Center the bearing retainer ring on housing, use Loctite® 242-thread locker and evenly tighten the bolts to the recommended torque value.
Service GATE ROTOR ROLLER BEARING REMOVAL A) Refer to section REMOVAL ( All VSG) for removal of the gate rotor bearing housings and gate rotor supports. B) Remove the snap ring (131), which retains the roller bearing in the bearing housing. C) Remove the roller bearing (125) from the bearing housing (112). D) Use a bearing puller to remove the roller bearing race (125) from the gate rotor support (110).
Service COMPRESSOR SHAFT SEAL REPLACEMENT Seal with stationary mirror face (219B) and rotating carbon face (219C). Seal with stationary carbon face (219B) and rotating mirror face (219C). COMPRESSOR SHAFT SEAL REMOVAL Current Shaft Seal and for all Replacement. A) Prepare the compressor for servicing as outlined in section REMOVAL ( All VSG) . B) Remove bolts (281) holding the shaft seal cover (218). Insert two of the bolts into the threaded jacking holes to assist in removing the cover.
Service COMPRESSOR SEAL INSTALLATION NOTE: When replacing the stationary members of the seal on the VSSG 291 thru VSSG 601 the roll pin in the cover is used only with the seal assembly having a stationary mirror face. If a seal assembly with a stationary carbon face is installed, the roll pin must be removed. A) Install new oil seal in cover. CAUTION Care must be taken when handling the shaft seal and mirror face so it is not damaged.
Service shoulder on the input shaft. Make sure the seal is seated against the shoulder. If the seal is not fully seated against the shoulder, the shaft seal carbon will be damaged when the seal cover is installed. Maintenance Suggestion: A spray bottle filled with clean compressor oil may be used to lubricate the faces of the seals without touching the seal.
Service INSPECTION OF SLIDE VALVE ASSEMBLIES IN THE COMPRESSOR Prepare the compressor for servicing. A) Remove the gate rotor access covers. Using a mirror and flashlight, visually inspect the slide valve carriage through the gas bypass opening. Look for any significant signs of wear on the slide valve carriage. B) To check the clearance of the slide valve clamps, the gate rotor support must be removed. Refer to removal of the gate rotor support.
Service D) Locate and remove the socket head plugs above the slide valve carriage attachment bolts. Remove the bolts located under the plugs. E) The slide valve carriage may now be removed. On newer carriages there is a threaded hole in the back of the slide valve carriage to aid in its removal. Use a threaded tip slide hammer to aid in the removal of the carriage. Note: Slide Valves may be re-positioned to aid in removal of assembly.
Service COMMAND SHAFT ASSEMBLY REMOVAL The following steps can be used to remove or install either the capacity or volume command shaft assemblies. A) Prepare the compressor for servicing. B) Follow the appropriate instructions to remove control actuator. . C) Remove four socket head cap screws (457) and Nord-Lock washers (477) securing mounting plate (415) to manifold. D) The command shaft and mounting plate may now be removed from the compressor.
Service C) The command shaft bearing (435) is a press fit on the command shaft (413). Remove the command shaft bearing with a suitable press. Ven t ho le. 436 445 Reference “Parts Section” for current Housing D) Remove the O-ring seal (445) from the command shaft housing. The command shaft bushing (433 and 436) might have to be removed to gain access to o-rings. Replace bushing if the bore is deeply scored or excessively worn.
Service DISCHARGE MANIFOLD INSTALLATION A) Install (2) guide rods to position the discharge manifold. Install a new manifold gasket and the discharge manifold. Install the dowel pins and bolts, tighten manifold bolts to the recommended torque value. B) On VSG 751-2101 and VSSG 291-601 compressors install the discharge spool or elbow between the discharge manifold and oil separator with new gaskets.
Service C) To remove the cross shafts, remove socket head bolts, clamp and spacers from both sides. VSG 751-2101 compressors cross shafts. INSTALLATION OF CAPACITY OR VOLUME CROSS SHAFTS A) To reassemble either set of capacity or volume ratio slide valve racks, install the cross shaft with the pinion gear onto the back plate, place the remaining pinion gear on the shaft and drive in the roll pins. Install clamps, spacers and bolts on both sides. Tighten the bolts to the recommended torque values.
Service TORQUE SPECIFICATIONS (ALL UNITS IN FT.
Service USING A TORQUE WRENCH CORRECTLY TORQUE WRENCHES USING A TORQUE WRENCH CORRECTLY INVOLVES FOUR PRIMARY CONCERNS: A. A smooth even pull to the break point is required. Jerking the wrench can cause the pivot point to break early leaving the bolt at a torque value lower then required. Not stopping when the break point is reached results in an over torque condition. B.
Service A. The Nord-Lock® lock washer sets are used in many areas in both the VSG & VSSG screw compressors that require a vibration proof lock washer. B. The lock washer set is assembled so the course serrations that resemble ramps are mated together. C. Once the lock washer set is tightened down, it takes more force to loosen the bolt that it did to tighten it. This is caused by the washers riding up the opposing ramps.
Parts Section Recommended Spare Parts List Refer to the Custom Manual Spare Parts Section for Specific Applications Please have your Model # and Sales Order # available when ordering. These are found on the compressor’s Name Plate.
Gate Rotor 68
Gate Rotor ITEM DESCRIPTION 102 105 106 110 111 112 113 114 115 116 117 118 119 120A 120B 121 122 123 124 125 126 130 131 135A 135B 141 142 143 150 151 152 153 160 NOTE: GATE ROTOR BLADE AND BEARING REPLACEMENT KIT, 111, 118, 120A, 120B, 121, 122, 123, 124, 125, 126, 130, 131, 141, 142 & 143. GATE ROTOR BLADE REPLACE KIT, 111, 118, 120A, 120B, 121, 122, 123, 124, 130, 141, 142 & 143. GATE ROTOR SUPPORT ASSEMBLY 100, 111, 120B, 119 & 130. GATE ROTOR GASKET SET 118, 141, 142 & 143.
Gate Rotor ITEM DESCRIPTION GATE ROTOR BLADE AND BEARING REPLACEMENT KIT, 111, 118, 120A, 120B, 121, 122, 123, 124, 125, 126, 130,131, 141, 142 & 143. GATE ROTOR BLADE REPLACE KIT, 111, 118, 120A, 120B, 121, 122, 123, 124, 130, 141, 142 & 143. 102 GATE ROTOR SUPPORT ASSEMBLY 100, 111, 120B, 119 &130 105 GATE ROTOR GASKET SET 118, 141, 142 & 143. SHIM PACK SET (2) 121, (2) 122, (1) 123, (1) 124. 110 SUPPORT. 111 GATE ROTOR. 118 GATE ROTOR COVER GASKET. 119 WASHER. 120A BUSHING, SMALL DOWEL PIN.
Gate Rotor ITEM DESCRIPTION VSG 1551 VSG1851 VSG 2101 QTY VPN QTY VPN QTY VPN GATE ROTOR BLADE AND BEARING REPLACEMENT KIT, 111, 118, 120A, 120B, 121, 122, 123, 124, 125, 126, 130, 131, 141, 142 & 143. 2 KT712L 2 KT712M 2 KT712K GATE ROTOR BLADE REPLACEMENT KIT, 111, 118, 120A, 120B, 121, 122, 123, 124, 130, 141, 142 & 143. 2 KT713G 2 KT713H 2 KT713L 101 GATE ROTOR ASSEMBLY 111 & 120. 2 A25160EB 2 A25160EA 2 A25160EA 102 GATE ROTOR SUPPORT ASSEMBLY 100, 111, 120B, 119 &130.
Shaft Seal Shaft Seal With Stationary Carbon Face ITEM DESCRIPTION 230 260 72 SHAFT SEAL VITON KIT, 219, 260, 230 VSSG 291-601 QTY VPN 1 KT709AG OIL SEAL. O-RING.
Tandem Shaft Seal DESCRIPTION TANDEM SHAFT SEAL 2.25” QTY VPN 1 25713A 1 25713B SHAFT DIAMETER 2.5” QTY VPN QTY 1 25713A 1 1 25713B 1 2.
Main Rotor 74
DESCRIPTION 1 A25177B SHIM PACK 1 A25177B 207 VSSG 601 QTY PART# 1 A25168BA VSSG 451 QTY PART# ROTOR ASSY 1 A25168BB (DOES NOT INCLUDE SHIM PACK #207) 201 ITEM MODEL NUMBER A25168CB 1 A25177C 1 1 1 A25177C A25168CA VSG 751 VSG 901 QTY PART# QTY PART# 1 A25177D 1 A25168DB VSG 1051 QTY PART# 1 A25177D 1 A25177E 1 A25168DA 1 A25168EB VSG 1201 VSG 1551 QTY PART# QTY PART# 1 1 A25177E A25168AE VSG 1851 QTY PART# 1 1 A25177E A25225EE VSG 2101 QTY PART#
Slide Valve Cross Shafts and End Plate 76
Slide Valve Cross Shafts and End Plate MODEL NUMBER VSSG 291-601 ITEM DESCRIPTION QTY VPN 221 SHAFT. 2 25843A 222 GEAR. 4 25027A 226 RACK CLAMP. 2 25913A 227 RACK CLAMP. 2 25913B 228 SPACER. 2 25847A 268 EXPANSION PIN. 4 1193D 269 EXPANSION PIN. 4 2981AA 286 SOCKET HEAD CAP SCREW. 8 2795F 297 SET SCREW 2 2060J 298 SET SCREW 2 2060H ITEM DESCRIPTION 220 END PLATE 221 SHAFT. 222 GEAR. 226 RACK CLAMP. 228 SPACER. 267 DOWEL PIN. 268 EXPANSION PIN. 269 EXPANSION PIN.
Capacity Slide Volume Slide Carriage Assembly Slide Valve Carriage Assembly
Slide Valve Carriage Assembly ITEM DESCRIPTION MODEL NUMBERVSSG 291 Thru VSSG 601 QTY 300 CARRIAGE ASSEMBLY. 2 304 CAPACITY PISTON 340, 341, 350 & 355 2 305 VOLUME PISTON 340, 342, 350 & 355 2 307 GASKET SET 345B. 2 316 RACK. 2 323 RACK. 2 343A COVER, SEPARATE VOL. & CAP. 4 343B COVER, ONE PIECE CAST. 2 345A GASKET, SEPARATE VOL. & n/a CAP COVERS. 4 345B GASKET, ONE PIECE CAST COVER. 2 350 PISTON RING SET. 4 355 EXPANSION PIN. 4 359 PIPE PLUG. 6 360 LOCK WASHER (PAIR).
Slide Valve Carriage Assembly ITEM DESCRIPTION 300 CARRIAGE ASSEMBLY. 304 CAPACITY PISTON 340, 341, 350 & 355. 305 VOLUME PISTON 340, 342, 350 & 355. 307 GASKET SET 345B & 378**. 316 RACK. 323 RACK. 340 PISTON. 341 CAPACITY PISTON SHAFT. 342 VOLUME PISTON SHAFT. 343A COVER, SEPARATE VOL. & CAP. 343B COVER, ONE PIECE CAST. 344 COVER, SEPARATE VOL. & CAP. 345A GASKET, SEPARATE VOL. & CAP COVERS. 345B GASKET ONE PIECE CAST COVER. 346 GASKET, SEPARATE VOL. & CAP COVERS. 347 PISTON SLEEVE.
Slide Valve Carriage Assembly ITEM DESCRIPTION 300 CARRIAGE ASSEMBLY. 304 CAPACITY PISTON 340, 341, 350 & 355 305 VOLUME PISTON 340, 342, 350 & 355 307 GASKET SET 345 & 378. 316 RACK. 323 RACK. 325 SHAFT. 340 PISTON. 341 CAPACITY PISTON SHAFT. 342 VOLUME PISTON SHAFT. 343B COVER. 345B GASKET. 347 PISTON SLEEVE. 350 PISTON RING SET. 355 EXPANSION PIN. 359 PIPE PLUG. 360 LOCK WASHER (PAIR). 361 WASHER. 363 NUT. 366B HEX HEAD CAP SCREW. 373 SOCKET HEAD CAP SCREW. 374 LOCK WASHER (PAIR). 378 0-RING.
Actuator & Command Shaft 82
Actuator & Command Shaft ITEM DESCRIPTION MODEL NUMBER VSSG 291 thru VSSG 601 QTY VPN VSG 751 thru VSSG 901 VPN VSG 1051 thru VSG 1201 VPN VSG 1551 thru VSG 2101 VPN 400 401 446 2 2 2 A25994C 25972D 2176X A25994D 25972D 2176X A25994E 25972D 2176X COMMAND SHAFT ASSEMBLY SLIDEVALVE ACUATOR O-RING A25994B 25972D 2176X 83
Miscellaneous Frame Components VSG Screw Compressor 84
Miscellaneous Frame Components MODEL NUMBER ITEM DESCRIPTION GASKET AND O-RING KIT; 504 FLANGE SET 513, 514 & 547A. VSSG 291 thru VSSG 601 QTY VPN 1 KT710A1 1 A25190A 506 ECON-O-MIZER PORT. 2 A25190B 512 513 513 514 514A 518 519 524 525 527 528 530 532 535 539 540 545 MANIFOLD GASKET. FLANGE OIL. AFLANGE ECON-O-MIZER. FLANGE GASKET OIL. FLANGE GASKET ECON‑O‑MIZER. SUCTION FLANGE GASKET. DISCHARGE FLANGE GASKET. COVER. GASKET. INLET SCREEN. ECON-O-MIZER PLUG.
Miscellaneous Frame Components MODEL NUMBER ITEM DESCRIPTION VSG 751 VSG 901 QTY VPN QTY VPN GASKET AND O-RING KIT; 1 KT710B 1 KT710B 504 FLANGE SET 513, 514 & 547. 1 A25190A 1 A25190A 512 MANIFOLD GASKET. 1 25541A 1 25541A 513 FLANGE OIL. 1 25058A 1 25058A 514 FLANGE GASKET OIL. 1 11323D 1 11323D 518 SUCTION FLANGE GASKET. 1 25199C 1 25199C 519 DISCHARGE FLANGE GASKET. 1 25199B 1 25199B 526 ORIFICE PLATE. 1 25223CB 1 25223CA 529 WAVE SPRING.
Miscellaneous Frame Components MODEL NUMBER ITEM DESCRIPTION VSG 1551 THRU VSG 2101 QTY VPN GASKET AND O-RING KIT; 1 KT710D 504 FLANGE SET 513, 514 & 547. 1 A25190C 504 FLANGE SET 513A, 514A & 547 ECON-O-MIZER PORT. 2 A25190D 512 MANIFOLD GASKET. 1 25676A 513 FLANGE OIL. 1 12477C 513A FLANGE ECON-O-MIZER. 514 FLANGE GASKET OIL. 1 11323F 514A FLANGE GASKET ECON-O-MIZER. 518 SUCTION FLANGE GASKET. 1 25199D 519 DISCHARGE FLANGE GASKET. 1 25199C 530 O-RING 2 2176J 538 PIPE PLUG 3/4” MPT.
1551 291 Replacement Tools
Replacement Tools MODEL NUMBER ITEM DESCRIPTION 900 GATEROTOR TOOLS (901, 910, 911, 912, 913, 914, 915, 916 & 917). 901 GATEROTOR STABILIZER SET (901A, 901B & 901C). VSSG 291 thru VSSG 601 QTY VPN ITEM DESCRIPTION 900 GATEROTOR TOOLS (901, 910, 911, 912, 913, 914, 915, 916 & 917). 901 GATEROTOR STABILIZER SET (901A, 901B & 901C).
Replacement Tools ITEM DESCRIPTION 900 GATEROTOR TOOLS (901, 910, 911, 912, 913, 914, 915, 916 & 917). 901 GATEROTOR STABILIZER SET (901A, 901B, 901C & 901D).
VSG 301-701 Replacement Parts Section Recommended Spare Parts List Refer to the Custom Manual Spare Parts Section for Specific Applications Please have your Model # and Sales Order # available when ordering. These are found on the compressor’s Name Plate.
Gaterotor Assembly 92
Gaterotor Assembly Part totals indicated are for one gate rotor assembly, machines with two gate rotors will require double the components listed below. ITEM DESCRIPTION 100 SUPPORT ASSEMBLY 110 & 135B. 101 GATE ROTOR & DAMPER ASSEMBLY 111,120. 102 GATE ROTOR SUPPORT ASSEMBLY 100, 101, 119 & 130. SHIM PACK SET (2) 121, (2) 122, (1) 123, (1) 124. 110 SUPPORT. 111 GATE ROTOR. 114 SNAP RING. 115 RETAINER BALL BEARING 118 GATE ROTOR COVER GASKET. 119 WASHER WAVE SPRING. 120 DAMPER. 121* SHIM 0.002”.
Gaterotor Assembly Part totals indicated are for one gate rotor assembly, dual gate machines will require double the components. ITEM DESCRIPTION 100 SUPPORT ASSEMBLY 110 & 135B. 101 GATE ROTOR & DAMPER ASSEMBLY 111,120. 102 GATE ROTOR SUPPORT ASSEMBLY 100, 101, 119 & 130. SHIM PACK SET (2) 121, (2) 122, (1) 123, (1) 124. 110 SUPPORT. 111 GATE ROTOR. 114 SNAP RING. 115 RETAINER BALL BEARING 118 GATE ROTOR COVER GASKET. 119 WASHER. 120 DAMPER. 121* SHIM 0.002”. 122* SHIM 0.003”. 123* SHIM 0.005”.
Shaft Seal MODEL NUMBER ITEM DESCRIPTION ALL VSG 301-401 ALL VSG 501-701 QTY VPN QTY VPN * SHAFT SEAL KIT Viton Kit 219, 230, & 260. 219 230 244252260 261 SHAFT SEAL. 1 OIL SEAL. 1 TEFLON SEAL 1 RETAINER RING 1 O-RING 1 O-RING. (205 Only) 1 NOTE * A - 1 KT709DG 1 KT709AG A 1 A 2930C 1 25040A 25939A 1 25939A 2928M 1 2928M 2176U 1 2176F 2176AE n/a Not pictured. Sold only as kit. See recommended spare parts lists for complete assembly.
Main Rotor, Slide Valve Cross Shafts & End Plate Models VSG301-401 Counter Clockwise ONLY 96
Main Rotor, Slide Valve Cross Shafts & End Plate Models VSG301-401 Counter Clockwise ONLY ITEM DESCRIPTION 201 MAIN ROTOR ASSEMBLY. 203 OIL BAFFLE ASSEMBLY (1) 217, (1) 244, (1) 248, (1) 249, (1) 252. SHIM ASSORTMENT (2) 240, (2) 241, (1) 242, (1) 243 217 OIL BAFFLE PLATE . 220 END PLATE. 221 SHAFT. 222 GEAR. 227 CLAMP. 228 SPACER. 240 SHIM 0.002” 241 SHIM 0.003” 242 SHIM 0.005” 243 SHIM 0.010” 244 TEFLON RING. 248 CHECK VALVE. 249 CHECK VALVE. 252 RETAINING RING 268 EXPANSION PIN. 269 EXPANSION PIN.
Main Rotor, Slide Valve Cross Shafts & End Plate Models VSG501-701 Clockwise ONLY 98
Main Rotor, Slide Valve Cross Shafts & End Plate Models VSG501-701 Clockwise ONLY ITEM DESCRIPTION 201 MAIN ROTOR ASSEMBLY. 203 OIL BAFFLE ASSEMBLY (1) 217, (1) 244, (1) 248, (1) 249, (1) 252. SHIM ASSORTMENT (2) 240, (2) 241, (1) 242, (1) 243 220 END PLATE. 221 SHAFT. 222 GEAR. 228 SPACER. 240 SHIM 0.002” 241 SHIM 0.003” 242 SHIM 0.005” 243 SHIM 0.010” 244 TEFLON RING. 248 CHECK VALVE. 249 CHECK VALVE. 252 RETAINING RING 255 WASHER 256 WASHER 268 EXPANSION PIN. 269 EXPANSION PIN.
Assembly Includes Carriage and Slides.
Slide Valve Carriage Assembly MODEL NUMBER ITEM DESCRIPTION ALL VSG 301-401 QTY VPN 300 CARRIAGE ASSEMBLY. 1 A25179A 304 CAPACITY PISTON 340, 341, 350 & 355. 1 A25183A 305 VOLUME PISTON 340, 342, 350 & 355. 1 A25184A 316 CAPACITY RACK. 1 25023D 318 CAPACITY RACK SHAFT. 1 25772C 323 VOLUME RATIO RACK. 1 25023C 325 VOLUME RATIO RACK SHAFT. 1 25772D 350 PISTON RING SET. 2 2953AE 360 LOCK WASHER (PAIR). 2 3004C 361 WASHER. 2 13265B 363 NUT. 4 2797A 372* SOCKET HEAD CAP SCREW.
Actuator & Command Shaft 102
Actuator & Command Shaft ITEM DESCRIPTION MODEL NUMBER VSSG 291 thru VSSG 601 QTY VPN VSG 751 thru VSSG 901 VPN VSG 1051 thru VSG 1201 VPN VSG 1551 thru VSG 2101 VPN 400 401 446 2 2 2 A25994C 25972D 2176X A25994D 25972D 2176X A25994E 25972D 2176X COMMAND SHAFT ASSEMBLY SLIDEVALVE ACUATOR O-RING A25994B 25972D 2176X 103
Miscellaneous Frame Components Model VSG 301-401 Model VSG 501-701 104
Miscellaneous Frame Components ITEM DESCRIPTION 512 MANIFOLD GASKET 514 ECON-O-MIZER GASKET 522 COUPLING LOCK PLATE 523 LOCK WASHER 528 ECON-O-MIZER PLUG 530 O-RING 540 DOWEL PIN 542 PIPE PLUG 551 HEX HEAD CAP SCREW 570 BEARING OIL PLUG 571 PLUG 572 SPRING Notes*.
Housing Accessories Miscellaneous Frame Components 106
Miscellaneous Frame Components Housing Accessories ITEM DESCRIPTION 117 GATE ROTOR COVER. 118 COVER GASKET. 129 GASKET. 180 INLET SCREEN. 343 PISTON COVER. * MODEL NUMBER VSG 301 - 701 QTY VPN 1 25416B 2 25259B 1 11323T 1 25920A 1 25724B ITEM DESCRIPTION MODEL NUMBER VSG 301 - 401 VSG 501 - 701 QTY VPN QTY VPN 345 346 4 2 O-RING. O-RING.
Replacement Tools ITEM DESCRIPTION 901 GATEROTOR STABILIZER.
Pre Start Up for Proper Oil Separator Level and to Prime the Cooler WARNING Shows the Flow for Priming the Oil Cooler (Steps 1-5) Shows the Flow for Priming the Compressor Prior to Start Up (Steps 6-11) Failure to Follow These Steps Will Result in Bearing Damage and Compressor Seizing and Will Void Any and All Warranties That May Apply.
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EmersonClimate.com Vilter Manufacturing LLC P.O. Box 8904 Cudahy, WI. 53110-8904 P: 414-744-0111 F: 414-744-1769 www.vilter.com 110 (6/2011) Emerson and Vilter are trademarks of Emerson Electric Co. or one of its affi liated companies. ©2011 Emerson Climate Technoligies, Inc. All rights reserved. Printed in the USA. 35391SSG Rev.
