VSG & VSSG Single Screw Bare Shaft Compressor 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 Critical Applications Guidelines............................................................................ 8 Instrumentation Requirements..............................................
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 Note: At the time of purchase Vilter Manufacturing must be notified. 1. The compressor(s) must be stored in a heated building, preferably air conditioned to control moisture, to prevent corrosion of the main rotor shaft and for the compressor. The slide valve (volume ratio& capacity) motors and gears. 2. The main rotor shaft must be coated with light grease to prevent rusting. 3.
Critical Applications Guidelines To ensure the successful operation of the VSG compressor, the guidelines described below should be followed. 1. Proper lubrication is critical to the operation of the VSG compressor. The compressor relies on the injected oil to absorb and remove the heat of compression, to seal the compression chambers formed in the flutes of the screw, and to lubricate all moving parts.
Instrumentation Requirements Pressure Temperature There are four pressure transducers required to read system pressures as listed below. There are four temperature readings required for processor control, as listed below. 1. Suction pressure transducer (-15.0 - 300 PSIG) measures the gas suction pressure into the compressor housing, which provides the permissive to start for minimum suction pressure, and is used for annunciation of low suction pressure while running and in the capacity control logic.
Instrumentation Requirements MOTOR COMPRESSOR OIL SEPARATOR STANDARD SINGLE OIL FILTER OPTIONAL DUAL OIL FILTERS OIL COOLER STANDARD WATER COOLED OIL COOLER OPTIONAL REMOTE AIR COOLED OIL COOLER Miscellaneous: Additional instrumentation devices required are a current transformer mounted around one phase of the drive motor leads to measure main motor amperage, and two rotary potentiometers to read the position of the slides.
Alarm and Shutdown Readings The control system for the VSG compressor must protect the machine from damage caused by running outside of normal operating conditions by providing operators with alarms when operating parameters have reached an abnormal condition, and by automatically stopping the compressor before these conditions can cause a unit failure.
VSG Package Requirements Process Gas Circuit 1. Suction Gas Stop/Check Valve - The VSG compressor requires a manually operated stop valve on the suction line to the compressor to allow for isolating the compressor package from process gas. Also, a check valve is required in the suction line to limit reverse rotation of the compressor on shutdown. 2.
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 teeth of each gate rotor sweep through the grooves, or flutes, of the main screw as the screw rotates.
Description discharge manifold of the compressor. From the discharge manifold, the gas/oil exits the compressor housing The Vilter VSG 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.
Description DESCRIPTION OF GAS SYSTEM FOR A STANDARD COMPRESSOR SET DESCRIPTION OF OIL SYSTEM FOR A STANDARD COMPRESSOR SET The gas passes through a stop valve and a check valve and then through a mesh strainer mounted directly to the inlet flange. The check valve is necessary to prevent reverse rotation and potential damage or oil loss at shut down. The suction gas enters the compressor housing through the top inlet flange, at the driven end of the unit.
Installation PIPING Before installing piping, the compressor inlet and outlet ports should be inspected to ensure no dirt is present. Piping should be supported so that no piping loads are transmitted to the compressor casings. All piping should be inspected for cleanliness before installation. As each pipe is connected to the compressor, the coupling alignment should be checked to ensure that no alteration has taken place.
Installation TESTING SYSTEM FOR LEAKS Vilter equipment is tested for leaks at the factory. One the most important steps in putting the system into operation is field testing for leaks. This must be done to assure a tight system that will operate without any appreciable loss of gas. First, if test pressures exceed the settings of the system, relief valves or safety devices, they must be removed and the connection plugged during the test.
Installation & Calibration of Slide Valve Actuators Slide Valve Actuator Installation Instructions 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 of 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 of 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 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 CONTROL SYSTEM A. Screw Compressor Control And Operation Note: Optical Actuators CAN NOT be manually rotated. View Capacity 1. Starting, Stopping and Restarting the Compressor. Before the screw compressor unit may start, certain conditions must be met. All of the safety setpoints must be in a normal condition, and the suction pressure must be above the low suction pressure setpoint to assure that a load is present.
Operation Table 1 COMP. MODEL COMMAND SHAFT ROTATION CAPACITY VOLUME INC DEC INC DEC VSSG 291 VSSG 341 VSSG 451 VSSG 601 VSG 751 VSG 901 VSG 1051 VSG 1201 VSG 1551 VSG 1851 VSG 2101 VSG 301 VSG 361 VSG 401 VSG 501 VSG 601 VSG 701 CW CW CW CW CCW CCW CCW CCW CCW CCW CCW CW CW CW CCW CCW CCW CCW CCW CCW CCW CW CW CW CW CW CW CW CCW CCW CCW CW CW CW CW CW CW CW CCW CCW CCW CCW CCW CCW CCW CW CW CW CCW CCW CCW CCW CCW CCW CCW CW CW CW CW CW CW CW CCW CCW CCW CW CW CW NO.
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 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 TABLE 2. GATE ROTOR FLOAT 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”.
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 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. E) Install a new O-ring on the seal cover, making sure the O-ring is placed in the O-ring groove and not the oil gallery groove.
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 58
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 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 KT712M GATE ROTOR BLADE REPLACEMENT KIT, 111, 118, 120A, 120B, 121, 122, 123, 124, 130, 141, 142 & 143. 2 KT713N 101 GATE ROTOR ASSEMBLY 111 & 120. 2 A25160EB 102 GATE ROTOR SUPPORT ASSEMBLY 100, 111, 120B, 119 &130. 2 A25161EB 105 GATE ROTOR GASKET SET 118, 141, 142 & 143.
Shaft Seal Shaft Seal With Stationary Carbon Face ITEM DESCRIPTION 230 260 62 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 64
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 66
Slide Valve Cross Shafts and End Plate ITEM DESCRIPTION 221 SHAFT. 222 GEAR. 226 RACK CLAMP. 227 RACK CLAMP. 228 SPACER. 268 EXPANSION PIN. 269 EXPANSION PIN. 286 SOCKET HEAD CAP SCREW. 297 SET SCREW 298 SET SCREW ITEM DESCRIPTION 220 END PLATE 221 SHAFT. 222 GEAR. 226 RACK CLAMP. 228 SPACER. 267 DOWEL PIN. 268 EXPANSION PIN. 269 EXPANSION PIN. 270 PIPE PLUG. 286 SOCKET HEAD CAP SCREW.
Capacity Slide Volume Slide Carriage Assembly Slide Valve Carriage Assembly
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. 316 RACK. 323 RACK. 343A COVER, SEPARATE VOL. & CAP. 343B COVER, ONE PIECE CAST. 345A GASKET, SEPARATE VOL. & n/a CAP COVERS. 345B GASKET, ONE PIECE CAST COVER. 350 PISTON RING SET. 355 EXPANSION PIN. 359 PIPE PLUG. 360 LOCK WASHER (PAIR). 361 WASHER. 363 NUT. 366A HEX HEAD CAP SCREW, SEPARATE VOL.
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 72
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 73
Miscellaneous Frame Components VSG Screw Compressor 74
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 82
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 ITEM DESCRIPTION * SHAFT SEAL KIT Viton Kit 219, 230, & 260. 219 230 244252260 261 SHAFT SEAL. OIL SEAL. TEFLON SEAL RETAINER RING O-RING O-RING. (205 Only) NOTE * A - MODEL NUMBER ALL VSG 301-401 QTY VPN ALL VSG 501-701 QTY VPN 1 KT709DG 1 1 1 1 1 1 1 A 1 2930C 1 25939A 1 2928M 1 2176U 1 2176AE KT709AG A 25040A 25939A 2928M 2176F 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 86
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 88
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 92
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 93
Miscellaneous Frame Components Model VSG 301-401 Model VSG 501-701 94
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 96
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.
EmersonClimate.com Vilter Manufacturing LLC P.O. Box 8904 Cudahy, WI. 53110-8904 P: 414-744-0111 F: 414-744-1769 www.vilter.com 100 (1/2011) Emerson and Vilter are trademarks of Emerson Electric Co. or one of its affiliated companies. ©2011 Emerson Climate Technoligies, Inc. All rights reserved. Printed in the USA. 35391SB Rev.
