Valco Instruments Co. Inc. 2 Position Electric Actuator Instruction Manual MAN-2EA Rev. 9/12 Printed in USA P. O.
Table of Contents 1. GENERAL DESCRIPTION...............................................................................1 2. MANUAL USE OF THE 2 POSITION VALVE ACTUATOR..............................2 3. CONTROLLING THE ACTUATOR WITH A COMPUTER................................3 3.1 Using a Relay Output 3.2 Using a Logic Level Output 3.3 Using the Output from the Actuator 3.31 Inject Contact Closure 3.32 Positive Position Feedback 4. INSTALLING A VALVE ON AN ACTUATOR.............................................
1. GENERAL DESCRIPTION Valco 2 position valves are widely used in a variety of sample injection and switching applications. Rotating them to the desired position can be done manually, but is best done automatically with either the Valco 2 Position Air Actuator or the Valco 2 Position Electric Actuator described in this manual. For most laboratory uses, especially where a laboratory computer is available for control but compressed air is not, the Valco 2 Position Electric Actuator is the best choice.
2. MANUAL USE OF THE 2 POSITION VALVE ACTUATOR The electric actuator has a control box with a two-position, spring-loaded (normally off) toggle switch and two LED’s which indicate the valve position. The valve can be moved from one position to the other by manually moving the toggle switch toward the light that is not illuminated. REMOTE SWITCHING CABLE (WITH 5 FOOT EXTENSION) Valco Instruments Co. Inc.
3. CONTROLLING THE ACTUATOR WITH A COMPUTER The remote switching cable is used to communicate a momentary or continuous contact closure or a negative true logic level signal from a data system, required for automated operation of the actuator. In addition, two of the cable’s leads supply feedback from the actuator. Since the input signal must be of 10 to 20 milliseconds duration to switch the actuator, a sub-millisecond noise spike will not start the actuator. 3.
3.2 Using a Logic Level Output If the data system uses negative true logic level output, connect the green wire (GROUND) to the Logic Ground of the data system relay. Connect the red wire (LOAD) to one output of the relay and the black wire (INJECT) to the other output. Turning the relay off will switch the actuator to LOAD and turning it on will switch it to INJECT. If the operations are reversed, simply switch the connection of the red and black wires. 3.
4. INSTALLING A VALVE ON AN ACTUATOR 4.1 Preparing a Manual Valco Valve for Mounting on an Actuator A manually switched 2 position valve has a handle or knob which must be removed before the valve can be installed on the actuator. Sections 4.11 - 4.14 describe the procedures for various Valco valves. 4.11 Disassembly of a Manual W or UW Type Valve 1. Rotate the knob counterclockwise so the valve is positioned properly for later installation on the electric actuator. 2. See Figure 4.
STANDOFF ASSEMBLY (Length varies) WITH VALVE ATTACHED KNOB ASSEMBLY WK/KNOB RETAINER HWSC-SC6-8B/ SCREW MHA/MANUAL HANDLE ADAPTER STANDOFF PRE-LOAD ASSEMBLY FLAT FACE HWSC-SS8-5B/ SET-SCREW OPTIONAL MOUNTING BRACKET OR OVEN WALL SCREWS FOR CR2 (NOT SUPPLIED) VALVE BODY Figure 5: Manual valve on a standoff 4.13 Removing the Handle from a P Type Valve These types of valves have a 1-1/8" metal rotor shaft that connects to the handle. 1.
4.14 Removing the Handle from a U Type Valve In addition to removing the handle, it is necessary to cut the 3" shaft of the manual U Type valve to approximately 1". 1. Rotate the knob counterclockwise so the valve is positioned properly for later installation on the electric actuator. 2. See Figure 7. Remove the handle by using a 1/8 hex driver to unscrew the two set screws within the handle. 3. Take all the fittings out of the valve.
4.2 Installation of a Valve With Closemount Hardware If the electric actuator has been specified for use with closemount hardware, it will be received from the factory with the CR4/clamp ring already affixed to the actuator. The clamp ring is attached to the actuator with a two HWSC-SC86TDH/modified socket head screws (8-32 x 3/8"). CAUTION: Do not use screws longer than 1/2" to attach clamp rings to electric actuators. They will interfere with internal moving parts and damage the actuator. 1.
coupling on the square driver of the actuator first. However, make sure that the driver doesn’t get cocked.) The CR41/closemount standoff should end up flush against the CR4/clamp ring. 5. Tighten the HWSC-SC6-8B/screw (6-32 x 5/8") in the clamp ring with a 7/64 hex driver. 6. Align the valve and actuator according to the Alignment Procedure found in Section 5.4. CAUTION: If the valve and actuator are not properly aligned, the slots on the valve rotor and the ports in the valve body will not align properly.
2. Remove the CR2/clamp ring from the standoff and mount it on the oven wall. (Screws are not provided for this purpose.) Slide the standoff through the CR2/clamp ring on the oven wall or bracket. (The standoff requires an 11/16" clearance hole.) 3. Firmly press the end of the standoff into the CR3/clamp ring mounted on the actuator, making sure that the square driver of the actuator engages the squared hole of the standoff drive shaft.
5. VALVE ALIGNMENT When the valve arrives from the factory installed on the actuator, it is accurately aligned and ready to use. However, every time the clamp ring on the actuator is loosened to readjust or remove the valve from the actuator, the valve and actuator alignment must be checked to be sure that the internal ports and slots on the rotor align properly. 5.
5.2 Chromatographic Symptoms of Misalignment 5.21 Loss of Flow or Blocked Flow When the rotor does not rotate completely or accurately, the ports of the valve may not intersect the engravings on the valve rotor. This can cause a loss of flow at outlets or a blockage of flow at inlets. 5.22 Multiple Peaks or Doublets In some configurations, the engraving may not be aligned properly even though flow is not eliminated.
5.4 Alignment Procedure 1. After determining that alignment is necessary, actuate the valve to the position in which the rotor pin is against the stop. 2. Loosen the clamp ring screw slightly. This will allow the actuator to complete its travel if it was being stopped by the end of the valve rotor travel. The valve body will rotate slightly. 3. Tighten the clamp ring screw and cycle the actuator to the other position. The pin should come to rest against the stop. If it does not, repeat the procedure.
6. ACTUATOR MODIFICATIONS 6.1 Adjusting the Actuator Stroke If for any reason the actuator will not rotate the valve rotor completely, or if you have reason to believe that the actuator is stroking too far, refer to the directions below to adjust the actuator for slightly more or less rotation than is supplied by the factory.
GEARSHAFT END OF GEARSHAFT CRANK CROSSLINK BOTTOM OF ELECTRIC ACTUATOR ADJUSTMENT HOLE GEARSHAFT CRANK PIN (With bracket removed) NYLON WASHER FRONT OF BRACKET FRONT OF ELECTRIC ACTUATOR 6x32 LOCKING CAP SCREW (Installed 90° from usual position) Figure 14: Actuator stroke adjustment 4. Temporarily install the mounting bracket at 90° from normal (see Figure 12) so that the adjustment hole is accessible. 5. Put the clamp ring back on and attach the valve or valve/standoff assembly.
6.2 Actuator Conversion In situations where a serviceable Valco two position actuator has been relegated to the shelf because it rotates the wrong number of degrees, it makes economic sense to restore it to useful service by converting it to the desired rotation. This can be accomplished by following the procedure in this section. You will need one of the following: For P Type valves with coil spring hardware: No.
2. Unplug the actuator. Use a 9/64 hex driver to remove the four HWSC-SC86/screws (8-32 x 3/8") which hold the black right-angle mounting bracket to the actuator. (Figure 13) 3. Use a pair of pliers to compress and remove the top two cable strain relief devices from the actuator cover. They are at the points marked REMOTE SWITCHING and MANUAL SWITCHING. Once they are out, pull them apart and remove them from the cables to allow the cables to travel freely through the holes in the cover. 4.
CRANK ASSEMBLY ORIENT SHAFT CRANK SLOT TOWARD THIS SHAFT CRANK OUTPUT SHAFT GEAR BOX CRANK ASSEMBLY SHOWN DASHED TRIANGULAR CASTING Figure 18: Removal of triangular casting 6.22 Figure 19: Shaft crank at one o’clock Installation of the New Crank Assembly 1. Screw the shaft crank of the new crank assembly onto the output shaft. Once the threads have bottomed out, use the open end or adjustable wrench to apply a sharp clockwise snap to lock it in position. 2.
6.23 Flag Adjustment As noted above, the shaft crank screws onto the threaded output shaft extending from the gearbox. On the opposite end of this shaft is a thin metal "flag" which operates in conjunction with two optical sensors to signal the motor to start and stop. (Figure 17) For the actuator to function properly, this flag must be positioned in correct relationship to the newly installed crank assembly. 1.
7. TECHNICAL DRAWINGS Electric Actuator Assembly – 110V AC ......................Drawing 21307 Page 21 Electric Actuator Assembly – 220V AC ......................Drawing 21612 Page 22 Electric Actuator Board Assembly ..............................Drawing 21312 Page 23 Schematic – Electric Actuator Assembly – 110V AC.................................................................
FROM MOTOR BLK GRY YEL 9 BLK WHT GRN 17 12 1 5 6 2 18 7 3 HI-POT COMPLETE ASSY 1500V, 1 MIN. 30 .125 16 * * * * * LTR REVISIONS DESCRIPTION DATE 20JUL94 07/01/96 11/03/98 10/05/07 09/10/08 APPROVED JDURR JDURR JDURR JDURR R.S.S. QTY 1 1 1 1 2 2 4 1 4 1 1 1 1 1 1 1 1 1 ECN #2000 ADD CSA SPEC AND TAG ECN #3268 CORRECT WIRE COLOR/FUNCTION ECN #4470 ADD CHANGES FOR GSS ITEMS ECN #9472 UPDATE TO REV U PCB ECN #10466 UPDATE GND LOC.
FROM MOTOR BLK GRY YEL 9 BLK WHT GRN 17 12 1 5 6 2 18 7 3 HI-POT COMPLETE ASSY 1500V, 1 MIN. 16 REVISIONS INITIATED DJM J DURR J DURR DATE 12/11/89 4-2-92 7/20/94 10/27/95 DESCRIPTION ECN #109 DELETE CR3 AND HWSC-SC8-8B REVISE DRAWING TO SHOW VALCO P/N ECN #2000 UPDATE PER NEW P.C.B.
NOTE PIN 1 SC6 OPPOSITE SIDE J4 OPPOSITE SIDE F1 AND FS1 OPPOSITE SIDE PCB C5 OPPOSITE SIDE SKT2 AW 132 REV U PCB OPPOSITE SIDE J1 OPPOSITE SIDE NOTE ORIENTATION OF OS1 J1 U L W SA F 2A 250V FS1 F1 H1 & H2 SLEEVE, 2 PLCS I-STUBE #19 MFG TO RoHS SPECS VALCO # I-R513300 I-R5139R0 I-R511002 I-R511001 I-RN750-83-22R0 I-RN750-83-102 I-RN750-83-473 I-RN750-61-331 I-T100-11 I-TTSW-103-19-S-S I-TSSW-103-01-S-S I-T26510032 I-RY-HAMLIN I-SW-76SD01 HWSC-PL4-4 HWSO-2334 I-TAPE-D/S FOAM SECURE C5 TO
OS1 OPB-742 A K E C A K +5 +5 1 4 5 6 RN4 330 2 3 RN3:3 47K R4 10K +5 RN2:3 1K 2A F1 RN3:4 47K 3 2 1 1 2 3 Q3 RN2:4 1K 2N44O1 C5 20uF 250V AC-HOT AC-NEUT Q2 R5 2N4401 +5 U1 VCC 1 12 11 10 13 17 RA0 18 1 RA2 2 RA3 16 OSC1 OSC2 15 RA1 3 TOCK1 4 MCLR RB7 RB6 RB5 RLY1 RB4 2 3 Q1 6 4 R2 330 1 3 6 T1 5 7 4 2 8 3 330 R1 4 3 HE3612A0500 6 RB0 PIC 7 16C54 RB1 8 RB2 9 RB3 GND JMP1 D3 1N914 AC-HOT R3 39 C4 240 120 PWR CONFIG .01uF 1KV +5 1K C6 .
8. WARRANTY This Limited Warranty gives the Buyer specific legal rights, and a Buyer may also have other rights that vary from state to state. For a period of 365 calendar days from the date of shipment, Valco Instruments Company, Inc. (hereinafter Seller) warrants the goods to be free from defect in material and workmanship to the original purchaser. Repaired parts are warranted for 90 days.