VICI Two position Standard electric User Manual
Valco Instruments Co. Inc.
2 Position
Electric Actuator
Instruction Manual
P. O. Box 55603, Houston, TX 77255
(713) 688-9345
•
Sales toll-free (800) 367-8424
Fax (713) 688-8106
MAN-2EA
Rev. 9/12
Printed in USA
Table of Co ntents
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....................................................5
4.1 Preparing a M anual Valco Valve for Mounting on an Actuator
4.11 Disas sembly of a Manual W or UW Type Valve
4.12 Removing the Handle or Knob from a Valve on a Standoff
4.13 Removing the Handle f rom a P Type Valve
4.14 Removing the Handle from a U Type Valve
4.2 Installation of a Valve With Closemount Hardware
4.3 Installation of a Valve With a Standoff
5. VALVE ALIGNMENT.......................................................................................11
5.1 Visually Checking the Alignment
5.2 Chromatographic Symptoms of Misalignment
5.21 Loss of Flow or Blocked Flow
5.22 Multiple Peaks or Doublets
5.3 Causes of Misalignment
5.31 Removal of the Valve from the Actuator for Mounting
5.32 Shock from Heavy or Continuous Use
5.4 Alignment Procedure
6. ACTUATOR MODIFICATIONS ....................................................................... 14
6.1 Adjusting the Actuator Stroke
6.2 Actuator Conversion
6.21 Disassembly
6.22 Installation of the New Crank Assembly
6.23 Flag Adjustment
7. TECHNICAL DRAWINGS...... .. .. .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .... .. .. .. .. .. .. .. .. .. .. .20
8. WARRANTY............... .. .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .25
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
contr ol bu t com pres sed a ir i s not , t he Valco 2 Position Elec tri c A ctua tor i s th e be st
choice.
Valco 2 Position Ele ctric Ac tuators are available in 110VAC or 220VAC models for
any 30° , 36 °, 45° , 60 °, or 90 ° Valco valve. The mod el n umb ers o f t he act u ato rs ar e
respectively E30, E36, E45, E60, and E90. (Or E30-220, etc.) An electric actuator
can be retrof itted to ex isting a ir actuate d or manu al valves and i s compat ible with
all Valco close coupling and standoff assembly hardware.
The 2 position electric actuator is a complete system, with all the necessary cables
and power cord. It consists of (a) the actuator itself, (b) a control box with LED
display, and (c) an interface cable for remote switching. The actuators are normally
suppli ed w ith a mot or/ gear train tha t moves t he val ve from Position A to Position B
in 0.56 seconds. All electric actuator models use separate line voltages (120V AC
or 220V AC, 50/60 Hz) and require no power from the chromatograph with which
they ar e u se d.
1
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.
POS B
(INJECT)
POS A
(LOAD)
HOLES FOR
CLAMP RING
SCREWS
CONTROL BOX AND
CABLE (4 F E ET )
2 AMP F USE
POWER CORD (5 FEET)
MOUNTI N G B R ACKE T
Figure 1:
Actuator dimensions
8-32 MOUNTING HOLES
(FOUR PLACES)
2
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.
3.1 Using a Relay Output
If the data system has two relays available, then one relay can be dedicated to
each position of the actuator. This is ideal, since it allows the manual switch to
function normally. Connect the black wire (INJECT) to the normally open (NO)
terminal of the first relay and the the green wire (GROUND) to its common or logic
ground ter min al. Connect the r ed wi re ( LOAD) t o the nor mally open (NO) t er mina l
of the second relay, and connect a jumper wire from the common or logic ground
of the first relay to that of the second. (
Program the data system to energize the first relay when the valve is to be
switched to t he I N JEC T po s iti on , le avin g i t en er gi zed for only t wo o r th ree se con ds.
Likewise, at the time for LOAD, turn on the second relay for a few seconds. The
INJECT relay must be turned off before the LOAD relay is turned on, and vice
versa. If the valve will not move out of a position, it is most likely that the relay
which switched it to that position has not been turned off. When n either rel ay is
energized, the manual toggle switch can be used as described on the previous
page.
Figure 2
)
RELAY 1
GND
NO
GRD
NO
RELAY 2
GREEN
BLACK
RED
Figure 2:
If the data system has only a single double-pole relay with normally open (NO)
and normally closed (NC) terminals (
Figure 3
), connect the green wire (GROUND)
to the relay common or logic ground. Connect the black (INJECT) wire to the
normally open (NO) relay terminal and the red (LOAD) wire to the normally closed
(NC) terminal. The computer must be programmed to keep the Normally Open
(NO) relay contact engaged (ON) as long as the actuator is to be in the INJECT
position.
GREEN
GND
Dual relay connection
NO
NC
BLACK
RED
Figure 3:
Single relay connection
3
3.2 Usi ng 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 sy stem relay. Connect the red wire
(LOAD) t o on e out put of the re lay and the bla ck wir e (INJ ECT) to th e othe r out put.
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.
3.3 Using the Outp ut from th e Actuator
The whi te and cl ear wires can perform either of two func tions, depen ding on the
setting of the dipswitch on the circuit board. The factory setting is for the Inject
Contact Closure mode.
3.31 Inject Co ntact Closure
In this mode, which is the factory default, the white and clear wires provide a
conta ct closur e when the ac tuator moves to the INJ ECT positio n. (The closure is
approximately two seconds long.) It may also be used to "spike" a recorder or to
start a ny d evice eq uipp ed wi th a r emo te c on t act c los ur e in pu t.
3.32 Positive Position Feedback
To change t he setti ng on th e dipswitc h, follow St eps 1-4 in Sectio n 6.21,
Conversion, Di sassem bly
for the ma nual switch ing cable. (See Draw ing 21312 , page 23. ) In this mod e, the
clear w ire carr ies a logic hi gh when the ac tuator is in the Posi tion A (LOAD) : the
white wire carries a high when the actuator in is Position B (INJECT).
. The dipswitc h is on th e boa rd next to the conn ection s
Actuator
4
4. INSTALLING A VALVE ON AN ACTUATOR
4.1 Pr eparin g a Ma nual Valco Valve for Mo unting on an Actu ator
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.
HWSC-SS8-5B/
SET-SCREW
WK/KNOB
HWSC-SC8-16
SCREWS
2. See
Figure 4
. Loosen the set-screw within the W valve knob and pull the
knob off of the manual drive shaft.
3. Using a 9/64 hex driver, unscrew the two HWSC-SC8-16/socket head
screws (8-32 x 1") until the valve comes loose from the rest of the assembly.
Keep the driver with the valve.
4. The rest of the assembly will slide easily apart, but you may wish to keep it
together for future use.
5. Proceed to Section 4.2 for c losemount assembly, or Sec tion 4.3 if the valve
will go on a standoff before being installed on the actuator.
KNOB ASSEMBLY
WSB/SHAFT
BEARING
PLATE
Figure 4:
WSH/SHAFT HOUSING
STANDARD
ANGLE
BRACKET
WDS/MANUAL
DRIVE
SHAFT
FLAT
FACE
W or UW type valve with knob assembly
WD/DRIVER
ROTOR
PIN
COLLAR
CUTOUT
VALVE
BODY
PRE-LOAD
ASSEMBLY
4.12 Removing th e Hand le or K nob from a Valve on a S tandof f
1. Rotate the knob counterclockwise so the valve is positioned properly for
later installation on the electric actuator.
2. See
Figure 5
. Simply pull the handle or knob, with the manual handle
adapter and retainer, off of the standoff tube.
3. Proceed to Section 4.3.
5
KNOB ASSEMBLY
STANDOFF ASSEMBLY (Length varies)
WITH VALVE ATTACHED
HWSC-SS8-5B/
SET-SCREW
WK/KNOB
RETAINER
MHA/MANUAL
HANDLE
ADAPTER
FLAT FACE
Figure 5:
HWSC-SC6-8B/
SCREW
SCREWS
FOR CR2
(NOT SUPPLIED)
Manual valve on a standoff
STANDOFF
OPTIONAL
MOUNTING
BRACKET OR
OVEN WALL
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.Rotate the knob counterclockwise so the valve is positioned properly for
later installation on the electric actuator.
2.See
Figure 6
. Remove the black handle by sliding its shaft out of the
coupling.
3.Place the coupling in a bench vise with the side with only one hole facing
up. Use a hammer and punch to remove the roll pin which connects the
coupling to the valve rotor shaft. Pull the coupling off of the shaft.
PRE-LOAD
ASSEMBLY
VALVE
BODY
CAUTION: Do not hold the valve body in the vise when removing t he
coupling. Valve damage will result.
4.Proceed to Section 4.2 for closemount assembly, or S ection 4.3 if the valve
will go on a standoff before being installed on the actuator.
HANDLE ASSEMBLY
ROTOR
PIN
HWSC-SS10-3B/
SET-SCREW
SVH/
STANDARD
HANDLE
FLAT
FACE
Figure 6:
ROLL
PIN
SHAFT
COUPLING
P Type valve with an SVH handle
(Varies with valve type)
CUTOUT
SPRING HARDWARE
VALVE
BODY
6
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 ap proxim at el y 1" .
1. Rotate the knob counterclockwise so the valve is positioned properly for
later installation on the electric actuator.
2. See
two
Figure 7
set screws within the handle.
. Remove the handle by using a 1/8 hex driver to unscrew the
3. Take all the fittings out of the valve. Cover all the ports with mas king tape
so that no debris can enter the ports.
4. Clamp the end of the shaft,
not the valve body
, in a bench vise. Carefully
cut the valve shaft to a length of 1" or less with a hack saw. Be sure not to
let the valve fall and become damaged.
CAUTION: Do not ho ld the val ve b ody in th e v ise wh en c ut ti ng the
shaft. Valve damage will result.
5. Proceed to Section 4.3.
ROTOR P IN
SPRING HARDWARE
UHT/
HANDLE
SHAFT
(Varies with valve type)
HWSC-SS1/4F-4B
SET-SCREWS
FLAT FACE
Figure 7:
CUTOUT
VALVE
BODY
U Type valve with UTH handle
7
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