Flowserve Valtek Position Pac - Manual (Page 3)

29-3 Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
6. To adjust the limit switches and/or position transmit-
ter, remove the housing cover and refer to the Cali-
bration section in this document.
WARNING: On explosion-proof installations,
disconnect electrical power or be certain the
area is safe from combustible atmospheres be-
fore removing the housing cover.
7. Replace the housing cover.
8. Reinstall the name plate to the mounting bracket.
NOTE: Name plate reinstallation is important for
valve identification/servicing purposes.
Valtek Rotary Actuators
To install Position Pac on Valtek rotary actuators, refer
to Figures 3 and 4, and proceed as follows:
1. Mount the bracket to the mounting pad on the back-
side of the actuator using two 0.31-inch ( 5 /
16
) mount-
ing bolts.
2. Mount the Position Pac to the bracket using four
0.31-inch ( 5 /
16
) mounting bolts and nuts.
3. Loosely mount the trip lever to the valve shaft within
the yoke.
4. Attach the switch lever to the Position Pac shaft.
5. Connect the linkage assembly to both levers as
shown in Figure 3.
6. Measure the approximate radius of the trip lever from
the center of the valve shaft to the linkage assembly
connection (not the end of the lever). Next, adjust
the switch lever to approximately the same radius
and tighten.
Figure 3: Rotary Application – Rear View
(cover removed; air-to-close valve)
Figure 4: Rotary Application – Front View
(cover removed; air-to-close valve)
For direct-acting, air-to-open actuators, rotate the
shaft counter clockwise as far as it will go, then back
off approximately 5 to 10 degrees. For direct-acting,
air-to- close actuators, rotate the shaft counter clock-
wise approximately 5 to 10 degrees.
For reverse-acting, air-to-open actuators, rotate the
shaft counter clockwise approximately 5 to 10 de-
grees. For reverse-acting, air-to-close actuators,
rotate the shaft counter clockwise as far as possible,
then back off approximately 5 to 10 degrees. With the
slot in this position, tighten lever arm clamp screw
tightly (until the teller tab will not move). With this pro-
cedure completed, stroke valve to ensure spring is
preloaded throughout the entire valve travel.
5. To make electrical connections, remove the housing
cover.
WARNING: On explosion-proof installations,
disconnect electrical power or be certain the
area is safe from combustible atmospheres be-
fore removing the housing cover.
(Refer to the specifications in Table IV for component
electrical ratings.) Attach transmitter signal wiring to
the transmitter terminal block, using caution to attach
the positive and negative wires to the appropriate
terminal.
CAUTION: Do not apply a voltage greater than 40
volts to the transmitter terminals or the circuit
will be damaged.
Attach limit switch wiring to the ‘COMM’ (common)
and either ‘NC’ (normally closed) or ‘NO’ (normally
open) terminals according to the needed signal.