Install Instructions

Document No. 129-496
Installation Instructions
July 21, 2010
Page 3 of 6
Installation, Continued
EA1214R1
4
3
2
1
5
Normally Closed (NC) Valve and Actuator
Assembly (GMA and GQD):
1. For NC valve applications, you must rotate the ball
valve bracket shaft to the full (90°) clockwise
position prior to assembly to the valve.
a. Non-installed valves - visually verify that the
ball valve is closed by looking into the "A"
(inlet) port. See
Figure 4.
b. Installed valves - See
Figure 1 or Figure 2 to
check the stem position with respect to the
flow arrow imprinted on the valve.
2. The OpenAir GMA actuator comes from the factory
with a 5° preload. This must be released prior to
assembly. The gear train of the GMA actuator may
be released by using the override drive to slightly
advance the actuator. After the gear train lockpin
disengages, the actuator will return to its fail-safe
position.
The GQD actuator does not ship with any preload,
and comes ready to assemble to the valve.
3. Before assembling the actuator to the ball valve
bracket shaft, flip the actuator over so the actuator
zero indication is to the right.
4. Slide the actuator over the ball valve bracket shaft
and onto the lowest available step of the ball valve
bracket.
NOTE: The GQD actuator will rest on the
lowest step. The GMA actuator will rest
on the second lowest step of the
bracket. See
Figure 6
5. Tighten the actuator to the shaft:
Figure 5. Order of Assembly.
a. GMA –- use a 10 mm socket wrench to apply
60 to 90 lb-in torque
b. GQD – use a 3 mm Allen wrench to apply 44 to
60 lb-in torque.
6. Assemble the handle to the end of the shaft with
the 6/32-inch × 3/4-inch screw provided until the
handle has no free play.
The installation is now complete
Siemens Industry, Inc.