RED VALVE INSTRUCTION MANUAL
MODEL GS700 DIRECT-ACTING ACTUATOR
3.3.2 Assembly
A. If the diaphragm is being replaced, apply gasket compound (CV P/N 197077 or equivalent) to the surface of the diaphragm (Item
14) where the diaphragm stop (Item 12) seats. Assemble the diaphragm, diaphragm plate (Rem 13), and diaphragm stop to the
actuator stem (Item 16) using the flat head screw (Item 11). Torque the flat head screw to the value shown on the assembly drawing.
B. Install the spring adjuster (Item 21) in the yoke (Item 1).
C. Assemble the base (Item 2) to the yoke using hex head cap screws (Item 7) and lockwashers (Item 10). Torque the screws to the
value given on the assembly drawing.
D. Place the thrust washer (Item 18), the spring plate (Item 17), and the spring (Item 15) in the yoke.
E. Place the stem assembly in the yoke and through the spring plate and thrust washer. Align the bolt holes in the diaphragm with
the bolt holes in the base.
F. Place the cover (hem 3), with bushing (Item 41) when required, on the base and install the hex head cap screws (Item 4), hex nuts
(Item 5), and eyebolts (Item 6). Torque the fasteners to the value on the assembly drawing.
G. Place the upper stem weldment (Item 22) on the stem so that the bottom surface of the upper stem weldment is approximately
0.06" (1.5 mm) above the bottom of the stem.
H. After the actuator, is mounted on a valve, place the stem lock plate (Item 28) over the valve stem, then install the ste m clamp (Item
27) on the valve stem. Position the stem clamp as required for valve seating and travel, then tighten the setscrew in the stem clamp.
Install the socket head cap screws (Item 23) with lockwashers (Item 24). Torque the fasteners to the value o n the assembly drawing.
I. Drill holes in the yoke as directed by the assembly drawing, then install the indicator plate (Item 8) and ID plate (Item 19)
using drive screws (Item 20).
J. Apply preload to the spring by rotating the spring adjuster.
K. Cycle the actuator slowly several times to verify that no binding occurs during operation. Pressurize the actuator from 80
to 100 psig (5.5 to 7 bar) and check for leaks. Binding, noise or leakage is not acceptable.
Recommended Spare Parts:
Diaphragm p/n 185988 See #14 Fig.1
