COPES-VULCAN INSTRUCTION MANUAL
MODEL 700 DIRECT-ACTING ACTUATOR
Rev.5 (08/10) Page 12 of
20 Form 01:P224:37
3.3 DIRECT-ACTING ACTUATOR
(Refer to Figure 1 and the Actuator Assembly Drawing)
3.3.1 Disassembly (Cont’d.)
F. If the diaphragm is not being replaced, remove the stem and diaphragm plate assembly
(Items 11, 12, 13, 14, and 16). If the diaphragm is being replaced, unscrew the flat head
screw (Item 11), then remove the diaphragm stop (Item 12), the diaphragm (Item 14), and the
diaphragm plate (Item 13).
G. If necessary, remove the actuator stem (Item 16), the spring (Item 15), the spring plate
(Item 17), and the thrust washer (Item 18).
H. If necessary, remove the base (Item 2) by removing the hex head cap screws (Item 7) and
lockwashers (Item 10).
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 (Item 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 (Item 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 stem 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 on the assembly drawing.
To Next Page
Loading...
Need help?
General