Table of Contents
Advertisement
9. Actuators
9.1 Types 87/88 Actuators
Assemble the pneumatic actuator onto the control valve using the
appropriate instructions for the specific actuator model and type.
Connect air pressure lines to the actuator ports to meet intended
operating mode (i.e., air-to-extend, air-to-retract, or double-
acting). For further details dealing with removal, maintenance,
WARNING
assembly and adjustment, please refer to Instruction Manual
19530.
10. Bellows Seal Assembly
CAUTION
Since this is a sealing bellows, the plug stem should
never be turned under any circumstances.
WARNING
CAUTION
There is a built-in anti-rotation feature, consisting of a double flat
surface machined on the plug stem that slides into a rectangular
slot machined in the upper bushing (30) of the bellows (see
Figure 19 – Section a).
CAUTION
IT IS IMPORTANT TO DISCONNECT THE ACTUATOR
FROM
THE
VALVE
ACTUATOR ROTATIONAL POSITION.
CAUTION
Figure 2 – Typical Installation
Skirt &
Insert
Retainer
Set
Screw
Plug Tip
3
/
" - 2" Valve Sizes
4
Figure 3 – Soft Seat Plugs (Optional)
10 | Baker Hughes
BEFORE
CHANGING
DANGER
Shank
Flats
Flats
Set
Screw
DANGER
Insert
Retainer
Plug
Tip
Insert
O-ring
3" - 8" Valve Sizes
Figure 5 – Lubricator Connection (Optional)
THE
LE (Low Emission) Packing Arrangement (Optional)
Figure 7
Copyright 2023 Baker Hughes Company. All rights reserved.
Advertisement
Table of Contents
