Mounting The Actuator Onto The Valve; Coupling Type "A; Coupling Types "B1", "B2","B3" And "B4 - Emerson Bettis XTE3000 Installation, Operation And Maintenance Manual

Section 3: Installation
October 2019
WARNING
Never lift the valve/actuator assembly without securing slings to both the valve and
the actuator. Never use the handwheel to lift the actuator.
Table 5.
Model
010
020
030
040
050
3.4

Mounting the Actuator onto the Valve

Lubricate the valve stem.
Thoroughly clean the coupling surfaces of the valve and actuator flanges, and degrease
them carefully since torque is transmitted by friction.
Lift the actuator with slings suitable for its weight.
The actuator will operate properly in any position. When mounted upside-down, a 5 mm
diameter hole should be drilled in the end of the stem cover to avoid build-up of service
fluid or rainwater.
3.4.1

Coupling Type "A"

Place the actuator vertically on the stem, screw the threaded bushing of the coupling block
on the valve stem, and then rotate (normally counterclockwise) until the coupling block
and flange surfaces of the valve are securely in contact.
For safety purposes, rotate the handwheel in the opening direction for about two turns in
order to lift the valve gate from its seat to avoid imparting (during bolt fixing) excessive
axial thrust on the internal parts of the valve and the actuator.
Depending on the conditions of assembly, it could be easier to separate the thrust block
from the actuator and mount it onto the valve yoke.
3.4.2

Coupling Types "B1", "B2","B3" and "B4"

Check the dimensions of the valve mounting details, and pay particular attention to the
protrusions of the valve stem in order to avoid any axial thrust on the internal parts of the
actuator or the valve when the screws are tightened.
Manually engage the actuator using the handwheel and place the actuator vertically on
the valve stem. Perform the coupling operations (with the aid of manual operation if
necessary); make sure no mating parts are forced.
16
Installation, Operation and Maintenance Manual
Max. weight, kg (lb)
32 (70.6)
38 (83.8)
46 (101.4)
56 (123.5)
73 (160.9)
MAN-02-04-97-0713-EN Rev. 1
Installation