February 2022
Installation, Operation and Maintenance Manual
VCIOM-15345-EN Rev. 1
10
Installation
Section 2: Installation
2.5
Installing the Biffi EHO Actuator on the Valve
The actuator will be bolt-mounted directly to a bracket or adaptor that will be bolted
securely to the mounting flange top works of the valve.
2.5.1
Check to see that the dimensions of the bracket or adaptor are suitable for use
with the valve mounting flange and stem.
2.5.2
Check valve direction of rotation and the actuator direction of rotation to see they
match (for example: CW = close, CCW = open).
2.5.3
Check to see the actuator and valve are in the same relative position
(see Section 2.3.3).
2.5.4
Check all mounting surfaces, they must be clean and free of debris to permit
proper fit up.
2.5.5
Prior to mounting, grease the coupling bore and the bore of the actuator.
NOTICE
Do not apply grease to the mounting flange surfaces on the valve or the adaptor.
2.5.6
Install the stem key and grease it (keys may be held in place with tape).
2.5.7
Install the coupling onto the stem and stem key.
2.5.8
Install the coupling key and grease it.
2.5.9
Carefully align the coupling and key to the bore and keyway in the actuator and
slide the actuator onto the coupling until the adapter (bracket) bottoms out on
the valve bonnet.
NOTICE
Ensure the adapter seats out on the valve bonnet, without interference, before
installing fasteners.
2.5.10
Use the required fasteners to firmly attach the adapter to the valve bonnet.
Tighten the fasteners to their manufacturer’s recommended maximum torque
(dry or lubricated).
