Installing The Eho Actuator On The Valve; Setting The Stroke Limit Stops - Emerson Bettis EHO Installation And Operation Manual

Installation and Operation Manual
Part Number: VA001-507-32, Rev. 1
2.5

Installing the 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
2.5.2
2.5.3
2.5.4
2.5.5
NOTE:
Do not apply grease to the mounting flange surfaces on the valve or the adaptor.
2.5.6
2.5.7
2.5.8
2.5.9
NOTE:
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.
2.6

Setting the Stroke Limit Stops

2.6.1
2.6.2
2.6.3
2.6.4
Installation
Check to see that the dimensions of the bracket or adaptor are suitable for use
with the valve mounting flange and stem.
Check valve direction of rotation and the actuator direction of rotation to see
they match (for example: CW = close, CCW = open).
Check to see the actuator and valve are in the same relative position (see 2.3.3).
Check all mounting surfaces, they must be clean and free of debris to permit
proper fit up.
Prior to mounting, grease the coupling bore and the bore of the actuator.
Install the stem key and grease it (keys may be held in place with tape).
Install the coupling onto the stem and stem key.
Install the coupling key and grease it.
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.
Tighten the fasteners to their manufacturer's recommended maximum torque
(dry or lubricated).
The Bettis G-Series is provided with bi-directional travel stops allowing 80° to
100° total travel (+/- 5° adjustment at each end of the 90° stroke).
Actuators are shipped from the factory with the travel stops adjusted for
approximately 90° rotation. Generally, it is necessary to make slight travel
stop adjustments once the actuator is installed on the valve. Refer to the valve
manufacturer's recommendations for specific requirements.
When the valve has internal stops, the actuator stops must be set so that the
load is applied to them, not the valve stops.
If adjustment is required, use the hand pump to move the actuator off the stop
at the closed position before attempting to turn the adjusting screw (refer to
4.4, Hand Pump Operation).
Section 2: Installation
August 2016
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