ITT Engineered Valves BioviZion, Инструкция по установке, эксплуатации и обслуживанию, Страница: 17 / 32

CAUTION:
Prior to orienting air ports: Fail Closed actuators require instrument air before rotating the ac-
tuator can assembly. Fail Open and Double Acting actuators require instrument air to be
removed before rotating the actuator can assembly.
NOTICE:
Valve actuators are limited to 100 psi instrument air.
NOTICE:
• EnviZion stainless steel actuators are maintenance free and can not be disassembled.
• EnviZion Fail closed actuators (ZA2, ZB2 codes) require instrument air to install or re-
move the actuator from the valve body.
1. If equipped with optional EnviZion Bonnet Guard, then:
a) Remove the EnviZion Bonnet Guard cap counter clockwise to access the bonnet locking pin.
b) After the bonnet installation reinstall the EnviZion Bonnet Guard seal and cap with one of the
methods below:
Method Steps
Method 1 Tighten the Sealed Cap by applying 4-5 lb/in CW
torque.
Method 2 • Finger tighten the cap with a moderately strong
effort using a 9/16 in. socket.
NOTICE:
Keep the gasket clean of grease.
2. Secure the valve body in the upright orientation or within the piping.
3. Inspect the valve body seal surface for defects and if it is damaged, repair the body prior to use.
4. Partially open the valve.
If the topworks is Then
Manual Turn the handwheel counter clockwise one rotation.
Actuated For spring actuated valves, add air to the actuator to place the spindle
in a partially open position.
5. Ensure the backing cushion tabs are properly engaged with the bonnet recesses.
6. Position the diaphragm and bonnet assembly above the valve body while maintaining the dia-
phragm position.
7. Visually align the bonnet locating buttons with the valve body studs.
NOTICE:
Do not allow the diaphragm sealing surfaces to touch the valve body studs.
4.3 Assemble the EnviZion Valve
EnviZion and BioviZion Valves Installation, Operation, and Maintenance Manual 15