6.4 Disassemble the BioviZion Valve
CAUTION:
Ensure the line pressure is relieved and temperature is near ambient before disassembling the
valve.
CAUTION:
Metal surfaces may be hot.
1.
Secure the bonnet in the upright orientation.
2.
Partially open the valve.
If the topworks is
Then
Manual
Turn the handwheel counter clockwise one rotation.
Actuated
Position the spindle in the partially open position. This may require ac-
tuator air pressure, depending on the actuator mode.
3.
Loosen the cover screw, allowing counter-clockwise rotation of the cover.
4.
Turn the cover counter clockwise until a hard stop is reached.
NOTICE:
Once the hard stop is reached, do not apply additional counter clockwise torque to the cover.
5.
Turn the bonnet assembly counter clockwise approximately 16° from the valve body, until the studs
stop further rotation.
6.
Lift the bonnet assembly from the valve body.
6.5 Disassemble the EnviZion Valve
CAUTION:
Ensure the line pressure is relieved and temperature is near ambient before disassembling the
valve.
1.
Secure the bonnet in the upright orientation.
2.
Partially open the valve.
If the topworks is
Then
Manual
Turn the handwheel counter clockwise one rotation.
Actuated
Position the spindle in the partially open position. This may require ac-
tuator air pressure, depending on the actuator mode.
3.
Slightly turn the cover to allow free movement of the lock-pin.
4.
Pull the cover lock-pin, rotate it 90° and release it. If the lock-pin will not rotate, then turn the cover
to allow free movement of the lock-pin.
This will secure the lock-pin in the extended position.
5.
Turn the cover counter clockwise until a hard stop is reached.
NOTICE:
Once the hard stop is reached, do not apply additional counter clockwise torque to the cover.
6.
Turn the bonnet assembly counter clockwise approximately 20° from the valve body, until the studs
stop further rotation.
6.4 Disassemble the BioviZion Valve
22
EnviZion and BioviZion Valves Installation, Operation, and Maintenance Manual