Integrity of double acting air actuators
Integrity of double acting air actuators
(OP)
Due to the cost and reliability of using spring packs on some particular valves I'm looking at changing to double acting air actuators.
The valves have a required fail position. This then leads to the valves needing a reservoir of instrument air to ensure they can move to the fail position if we lose the main instrument air header.
I would like to know if there are any standard requirements to ensure the integrity of this reservoir (eg. are block valves allowed d/s of reservoir, how close does the reservoir need to be to the actuator, does a check valve suffice in preventing loss of reservoir to the main instrument air header, does the reservoir require its own pressure indication etc)
The valves have a required fail position. This then leads to the valves needing a reservoir of instrument air to ensure they can move to the fail position if we lose the main instrument air header.
I would like to know if there are any standard requirements to ensure the integrity of this reservoir (eg. are block valves allowed d/s of reservoir, how close does the reservoir need to be to the actuator, does a check valve suffice in preventing loss of reservoir to the main instrument air header, does the reservoir require its own pressure indication etc)





RE: Integrity of double acting air actuators
RE: Integrity of double acting air actuators