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Diaphragm and Piston Pneumatic Actuators

Diaphragm Pneumatic Actuator

Features and Benefits

Diaphragm Pneumatic Actuators Features and Benefits

•  Improved sealing method: The diaphragm is designed with a metal sealing component. This eliminates the need to forcibly seal the diaphragm and improves design integrity.


•  Personnel Safety: A safety shear ring prevents actuator removal in the event that control pressure is unknowingly trapped.


•  Less Maintenance: Longer Seal Life is maintained through use of rolling diaphragm.


•  Control Pressure Protection: A pressure relief valve on the top diaphragm housing protects the diaphragm and personnel from over-pressurization of the actuator.


•  Corrosion Resistance: Non stainless components are phosphate coated for longer wear life.


•  No Special Tools: No special tools are required for spring installation or removal.


•  Bonnet Packing Leak Detector: A tattletale fitting located above packing visually confirms packing leaks.


•  Back Seat Verification: A test fitting located above the bonnet stem backseat provides verification of the stem to bonnet, metal to metal seal integrity.


•  Ease of Maintenance: Top shaft seals are easily replaced in the field by simply removing a retainer ring. Disassembly of the actuator or upper housing is not required for seal replacement.


•  Fire seal: A metal to metal seat design between the actuator, bonnet and stem serves as a secondary fire seal if high temperatures destroy lower stem bonnet packing.