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Three sizes of air operators (medium, heavy duty or extra heavy) are offered for remote on-off operation or automatic operation of Parker Autoclave Engineers medium or high pressure needle valves. The actuators are available in air-to-open (normally closed) and air-to-close (normally open) designs.
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These actuators are available in two different operator styles. The piston type air-operated valves offer a unique, reliable design providing for a long and dependable life. These valves are more compact than diaphragm valves and are appropriate for applications such as high-flow gas and liquid delivery systems to reactors and mixer/vaporizers.
The diaphragm type air-operated valves are an efficient and economical means for “remote on-off” control of a wide range of process requirements. Diaphragm type actuators are designed to provide a dependable alternative to piston type actuators.
HOW TO ORDER To order a valve with an air operator, select the duty rating and type of the air operator from the chart below. Add the air operator identify suffix to the item number of the Parker Autoclave Engineers valve (see Parker Autoclave Engineers Manual Needle Valves on preceding pages) Ex. To order a 2-way straight, 30VM vee stem, 9/16” (14.3 mm) valve with a medium duty air-to-close air operator, specify: ex: 30VM9071-C1S for a yoke style piston air actuated valve or 30VM9071-CM for an integral style diaphragm air operated valve.
Duty Rating
Medium Medium Medium Medium Heavy Heavy Heavy Heavy
Extra Heavy Single Stage Extra Heavy Single Stage Extra Heavy Two Stage Extra Heavy Two Stage