Front-Head Fixed Volume Clearance Pockets

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Valve cap pocket, volume type with double deck valve. Used where added fixed clearance is desired, or not a problem. Provides additional valve flow area, compared to single deck valved cylinders.

Valve cap pocket, volume type with half deck valve. Used where fixed clearance must be kept to a minimum while still maintaining reasonable valve flow area.

Front head and body pocket, volume type. Usually can provide larger volumes than valve cap pockets.

Valve cap, or front head volume pocket by-pass retrofit, a method to upgrade manual operators (handwheels) with pneumatic actuators. Conversion available for most styles. Normally requires no reworking of existing equipment.

Multipocket head end volume pockets allow for smoother transitions in load and flows. Typically, this results in increased flows per unit.