These valves are ideal when minimum pressure drop is required or for applications where the flowing stream can't be used as the power medium to operate a valve. The externally controlled main piston and the 45 degree body design assures extreme, low pressure drop.
Standard power cylinders are designed to operate on 30 psi (207 kPa) minimum for full stroke and are limited to a maximum pressure of 150 psi (1034 kPa). An optional power cylinder for 15 psi (103 kPa) full stroke is available, but limited to selected applications that can tolerate a small leakage of the power cylinder operator pressure medium to atmosphere or sump.
The power cylinder may be operated either pneumatically or hydraulically with electric, pneumatic or hydraulic pilot valves used to control application or removal of pressure from the cylinder.