PCD–Dual Valve Differential Pressure Controllers
Closed-volume differential pressure control
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Measure the differential pressure between any two points in your closed process volume, and control flow at a different point to ensure the pressure differential remains constant. Alicat’s PCD series dual-valve pressure controllers use two proportional valves to precisely control the pressure of gases within dead-ended volumes. The two process ports connect to opposite sides of the differential pressure sensor; positive readings denote higher pressure at the left (upstream) process port, and negative readings denote higher pressure at the right (downstream) port. We’ll use your application parameters to customize your valve and PID tuning to ensure that your controller delivers fast and stable control.
- Fast & Accurate. Very fast valves and PID control algorithms hit pressure setpoints in milliseconds with NIST-traceable accuracy.
- Connected. Easy integration into your digital industrial network with EtherNet/IP, EtherCAT, DeviceNet, Profibus, Modbus (RTU and TCP/IP) or serial communications options.
- Efficient & Versatile. The dual-valve design incorporates a second proportional valve to exhaust excess pressure, but only when needed to maintain your setpoint. Plumb the two pressure ports wherever you need to measure and control the pressure difference. Or use the instrument as a gauge pressure controller by leaving the downstream port open to atmosphere.
Alicat’s PCD series uses small proportional valves for control at lower flow rates and is suitable for use with non-corrosive gases.
Alicat’s PCDP series offers the largest orifice in a small valve format and is suitable for use with non-corrosive gases.
Alicat’s PCDH series pairs two small valves working side-by-side as one and is suitable for use with non-corrosive gases.
Alicat’s PCRD series uses nearly frictionless Rolamite valves and a variety of orifice patterns for control at high flow rates and is suitable for use with non-corrosive gases.
Alicat’s PCDS series uses small proportional valves for control at lower flow rates and is suitable for use with liquids and corrosive gases.
Alicat’s PCDHS series is suitable for use with liquids and corrosive gases and pairs two valves working side-by-side as one to provide greater control at higher pressures.
Alicat’s PCRDS series is suitable for use with liquids and corrosive gases and uses nearly frictionless Rolamite valves and a variety of orifice patterns for control at high flow rates.