Alicat PCD Dual Valve Pressure Controller

Alicat PCD - Differential Pressure Controller

Alicat PCD - Dual Valve Differential Pressure Controller - Colour screen

Alicat PCD - Dual Valve Differential Pressure Controller

We aim to respond within 1 hour

Available for gauge and absolute pressures up to 3000 PSI / 207 Bar
Differential pressures up to 100 PSI / 7 Bar
50-100 ms speed of response stills upstream fluctuations
Dual valve for standard closed volume applications
Up to ±0.125% of full scale accuracy

Fast-responding pressure, vacuum or differential control for closed volumes

Alicat PCD series allow for stable and response control within closed volumes, they reduce wasting costly gases as there is no continuous bleed valve. PCD series incorporates a second, independently controlled exhaust valve that actuates only when the pressure needs to be reduced, minimising the amount of gas venting.

Repeatable and accurate

The PCD series Alicat dual valve pressure controller is repeatable and accurate with calibrations up to +/- 0.125% of full scale accuracy. Every PC series controller has a 1/8” NPT female connection and are typically suited to low flow pressure applications.

Turndown ratio

Every Alicat pressure controller has a 200:1 turndown ratio with many standard pressure ranges available, standard pressure units include PSIA, PSIG, mmHG, inHG, inH2O, mBar, Atm, Torr and kPa.

TFT and LCD display options

The digital pressure controller features a local LCD screen and push button user interface to change process variables. A colour TFT display is also an option to. RS-232 communications are standard as well as an analogue output signal such as 0-5Vdc. Modbus-RTU, available over RS-232 or RS-485 and PROFIBUS protocols are also available.

Every Alicat device is backed by the manufacturers limited life time warranty and ships with a NIST traceable calibration certificate.

Ask Alicat: How do you control pressure in a closed system?

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Applications

Common process applications and industrial uses include:

High-Efficiency Helium Leak Testing
Stable control of pressures in closed systems without continuous gas bleeding.
Fluid Dispensing
Extrusion Processes
Micro Fluidics
Burst Pressure Testing
Fuel Cell Testing

Other features

Optional ATEX Zone 2 Area Classification, permits operation in hazardous environments. (Ex nA IIC, T4 Tamb. -40°C ≤ Ta ≤ +50°C).
9-pin or 15-pin D-sub connectors, configured to match any existing pinout.
Accessible PID valve tuning for best speed and stability.
Custom valve orifice sizing yields full-range stability.
Read our article we've written on PCD-Series Dual-Valve Pressure Controllers