Pressure Controllers & Transducers

Pressure Controllers & Transducers
PCD–Series: Dual Valve Absolute and Gauge Pressure Controllers

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PCD–Series: Dual Valve Absolute and Gauge Pressure Controllers

PCD-Series Dual Valve Absolute and Gauge Pressure Controllers use two proportional valves to precisely control the absolute or gauge pressure of gases within closed or dead-ended volumes.

Fast & accurate. Custom valve sizing and PID tuning ensure controllers reach pressure setpoints in milliseconds and maintain control with NIST-traceable accuracy to ±0.125% of full scale.
Efficient, versatile control. Maintain absolute or gauge pressure immediately upon powering up, with readings displayed in your choice of engineering units. Additionally, the second proportional valve exhausts excess pressure only when needed to maintain your setpoint, eliminating the need to continuously bleed costly gas.
Easy integration. Custom process ports and electrical connectors, and your choice of EtherNet/IP, EtherCAT, DeviceNet, Profibus, Modbus (RTU and TCP/IP), or serial communications for easy integration into your industrial process.

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Accessories included with purchase

FlowVision software (free download)

Device specs and customization options

Quick Specs

Absolute/gauge PCD-Series performance

Available full scale ranges:
- Absolute: max 0–3000 PSIA; min 0–15 PSIA
- Gauge: max 0–3000 PSIG; min 0–5 PSIG*
Steady state control range: 0.01% – 100% of full scale
Standard accuracy calibration, NIST-traceable: ±0.25% of full scale
Optional high-accuracy calibration, NIST-traceable: ±0.125% of full scale
Repeatability: 0.08% of full scale
Typical control response time: as fast as 30 ms
Warm-up time: <1 s

*Negative gauge pressure readings (to –15 PSIG) can also be included in gauge ranges.

Absolute/gauge PCD-Series operating conditions

Compatible gases: All non-corrosive gases
Operating temperature: –10°C to +60°C
Burst pressure: 3x full scale (1.5x full scale for 500 to 3000 PSI devices)

Device Ranges & Full Specs

Gauge devices are custom ranged from 0.07 PSID (2 inH₂O) full scale to 3,000 PSIG full scale, and absolute devices are custom ranged from 15 PSIA full scale to 3,000 PSIA full scale. All devices have a controllable range of 0.01% to 100% of full scale.

For specs on all device ranges, see the PCD-Series device specs.

For a comprehensive device guide, read the dual valve pressure controller operating manual.

Device Features

Included with each device

User changeable units of measurement: Change the unit of measurement for pressure from our extensive list of engineering units.
Monochrome backlit LCD with integrated touchpad: Easily read measurements using the backlit display and control configurations with the user-friendly integrated touchpad.
User adjustable setpoint ramping & limits: Configurable ramp rates allow the process variable to be controlled as fast or as slow as desired, and configurable setpoint limits protect processes from inadvertent setpoint changes.
Valve close override and valve open override: Utilize alarms to quickly vent your system or stop all flow as needed.

Request at time of purchase | Additional cost

Optional integrated potentiometer control: Use the integrated potentiometer to adjust setpoints with the simple turn of a knob.

Device Customization Options

Build and performance options

Communication protocols: Analog, RS–232, RS–485, DeviceNet, EtherCAT, EtherNet/IP, Modbus RTU or TCP/IP, PROFIBUS
Displays: Backlit monochrome or color; integrated or panel–mount
Process connections: NPT, SAE, AN, BSPP/G, compression, VCR, or VCO fittings
Elastomers: Viton, FFKM, EPDM, Silicone
Calibration: High-accuracy; custom calibration points

Visit the device customization page

Valve options & PID tuning

Your pressure controller may be customized with one of the following valving options to ensure optimal performance under your expected process conditions.

PCD – small proportional control valves for flow ranges below 20 SLPM
PCD with PCA designation – high-performance proportional control valves used for applications with higher pressures
PCDP – small proportional control valves with the largest orifice (not available for corrosive configurations)
PCDH – hammerhead configuration, which pairs two small valves working side-by-side as one valve at each of the two valve positions
PCRD – nearly frictionless large Rolamite proportional valves for flow rates of 20 SLPM and above

Custom PID valve tuning ensures maximum performance for your specific process conditions.

Learn about valve sizing and PID tuning options

Optional Accessories

Accessories | Sold separately

Process port fittings and filters
Power supplies
Communications cables and conversion cables
BB3 and BB9 multi-drop breakout boxes

Visit the accessories page

Not exactly what you’re looking for?

Explore other dual valve pressure control options, including anti-corrosive, remote sensing, and differential pressure devices.
Check out our other pressure or flow control and measurement solutions.
Our expert team of applications engineers is available to provide additional information, discuss your application, or answer any questions you may have.

Contact an applications engineer

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