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 ranges:
- Absolute: max 0–3000 PSIA; min 0–15 PSIA
- Gauge: max 0–3000 PSIG; min 0–2 inH₂O*
Steady state control range: 0.5% – 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 100 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 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 0.5% to 100% of full scale.

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

Device Customization & Accessories

Device customization | Build and performance options

Communications protocols: analog, RS–232, RS–485, DeviceNet, EtherCAT, EtherNet/IP, Modbus RTU or TCP/IP, PROFIBUS
Displays: monochrome or color; integrated or panel–mount
Process connections: NPT, SAE, AN, BSPP/G, welded compression, or VCR/VCO fittings
Elastomers: Viton, FFKM, EPDM, Silicone
Calibration: High-accuracy or custom
Performance: Integrated potentiometer control

Valve sizing and PID tuning | Valve options

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 of 20 slpm and below
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 50 slpm and above

Accessories | Sold separately

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

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 answer any questions you may have.

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