Pressure Controllers for Closed Volumes
Dual-valve pressure controllers from Alicat eliminate the need for a bleed valve for pressure control in closed or dead-ended volumes. They are available with internal pressure sensors or remote sensors that can be plumbed to any point in your process.
Absolute or Gauge Pressure | Differential Pressure |
PCD Series Dual Valve Standard Pressure Controllers PCD3 Series Dual Valve Pressure Controllers with Remote Sensing EPCD Series OEM Dual Valve Electronic Pressure Controllers | PCD Series Dual Valve Differential Pressure Controllers |
Fluid Dispensing Using Pressure Control (PCD)
Control the pressure in the head space above the liquid to be dispensed with minimal waste of process gases.
Electronic Pressure Control with Remote Sensing (PCD3)
Accurately monitor and control the pressure in a closed volume, even when flow rates are high.
Valve Characterization in Martian Environments (PCD)
Cycle through several pressure differentials that are referenced to the simulated Martian atmosphere instead of Earth’s own atmospheric pressure.
Fluidic Dispensing for Flow Cytometry (EPCD)
High accuracy and wide usable ranges make possible the dispensing of precise amounts of fluid with your OEM instrument.
- Fast Pressure Controllers & Transducers
- Pressure Controllers for Closed Volumes
- PCD–Dual Valve Absolute and Gauge Pressure Controllers
PCD–Dual Valve Absolute and Gauge Pressure Controllers
Fast-responding pressure or vacuum control for closed volumes.
Order Directly from Alicat
Control the absolute pressure (referenced to vacuum) or gauge pressure (referenced to local barometric pressure) of gases or liquids in your process. Alicat’s PCD series dual-valve pressure controllers use two proportional valves to precisely control the pressure of gases within closed or dead-ended volumes. They achieve new setpoints rapidly and stay put, even in the face of uneven feed pressure or changing temperatures. 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. The dual-valve design incorporates a second proportional valve to exhaust excess pressure, but only when needed to maintain your setpoint. This eliminates the need to continuously bleed costly gas.
Available Ranges (see Part Numbers tab for stock ranges)
- Absolute pressure ranges (referenced to vacuum)
- PCD: max 0-3000 psia, min 0-10 torr
- PCDS: max 0-3000 psia, min 0-30 psia
- Gauge pressure ranges (referenced to atmosphere)
- PCD: max 0*-3000 psig, min 0*-2 inH2Og
- PCDS: max 0*-3000 psig, min 0*-5 psig
- *Negative gauge pressure readings (to -15 psig) can also be included in gauge ranges.
Performance
- Operating range (Turndown ratio): 200:1
- Standard accuracy calibration, NIST-traceable: +/- 0.25% of the full-scale range
- Optional high-accuracy calibration, NIST-traceable: +/- 0.125% of the full-scale range
- Repeatability: 0.08% of the full-scale range
- Typical control response time constant: 50-100 ms (as low as 25 ms with PID tuning, dependent upon line sizing and the volumes and pressures involved)
- No warm-up time required
Operating Conditions
- Compatible gas media: all non-corrosive gases (PCD/PCDS). Liquids and corrosive gases require an S-series device (PCDS).
- Operating temperature: -10°C to +60°C
- Burst pressure: 3 X Full Scale (1.5 X Full Scale for ranges >500 psi)
In the Box
- Dual-valve pressure controller (power supply sold separately)
- NIST-traceable calibration certificate
- Alicat operating manual
Model Variations
- External pressure sensor configuration (PCD-EXTSEN)
- Remote pressure sense port (PCD3)
- Aggressive gases (PCDS)
Also available:
- Single valve configuration for closed volumes (PC)
External Pressure Sensor Configuration (PCD-EXTSEN)
If you would to like to use your own vacuum or pressure sensor, the PCD-EXTSEN pressure controller is built without an internal pressure sensor. Instead, it connects electronically to a customer-supplied external pressure or vacuum transducer via the dedicated industrial sensor connector (ISC) located on top of the pressure controller. This configuration is especially useful for vacuum coating processes.
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
Liquids and Corrosive Gases (PCDS series)
Instruments in the standard PCD series are also available with an optional “S” configuration (PCDS) for use with liquids and corrosive gases. In this configuration, we upgrade the valves to 303 stainless steel, the sensor to 316L stainless steel and the elastomers to FFKM. Some corrosive gases require 316L stainless steel throughout the flow path, and in this case we can upgrade both the valves (type PCA) and flow body to 316L for full-scale flow ranges of 20 slpm or less.
Build 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)
Performance Options
- Integrated potentiometer control
- High-accuracy or custom calibration
Alicat’s PCD series uses small proportional valves for control at lower flow rates and is suitable for use with non-corrosive gases.
Absolute Pressure:
PCD-10TORRA-D (IVC for vacuum)
PCD-100TORRA-D (IVC for vacuum)
PCD-15PSIA-D
PCD-30PSIA-D
PCD-100PSIA-D
PCD-500PSIA-D
PCD-1000PSIA-D
PCD-1500PSIA-D
PCD-2000PSIA-D
PCD-3000PSIA-D
Gauge Pressure:
PCD-2INH2OG-D
PCDAS-1PSIG-D
PCD-1PSIG-D
PCD-5PSIG-D
PCD-15PSIG-D
PCD-30PSIG-D
PCD-100PSIG-D
PCD-500PSIG-D
PCD-1000PSIG-D
PCD-1500PSIG-D
PCD-2000PSIG-D
PCD-3000PSIG-D
Alicat’s PCDP series offers the largest orifice in a small valve format and is suitable for use with non-corrosive gases.
Absolute Pressure:
PCDP-15PSIA-D
PCDP-30PSIA-D
PCDP-100PSIA-D
Gauge Pressure:
PCDP-2INH2OG-D
PCDPAS-1PSIG-D
PCDP-1PSIG-D
PCDP-5PSIG-D
PCDP-15PSIG-D
PCDP-30PSIG-D
PCDP-100PSIG-D
Alicat’s PCDH series pairs two small valves working side-by-side as one and is suitable for use with non-corrosive gases.
Absolute Pressure:
PCDH-15PSIA-D
PCDH-30PSIA-D
PCDH-100PSIA-D
PCDH-500PSIA-D
Gauge Pressure:
PCDH-2INH2OG-D
PCDHAS-1PSIG-D
PCDH-1PSIG-D
PCDH-5PSIG-D
PCDH-15PSIG-D
PCDH-30PSIG-D
PCDH-100PSIG-D
PCDH-500PSIG-D
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.
Absolute Pressure:
PCRD-10TORRA-D (IVC for vacuum)
PCRD-100TORRA-D (IVC for vacuum)
PCRD-15PSIA-D
PCRD-30PSIA-D
PCRD-100PSIA-D
PCRD-500PSIA-D
Gauge Pressure:
PCRD-2INH2OG-D
PCRDAS-1PSIG-D
PCRD-1PSIG-D
PCRD-5PSIG-D
PCRD-15PSIG-D
PCRD-30PSIG-D
PCRD-100PSIG-D
PCRD-500PSIG-D
Alicat’s PCDS series uses small proportional valves for control at lower flow rates and is suitable for use with liquids and corrosive gases.
Absolute Pressure:
PCDS-30PSIA-D
PCDS-100PSIA-D
PCDS-500PSIA-D
PCDS-1000PSIA-D
PCDS-1500PSIA-D
PCDS-2000PSIA-D
PCDS-3000PSIA-D
Gauge Pressure:
PCDS-5PSIG-D
PCDS-15PSIG-D
PCDS-30PSIG-D
PCDS-100PSIG-D
PCDS-500PSIG-D
PCDS-1000PSIG-D
PCDS-1500PSIG-D
PCDS-2000PSIG-D
PCDS-3000PSIG-D
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.
Absolute Pressure:
PCDHS-30PSIA-D
PCDHS-100PSIA-D
PCDHS-500PSIA-D
Gauge Pressure:
PCDHS-5PSIG-D
PCDHS-15PSIG-D
PCDHS-30PSIG-D
PCDHS-100PSIG-D
PCDHS-500PSIG-D
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.
Absolute Pressure:
PCRDS -30PSIA-D
PCRDS -100PSIA-D
PCRDS -500PSIA-D
Gauge Pressure:
PCRDS -5PSIG-D
PCRDS -15PSIG-D
PCRDS -30PSIG-D
PCRDS -100PSIG-D
PCRDS -500PSIG-D
Fluid Dispensing Using Pressure Control
Establish precise control of fluid dispensing by controlling the pressure in the head space above the liquid. The dual-valve pressure controller maintains a constant pressure in the head space with minimal outgassing of excess gases.
- Fast Pressure Controllers & Transducers
- Pressure Controllers for Closed Volumes
- PCD3–Dual Valve Absolute and Gauge Pressure Controllers with Remote Sensing
PCD3–Dual Valve Absolute and Gauge Pressure Controllers with Remote Sensing
Closed-volume pressure or vacuum control, anywhere you need it
Order Directly from Alicat
Measure absolute or gauge pressure at any point in your closed process volume, and control flow at a different point to ensure your pressure stays on target. Alicat’s PCD3 series dual-valve pressure controllers use two proportional valves to precisely control the pressure of gases within dead-ended volumes and physically isolates the pressure sensor from the valve and flow path so that you can control pressure exactly where you need it. This allows pressure control in areas where you cannot easily install a full pressure controller and reduces the effects of flow-induced pressure changes in high-flow applications. 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. The dual-valve design incorporates a second proportional valve to exhaust excess pressure, but only when needed to maintain your setpoint. This eliminates the need to continuously bleed costly gas. Plumb the pressure sense port wherever you need to control pressure.
Available Ranges
- Absolute pressure ranges (referenced to vacuum)
- PCD3: max 0-3000 psia, min 0-10 torr
- PCD3S: max 0-3000 psia, min 0-30 psia
- Gauge pressure ranges (referenced to atmosphere)
- PCD3: max 0*-3000 psig, min 0*-2 inH2Og
- PCD3S: max 0*-3000 psig, min 0*-5 psig
- *Negative gauge pressure readings (to -15 psig) can also be included in gauge ranges.
Performance
- Operating range (Turndown ratio): 200:1
- Standard accuracy calibration, NIST-traceable: +/- 0.25% of the full-scale range
- Optional high-accuracy calibration, NIST-traceable: +/- 0.125% of the full-scale range
- Repeatability: 0.08% of the full-scale range
- Typical control response time constant: 50-100 ms (as low as 25 ms with PID tuning, dependent upon line sizing and the volumes and pressures involved)
- No warm-up time required
Operating Conditions
- Compatible gas media: all non-corrosive gases (PCD3/PCD3S). Liquids and corrosive gases require an S-series device (PCD3S).
- Operating temperature: -10°C to +60°C
- Burst pressure: 3x the full-scale range
In the Box
- Dual-valve pressure controller (power supply sold separately)
- NIST-traceable calibration certificate
- Alicat operating manual
Model Variations
- Aggressive gases (PCD3S, see below)
Also available:
- Integrated pressure sensor (PCD)
- Single valve configuration for flowing processes (PC3)
Valve Options
Your pressure controller may be customized with one of the following valving options to ensure optimal performance under your expected process conditions.
- PCD3 – small proportional control valves for flow ranges of 20 slpm and below
- PCD3 with PCA designation – high-performance proportional control valves used for applications with higher pressures
- PCDP3 – small proportional control valves with the largest orifice (not available for corrosive configurations)
- PCDH3 – hammerhead configuration, which pairs two small valves working side-by-side as one valve at each of the two valve positions
- PCRD3 – nearly frictionless large Rolamite proportional valves for flow rates of 50 slpm and above
Liquids and Corrosive Gases (PCD3S series)
Instruments in the standard PCD3 series are also available with an optional “S” configuration (PCD3S) for use with liquids and corrosive gases. In this configuration, we upgrade the valves to 303 stainless steel, the sensor to 316L stainless steel and the elastomers to FFKM. Some corrosive gases require 316L stainless steel throughout the flow path, and in this case we can upgrade both the valves (type PCA) and flow body to 316L for full-scale flow ranges of 20 slpm or less.
Build 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)
Performance Options
- Integrated potentiometer control
- High-accuracy or custom calibration
Alicat’s PCD3 series uses small proportional valves for control at lower flow rates and is suitable for use with non-corrosive gases.
Absolute Pressure:
PCD3-10TORRA-D (IVC for vacuum)
PCD3-100TORRA-D (IVC for vacuum)
PCD3-15PSIA-D
PCD3-30PSIA-D
PCD3-100PSIA-D
PCD3-500PSIA-D
PCD3-1000PSIA-D
PCD3-1500PSIA-D
PCD3-2000PSIA-D
PCD3-3000PSIA-D
Gauge Pressure:
PCD3-2INH2OG-D
PCD3AS-1PSIG-D
PCD3-1PSIG-D
PCD3-5PSIG-D
PCD3-15PSIG-D
PCD3-30PSIG-D
PCD3-100PSIG-D
PCD3-500PSIG-D
PCD3-1000PSIG-D
PCD3-1500PSIG-D
PCD3-2000PSIG-D
PCD3-3000PSIG-D
Alicat’s PCDP3 series offers the largest orifice in a small valve format and is suitable for use with non-corrosive gases.
Absolute Pressure:
PCDP3-15PSIA-D
PCDP3-30PSIA-D
PCDP3-100PSIA-D
Gauge Pressure:
PCDP3-2INH2OG-D
PCDP3AS-1PSIG-D
PCDP3-1PSIG-D
PCDP3-5PSIG-D
PCDP3-15PSIG-D
PCDP3-30PSIG-D
PCDP3-100PSIG-D
Alicat’s PCDH3 series pairs two small valves working side-by-side as one and is suitable for use with non-corrosive gases.
Absolute Pressure:
PCDH3-15PSIA-D
PCDH3-30PSIA-D
PCDH3-100PSIA-D
PCDH3-500PSIA-D
Gauge Pressure:
PCDH3-2INH2OG-D
PCDH3AS-1PSIG-D
PCDH3-1PSIG-D
PCDH3-5PSIG-D
PCDH3-15PSIG-D
PCDH3-30PSIG-D
PCDH3-100PSIG-D
PCDH3-500PSIG-D
Alicat’s PCRD3 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.
Absolute Pressure:
PCRD3-10TORRA-D (IVC for vacuum)
PCRD3-100TORRA-D (IVC for vacuum)
PCRD3-15PSIA-D
PCRD3-30PSIA-D
PCRD3-100PSIA-D
PCRD3-500PSIA-D
Gauge Pressure:
PCRD3-2INH2OG-D
PCRD3AS-1PSIG-D
PCRD3-1PSIG-D
PCRD3-5PSIG-D
PCRD3-15PSIG-D
PCRD3-30PSIG-D
PCRD3-100PSIG-D
PCRD3-500PSIG-D
Alicat’s PCDS series uses small proportional valves for control at lower flow rates and is suitable for use with liquids and corrosive gases.
Absolute Pressure:
PCD3S-30PSIA-D
PCD3S-100PSIA-D
PCD3S-500PSIA-D
PCD3S-1000PSIA-D
PCD3S-1500PSIA-D
PCD3S-2000PSIA-D
PCD3S-3000PSIA-D
Gauge Pressure:
PCD3S-5PSIG-D
PCD3S-15PSIG-D
PCD3S-30PSIG-D
PCD3S-100PSIG-D
PCD3S-500PSIG-D
PCD3S-1000PSIG-D
PCD3S-1500PSIG-D
PCD3S-2000PSIG-D
PCD3S-3000PSIG-D
Alicat’s PCDH3S 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.
Absolute Pressure:
PCDH3S-30PSIA-D
PCDH3S-100PSIA-D
PCDH3S-500PSIA-D
Gauge Pressure:
PCDH3S-5PSIG-D
PCDH3S-15PSIG-D
PCDH3S-30PSIG-D
PCDH3S-100PSIG-D
PCDH3S-500PSIG-D
Alicat’s PCRD3S 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.
Absolute Pressure:
PCRD3S-30PSIA-D
PCRD3S-100PSIA-D
PCRD3S-500PSIA-D
Gauge Pressure:
PCRD3S-5PSIG-D
PCRD3S-15PSIG-D
PCRD3S-30PSIG-D
PCRD3S-100PSIG-D
PCRD3S-500PSIG-D
Electronic Pressure Control with Remote Sensing
When flow rates entering or leaving a closed volume are high, flow-induced pressure drop can cause inaccurate pressure measurements. The PCD3’s remote sense port accurately monitors the pressure in the closed volume, no matter the flow rate.
- Fast Pressure Controllers & Transducers
- Pressure Controllers for Closed Volumes
- PCD–Dual Valve Differential Pressure Controllers
PCD–Dual Valve Differential Pressure Controllers
Closed-volume differential pressure control
Order Directly from Alicat
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.
Available Ranges (see Part Numbers tab for stock ranges)
- PCD: max -100 to +100 psid, min -2 inH2Od to +2 inH2Od
- PCDS: max -100 to +100 psid, min -5 to +5 psid
Performance
- Turndown ratio: 200:1
- Standard accuracy calibration, NIST-traceable: +/- 0.25% of the full-scale range
- Optional high-accuracy calibration, NIST-traceable: +/- 0.125% of the full-scale range
- Repeatability: 0.08% of the full-scale range
- Typical control response time constant: 50-100 ms (as low as 25 ms with PID tuning, dependent upon line sizing and the volumes and pressures involved)
- No warm-up time required
Operating Conditions
- Compatible gas media: all non-corrosive gases (PC/PCS). Liquids and corrosive gases require an S-series device (PCS).
- Operating temperature: -10°C to +60°C
- Burst pressure: 3x the full-scale range
- Common Mode Pressure: 150 psig
In the Box
- Dual-valve pressure controller (power supply sold separately)
- NIST-traceable calibration certificate
- Alicat operating manual
Model Variations
- Aggressive gases (PCDS, see below)
Also available:
- Single valve configuration for flowing processes (PC)
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
Liquids and Corrosive Gases (PCDS series)
Instruments in the standard PCD series are also available with an optional “S” configuration (PCDS) for use with liquids and corrosive gases. In this configuration, we upgrade the valves to 303 stainless steel, the sensor to 316L stainless steel and the elastomers to FFKM. Some corrosive gases require 316L stainless steel throughout the flow path, and in this case we can upgrade both the valves (type PCA) and flow body to 316L for full-scale flow ranges of 20 slpm or less.
Build 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)
Performance Options
- Integrated potentiometer control
- High-accuracy or custom calibration
Alicat’s PCD series uses small proportional valves for control at lower flow rates and is suitable for use with non-corrosive gases.
Differential Pressure:
PCD-2INH2OD-D
PCDAS-1PSID-D
PCD-1PSID-D
PCD-5PSID-D
PCD-15PSID-D
PCD-30PSID-D
PCD-100PSID-D
Alicat’s PCDP series offers the largest orifice in a small valve format and is suitable for use with non-corrosive gases.
Differential Pressure:
PCDP-2INH2OD-D
PCDPAS-1PSID-D
PCDP-1PSID-D
PCDP-5PSID-D
PCDP-15PSID-D
PCDP-30PSID-D
PCDP-100PSID-D
Alicat’s PCDH series pairs two small valves working side-by-side as one and is suitable for use with non-corrosive gases.
Differential Pressure:
PCDH-2INH2OD-D
PCDHAS-1PSID-D
PCDH-1PSID-D
PCDH-5PSID-D
PCDH-15PSID-D
PCDH-30PSID-D
PCDH-100PSID-D
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.
Differential Pressure:
PCRD-2INH2OD-D
PCRDAS-1PSID-D
PCRD-1PSID-D
PCRD-5PSID-D
PCRD-15PSID-D
PCRD-30PSID-D
PCRD-100PSID-D
Alicat’s PCDS series uses small proportional valves for control at lower flow rates and is suitable for use with liquids and corrosive gases.
Differential Pressure:
PCDS-5PSID-D
PCDS-30PSID-D
PCDS-100PSID-D
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.
Differential Pressure:
PCDHS-5PSID-D
PCDHS-30PSID-D
PCDHS-100PSID-D
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.
Differential Pressure:
PCRDS-5PSID-D
PCRDS-30PSID-D
PCRDS-100PSID-D
Valve Characterization in Martian Environments
To characterize a valve’s flow vs pressure curve as it would be used on Mars, Alicat’s dual-valve differential pressure controller can cycle through several pressure differentials that are all referenced to the simulated Martian atmosphere instead of Earth’s own atmospheric pressure. Plumb the downstream differential pressure port to the closed atmospheric chamber and the upstream one to the line that supplies pressure against the valve.
- Fast Pressure Controllers & Transducers
- Pressure Controllers for Closed Volumes
- EPCD–Dual Valve OEM Electronic Pressure Controllers
EPCD–Dual Valve OEM Electronic Pressure Controllers
Essential pressure control for dead-ended OEM applications
Order Directly from Alicat
Dual-valve electronic pressure controllers use two proportional valves to precisely control the pressure of gases within closed or dead-ended volumes. They are highly customizable for easy integration within original equipment manufacturer (OEM) products. Alicat’s EPCD delivers high accuracy and fast, droop-free closed-loop control in a compact, competitively-priced package.
- Repeatable. EPCD pressure regulators deliver NIST-traceable accuracy, reliable control and adjustable PID valve tuning to keep your product operation repeatable.
- Efficient. Waste no more. The dual-valve design incorporates a second proportional valve to release excess pressure, which eliminates the need to continuously bleed costly gas.
- Configurable. We can customize the valves, ports, sensors and communications to precisely suit your product design and application requirements.
Available Ranges
- Absolute pressure ranges (referenced to vacuum)
- EPC: max 0-300 psia, min 0-15 psia
- Gauge pressure ranges (referenced to atmosphere)
- EPC: max 0*-300 psig, min 0*-2 inH2Og
- *Negative gauge pressure readings (to -15 psig) can also be included in gauge ranges.
Performance
- Turndown ratio: 200:1
- Calibration accuracy, NIST-traceable: +/- 0.125% of the full-scale range
- Repeatability: 0.05% of the full-scale range
- Typical control response time constant: 100 ms (dependent upon line sizing and the volumes and pressures involved)
- No warm-up time required
Operating Conditions
- Compatible gas media: all non-corrosive gases.
- Operating temperature: -10°C to +60°C
- Burst pressure: 3x the full-scale range
In the box
- Dual-valve electronic pressure controller
- NIST-traceable calibration certificate
- Alicat operating manual
Build Options
- Analog signals (0-5v, 1-5v, 0-10v, 4-20mA)
- Digital communications protocols (RS-232, RS-485, Modbus-RTU)
- Process connections (NPT, SAE, downport, NeSSI)
Absolute Pressure:
EPCD-15PSIA
EPCD-30PSIA
EPCD-100PSIA
EPCD-300PSIA
Gauge Pressure:
EPCD-2INH2OG
EPCD-4INH2OG
EPCD-10INH2OG
EPCD-20INH2OG
EPCD-1PSIG
EPCD-5PSIG
EPCD-15PSIG
EPCD-30PSIG
EPCD-100PSIG
EPCD-300PSIG
Fluidic Dispensing for Flow Cytometry
Dual-valve EPCDs control the head space pressures to propel the sheath fluid and the cellular sample through the flow cytometer’s laser. High EPCD accuracy and wide usable ranges make possible the dispensing of precise amounts of fluid.