Alicat Scientific PCD Specifications
Technical Data for PCD, PCD3, PCRD, and PCRD3
Dual Valve Pressure Controllers
Alicat’s PCD and PCRD Dual Valve Pressure Controllers accurately and eciently control pressure
within a closed system with a minimum loss of expensive gases through the exhaust process.
PCRD-Series pressure controllers are best for ows greater than 20 lpm.
PCD3 and PCRD3-Series pressure controllers are tted with an external pressure port for sensing and controlling pressures at a
remote point in the system. PCDP controllers are for pressure ow (< 80 psig inlet).
Standard Specications (Contact Alicat for available options.)
Performance PCD & PCD3 Controllers PCRD & PCRD3 Controllers
Full scale pressure < 2” H2O Accuracy Consult Factory
Full scale pressure ≥ 2” H2O Standard Accuracy ± 0.30%
Full scale pressure ≥ 1” H2O
High Accuracy Option
Repeatability ± 0.08% Full Scale
Zero Shift and Span Shift 0.02% Full Scale / ºCelsius
Operating Range / Turndown Ratio 0.5% to 100% Full Scale / 200:1 Turndown
Excess Pressure 102.4% FS Controllable
Burst Pressure 3 X Full Scale (1.5 X Full Scale for ranges >500 psi)
Typical Response Time
Warm-up Time < 1 Second
1. Volumes, feed pressures, exhaust pressures and line sizing will determine the limits of response times.
Operating Conditions PCD & PCD3 Controllers PCRD & PCRD3 Controllers
Gas Compatibility
Operating Temperature -10 to +60 ºCelsius
Common Mode Pressure
(Dierential Pressure Units Only)
Mounting Attitude Sensitivity None Mount with valve cylinders vertical & upright
Valve Type Normally Closed
Ingress Protection IP40
Wetted Materials
1. For aggressive gases, please see our PCDS and PCRDS-Series pressure controllers. For use with water or other liquids please contact Alicat
Communication / Power PCD & PCD3 Controllers PCRD & PCRD3 Controllers
Monochrome LCD or Color TFT Display with
integrated touchpad
Digital Input / Output Signal1 Options
Analog Input / Output Signal2 Options
Optional Secondary Analog Input/Output Signal
Electrical Connection Options 8 Pin Mini-DIN / 9-pin D-sub (DB9) / 15-pin D-sub (DB15) / 6 pin locking / 8pin M12
Supply Voltage 12-30 Vdc (15-30 Vdc for 4-20 mA outputs) 24-30 Vdc
Supply Current 0.250 Amp 0.750 Amp
1. The Digital Output Signal communicates Pressure
2. The Analog Output Signal and Optional Secondary Analog Output Signal communicate Pressure
1
PCD: 303 & 302 Stainless Steel, Viton®, Heat Cured Silicone Rubber, Glass Reinforced Polyphenylene
Sulde, Heat Cured Epoxy, Aluminum, Gold, Brass, 430FR Stainless Steel, Silicon, Glass.
PCRD: 303 & 302 Stainless Steel, Viton®, Heat Cured Silicone Rubber, Glass Reinforced Polyphenylene Sulde, Heat Cured Epoxy, Aluminum, Gold, 416 Stainless Steel, Silicon, Glass.
If your application demands a dierent material, please contact Alicat.
RS-232 Serial / RS-485 Serial / Modbus RTU / PROFIBUS / EtherNet/IP / DeviceNet /
2
± 0.125% (available only on 1 psig or higher ranges)
100 ms (Adjustable)
Compatible with all non-corrosive gases
150 psig
Displays Pressure
Modbus TCP/IP / EtherCAT
0-5 Vdc / 1-5 Vdc / 0-10 Vdc / 4-20 mA
0-5 Vdc / 1-5 Vdc / 0-10 Vdc / 4-20 mA
Range Specic Specications
Dual Valve Controllers
PCD & PCD3 All Standard Ranges 4.1”H x 4.8”W x 1.1”D 1/8” NPT Female
PCDP All Standard Ranges 4.4”H x 5.2”W x 1.6”D 1/4” NPT Female
PCRD & PCRD3 All Standard Ranges 5.5”H x 10.6”W x 2.3”D 3/4” NPT Female
1. See drawings for metric equivalents.
2. Compatible with Swagelok® tube, Parker®, face seal, push connect and compression adapter ttings. VCR and SAE connections upon request.
Mechanical Dimensions
Standard Available Ranges
PCD, PCD3, PCRD and PCRD3 Pressure Controllers
-15 psig to 0 psig
2 inH2OD 2 inH2OG
1 psid 1 psig
5 psid 5 psig
15 psid 15 psig 15 psia
30 psid 30 psig 30 psia
100 psid 100 psig 100 psia
500 psig 500 psia
1000 psig 1000 psia
1500 psig 1500 psia
2000 psig 2000 psia
3000 psig 3000 psia
Other ranges available. Please contact Alicat.
DOC-SPECS-PCD Rev.9 1 February 16, 2018
Absolute Gauge Dierential Notes
PaA PaG PaD pascal
hPaA hPaG hPaD hectopascal
kPaA kPaG kPaD kilopascal
MPaA MPaG MPaD megapascal
mbarA mbarG mbarD millibar
barA barG barD bar
g/cm2A g/cm2G g/cm2D gram force per square centimeter
kg/cmA kg/cmG kg/cmD kilogram force per square centimeter
PSIA PSIG PSID pound force per square inch
PSFA PSFG PSFD pound force per square foot
mTorrA mTorrG mTorrD millitorr
torrA torrG torrD torr
mmHgA mmHgG mmHgD millimeter of mercury at 0 C
inHgA inHgG inHgD inch of mercury at 0 C
mmH2OA mmH2OG mmH2OD millimeter of water at 4 C (NIST conventional)
mmH2OA mmH2OG mmH2OD millimeter of water at 60 C
cmH2OA cmH2OG cmH2OD centimeter of water at 4 C (NIST conventional)
cmH2OA cmH2OG cmH2OD centimeter of water at 60 C
inH2OA inH2OG inH2OD inch of water at 4 C (NIST conventional)
inH2OA inH2OG inH2OD inch of water at 60 C
atm atmosphere
m asl meter above sea level (only in /ALT builds)
ft asl foot above sea level (only in /ALT builds)
* Note that only units appropriate to your device will be available for selection.
1
Available Units*
www.alicat.com/pressure
1
Process Connections
Tel: 888-290-6060
2
PCD-Series
DATE
12/12/2015
13.34mm
.525in
8.89mm
.350in
26.67mm
1.050in
121.92mm
4.800in
8.89mm
.350in
2.769in
70.32mm
103.30mm
4.067in
1/8 NPT
1/6/20 16
REV.
DATE
23.50mm
.925in
3.438in
87.31mm
1.363in
34.61mm
.125in
3.18mm
2X 8-32 UNC .350in 8.89mm
13.335mm
.525in
.350in
8.890mm
Both Sides
1/8 NPT
103.30mm
4.067in
52.82mm
2.080in
.350in
8.89mm
69.10mm
2.721in
2X 1/8 NPT
DATE
REV.
1/6/20 16
8.89mm
.350in
13.34mm
.525in
1/8 NPT
Both Sides
26.67mm
1.050in
121.92mm
4.800in
8.89mm
.350in
13.34mm
.525in
3.18mm
.125in
1.363in
34.61mm
3.438in
87.31mm
23.50mm
.925in
1/8 NPT
8.89mm
.350in
52.82mm
2.080in
All standard ranges
Tel: 888-290-6060
www.alicat.com/pressure
PCD-Series
Dierential Pressure
All standard ranges
PCDP-Series
All standard ranges
40.64mm
1.600in
131.83mm
5.190in
12.70mm
.500in
20.32mm
.800in
2X 8-32 UNC 8.89mm .350in
12.70mm
1/4 NPT
Both Sides
.500in
1/4 NPT
75.76mm
2.983in
81.79mm
3.220in
DOC-SPECS-PCD Rev.9 2 February 16, 2018
110.92mm
4.367in
50.04mm
1.970in
4.45mm
.175in
36.20mm
1.425in
12.70mm
.500in
20.32mm
.800in
Loading...