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Clark Solutions
1950 Series Explosion-Proof Differential Pressure Switches
Set points from 0.07" to 85" W.C. Repetitive accuracy within 2%.
DESCRIPTION
Model 1950 Explosion-Proof Differential Pressure Switch combines the best features of the popular series 1900 with an integral explosion-proof and weather-proof housing, making it an exceptional value for either application. It is C.E., U.L. and C.S.A. Listed, F.M. approved for use in Class I Groups C and D, Class II Groups E, F, and G and Class III hazardous atmospheres (NEMA 7 & 9). Weather-proof features include a drain plug and O-ring seal in cover. Electrical connections are easily made by removing front cover. For convenience the set point adjustment screw is located on the outside of the housing. Twelve models offer set points from 0.03 to 209 (0.8 to 508 mm) w.c. and from 0.5 to 50 psi (3.4 to 345 kPa). The unit is very light and compact, about half the weight and bulk of other explosionproof or weather-proof switches with separate enclosures.
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SPECIFICATIONS
Temperature Limits: -40°F to 140°F (-40°C to
60°C). 0°F to 140°F (-18°C to 60°C) for
1950P-8,15, 25, and 50. -30°F to 130°F (-
34°C to 54°C) for 1950-02
Maximum Surge Pressure: 1950-10 psi (0.7
bar),1950P - 50 psi (3.4 bar) 1950P-50 only -
90 psi (6.2 bar)
Rated Pressure:1950 - 45" (0.1 bar) w.c., 1950P
-35 psi (2.4 bar), 1950P-50 only - 70 psi
(4.8 bar)
Pressure Connection: 1/8" NPT(F).
Electrical Rating: 15 amps, 125, 250, 480 volts,
60 Hz. AC. Resistive,1/8 H.P. @125 volts,1/4
H.P.@ 250 volts, 60 Hz. A.C.
Wiring Connections: 3 screw type; common,
norm. open and normally closed.
Conduit Connection: 1/2" NPT(F).
Set Point Adjustment: Screw type on top of
housing. Field adjustable.
Housing: Anodized cast aluminum.
Diaphragm: Molded fluorosilicone rubber. ‘-02
model, silicone on nylon.
Calibration Spring: Stainless steel.
Installation: Mount with diaphragm in vertical
position.
Weight: 3 1/4 Ibs. (1.5 kg), ‘- 02 model,
4 lbs., 7oz. (2 kg)
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ORDERING INFORMATION
| FOR YOUR CONVENIENCE, THESE ITEMS ARE AVAILABLE ONLINE |
| Model |
Operating Range, in w.c. |
Approximate Dead Band |
| Min Set |
Max Set |
| 1950-02-2S |
.03 to .10 |
.025 |
.05 |
| 1950-00-2F |
.07 to .15 |
.04 |
.05 |
| 1950-0-2F |
.15 to .50 |
.10 |
.15 |
| 1950-1-2F |
.4 to 1.6 |
.15 |
.20 |
| 1950-5-2F |
1.4 to 5.5 |
.30 |
.40 |
| 1950-10-2F |
3 to 11 |
.40 |
.50 |
| 1950-20-2F |
4 to 20 |
.40 |
.60 |
| PLEASE CALL 1-800-253-2497 TO ORDER THESE ITEMS |
| Model |
Operating Range, in w.c. |
Approximate Dead Band |
| Min Set |
Max Set |
| 1950-02-2S |
.03 to .10 |
.025 |
.05 |
| 1950-00-2F |
.07 to .15 |
.04 |
.05 |
| 1950-0-2F |
.15 to .50 |
.10 |
.15 |
| 1950-1-2F |
.4 to 1.6 |
.15 |
.20 |
| 1950-5-2F |
1.4 to 5.5 |
.30 |
.40 |
| 1950-10-2F |
3 to 11 |
.40 |
.50 |
| 1950-20-2F |
4 to 20 |
.40 |
.60 |
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Operating Range, PSID |
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| 1950P-2-2F |
0.5 to 2 |
.3 |
.3 |
| 1950P-8-2F |
1.5 to 8 |
1.0 |
1.0 |
| 1950P-15-2F |
3 to 15 |
.9 |
.9 |
| 1950P-25-2F |
4 to 25 |
.7 |
.7 |
| 1950P-50-2F |
15 to 50 |
1.0 |
1.5 |
CAUTION: For use only with air or compatible gases. Applications with hazardous atmospheres and a single positive pressure may require special venting.
Patent No. 3,566,060
Natural Gas Compatibility- Model 1950G is supplied with a Buna-N diaphragm for natural gas service.
Ranges available are from 0.10 to 20 inches w.c. Consult us for specification details.
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