| |
DWYER Series 1950 Explosion Proof Differential Pressure
Switches
|
| Compact, Low-Cost, Explosion-proof and Weatherproof |
|
|
 Model
1950 Explosion-proof Differential Pressure Switch combines
the best features of the popular Dwyer Series 1900 with an
integral explosion-proof and weatherproof housing, making
it an exceptional value for either application. It is CE,
UL and CSA listed, FM approved for use in Class I, Div 1,
Groups C and D, Class II Groups E, F, and G and Class III
hazardous atmospheres (NEMA 7 & 9). Raintight (NEMA 3).
Weatherproof 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 .03 to 20" w.c. (7.5 to 5 kPa) and from
.5 to 60 psi (0.035 to 3.5 bar). The unit is very light and
compact - about half the weight and bulk of other explosion-proof
or weatherproof switches with separate enclosures.
See
Dimensions
|
| CAUTION: For use only with air
or compatible gases. Applications with hazardous atmospheres
and a single positive pressure may require special venting. |
|
| SPECIFICATIONS |
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult Factory.
Temperature Limits: -40 to 140°F (-40 to 60°C); 0 to
140°F (-17.8 to 60°C)for 1950P-8, 15, 25, and 50. -30
to 130°F (-34.4 to 54.4°C) for 1950-02.
Pressure Limits: Continuous: 1950's - 45" w.c. (0.11 bar);
1950P's - 35 psi (2.41 bar); 1950P-50 only - 70 psi (4.83 bar).
Surge: 1950's - 10 psi (0.69 bar); 1950P's - 50 psi (3.45 bar);
1950P-50 only - 90 psi (6.21 bar).
Enclosure Rating: IP64, NEMA 3, 7 and 9.
Switch Type: Single-pole double-throw (SPDT).
Electrical Rating: 15 A @ 125, 250, 480 VAC, 60 Hz. Resistive
1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC, 60 Hz.
Electrical Connections: 3 screw type, common, normally open
and normally closed.
Process Connections: 1/8" female NPT.
Mounting Orientation: Diaphragm in vertical position. Consult
factory for other position orientations.
Set Point Adjustment: Screw type on top of housing.
Weight: 3.25 lb (1.5 kg); 1950-02 model 4.4 lb (2 kg).
Agency Approvals: CE, UL, CSA, FM. |
|
| Popular Models in Inches W. C. |
| Model Number |
Range, Inches w.c. |
Approx. Dead Band At Min. Set Point |
Approximate Dead Band At Max. Set Point |
| 1950-02 |
0.03 to 0.10 |
0.025 min |
0.05 max |
| 1950-00 |
0.07 to 0.15 |
0.04 min |
0.05 max |
| 1950-0 |
0.15 to 0.5 |
0.10 min |
0.15 max |
| 1950-1 |
0.4 to 1.6 |
0.15 min |
0.20 max |
| 1950-5 |
1.4 to 5.5 |
0.30 min |
0.40 max |
| 1950-10 |
3 to 11 |
0.40 min |
0.50 max |
| 1950-20 |
4 to 20 |
0.40 min |
0.60 max |
|
|
|
|
| Popular Models in PSID |
| Model Number |
Range, PSID |
Approx. Dead Band At Min. Set Point |
Approximate Dead Band At Max. Set Point |
| 1950P-2 |
0.5 to 2 |
0.3 min |
0.3 max |
| 1950P-8 |
1.5 to 8 |
1.0 min |
1.0 max |
| 1950P-15 |
3 to 15 |
0.9 min |
0.9 max |
| 1950P-25 |
4 to 25 |
0.7 min |
0.7 max |
| 1950P-50 |
15 to 50 |
1.0 min |
1.5 max |
|
|
|
|
|
| Previous Page |
| |
|
