Low Differential Pressure Switches for General Industrial Service- Series 1800
Compact ecomonically priced switches in 8 standard ranges. Set points from 0.07' to 85" W.C.
One of our most popular pressure switches. Combines small size and low price with 2% repeatability for enough accuracy for all but the most demanding applications. Set point adjustment inside the mounting stud permits mounting switch on one side of a wall or panel with adjustment easily accessible on the opposite side. U.L. and C.S.A. listed, F.M. approved.
A-389 Mounting bracket (optional) is 16 ga. steel, zinc plated, dichromate dipped for corrosion resistance. Provides rugged, permanent mounting and speeds installation.
Environmental (MIL) Construction. Unlisted Model 1820 can be furnished with a special snap switch sealed against the environment for high humidity, exposure to fungus, and/or for military applications. Similar to Model 1823 except dead band is slightly greater and some lower set points may not be available. Specify Model 1820--(Range No.)--"MIL" and required set point in ordering
Weatherproof housing 16-ga. steel enclosure for unusually wet or oily conditions. Withstands 200 hour salt spray test. Gasketed cover. Wt. 51/2 Ibs. Switch must be in- stalled at factory. Specify "WP" after model number. Rated NEMA4.
Explosion-proof Housing Cast iron base with aluminum cover. Wt. 71/2 Ibs. Switch must be installed at factory. Specify suffix EXPL after model number. Rated NEMA 7&9; CI I, GrD, CI II,GroupsE,F8G,CI III.
| Temperature limits: | -30°F for dry air or gas to 180°F. 1823-00, -20 to 180°F. |
|---|---|
| Maximum surge pressure: | 25 psig. |
| Rated pressure: | 10 psig. |
| Pressure connections: | 1/8" NPT. |
| Electrical rating: | 15 amps, 120-480 volts, 60 Hz. A.C. Resistive 1/8 H.P. @ 125 volts, 1/4 H.P. @ 250 volts, 60 Hz A.C. Derate to 10 amps for operation at high cycle rates. |
| Wiring connections: | 3 screw type, common, normally open and normally closed. |
| Set point adjustment: | Screw type inside mounting spud. |
| Housing: | Aluminum die casting. Steel fittings zinc plated, dichromate dipped for 200 hour salt spray test. Diaphragm: Molded silicone rubber with aluminum support plate. |
| Calibration Spring: | Stainless steel. |
| Mounting spud: | 1/2" pipe thread. |
| Weight: | 1 lb., 5 oz. |
| Installation: | Diaphragm vertical. |
CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.
| Model Number |
Operating Range Inches, W.C. |
Approximate Dead Band |
|
|---|---|---|---|
| At Min. Set Point |
At Max. Set Point |
||
| 1823-00 1823-0 1823-1 1823-2 1823-5 1823-10 1823-20 1823-40 1823-80 |
0.07 to 0.22 0.15 to 0.5 0.3 TO 1.0 0.5 to 2.0 1.5 to 5.0 2.0 to 10 3 to 22 5 to 44 9 to 85 |
0.05 0.06 0.08 0.10 0.14 0.18 0.35 0.56 1.3 |
0.05 0.06 0.08 0.12 0.28 0.45 0.70 1.1 3.0 |
SUGGESTED SPECIFICATIONS
Differential pressure switches shall be diaphragm operated with 4" diaphragm to actuate a single pole double throw snap switch. Motion of the diaphragm shall be restrained by a calibrated spring that can be adjusted to set the exact pressure differential at which the electrical switch will be actuated. Motion of the diaphragm shall be transmitted to the switch button by means of a direct mechanical linkage. Switches shall be Dwyer Instruments, Inc. Catalog No. 1823- for the required operating ranges.