DWYER INSTRUMENTS 1638-0 Large Diaphragm Pressure Switch
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Product Specifications:
| Item | Pressure Switch |
| Application | Air Conditioning, Duct Heater Control |
| Contact Form | SPDT |
| Electrical Connection | 3 Screw Type, Common, Normally Open, Normally Closed |
| Electrical Connection Type | Screw Terminals |
| Electrical Rating | 1/4 Hp @ 250V AC, 60 Hz, 15A @ 120 to 480V AC, 60 Hz, Resistive 1/8 Hp @ 125V AC |
| Enclosure Rating | EXP, GP, WP |
| For Pressure Type | Differential |
| Housing Material | Steel |
| Housing Type | Conduit Box |
| Maximum Operating Temperature | 110°F |
| Maximum Pressure Rating | 10 psig |
| Minimum Operating Temperature | -30°F |
| Mounting Hole Center To Center Distance | 3" |
| Mounting Hole Diameter | 5/16" |
| Mounting Orientation | Vertical |
| Number Of Switches | 1 |
| Operating Temp. Range | -30°F to +110°F |
| Overall Depth | 3 1/8" |
| Overall Height | 6 1/2" |
| Overall Width | 5 7/8" |
| Power Requirement | 15A At 120-480V AC |
| Pressure Range | 0.05 in. wc to 0.25 in. wc |
| Pressure Set Point | 0.05 in. wc to 0.25 in. wc |
| Product Type | Differential Pressure Switch |
| Sample Line Connection Size | 1/8" |
| Sample Line Connection Type | NPT |
| Sample Line Connector Type | NPT |
| Switch Voltage | 120-480/125/250v ac |
| Switching Differential | 0.05 in. wc |
| Type Of Set Point | Adjustable |
Shipping Info:
| Ship weight (kg) | 2.7 |
| Ship height (cm) | 16.51 |
| Ship length (cm) | 7.94 |
| Ship width (cm) | 14.92 |
| Country of Origin | US |
Product Details:
The Dwyer 1620 Series switch design is best where highest precision combined with diaphragm sealed leak proof construction and mounting simplicity are required. Model 1626 and 1627 differential pressure switches are identical in design and construction except that Model 1626 has a single electric switch and Model 1627 has dual electric switches. Model 1627 can therefore provide dual control when required. It can be set to open or close two independent electrical circuits, each preset for its own actuation pressure. Both units have diaphragm sealed motion take outs providing maximum protection against leakage. CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.
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