Series DA/DS Bourdon Tube Pressure Switches
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Brand:DWYER
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Wetted Materials:Brass, 403 SS, or 316 SS.
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Temperature Limit:180°F (82°C).
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Pressure Limit:Maximum pressure of the operating range.
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Enclosure Rating:General purpose, weatherproof or explosion-proof.
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Repeatability:±1% of full operating range, ±1.5% on DS-7300 models.
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Switch Type:SPST mercury switch, SPDT mercury switch, SPDT snap switch, or SPDT hermetically sealed snap switch. Other circuit types available.
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Electrical Connections:Screw terminal.
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Conduit Connection:General purpose: 1/2" hole for conduit hub. Weatherproof: 1/2" conduit hub. Explosion-proof: 3/4" female NPT.
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Process Connection:General purpose and weatherproof: 1/4" male NPT; 1/2" male NPT on range 15S and 16S. Explosion-proof: 1/2" male NPT and 1/4" female NPT.
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Mounting Orientation:Vertical.
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Set Point Adjustment:Thumbscrew.
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Agency Approvals:CE, CSA, FM, UL. (mercury switch units are not CE approved). (Consult factory for FM approval models.)
Description
Customers tell us that the SERIES DA/DS are the best pressure switches made. The Mercoid D Series is one of the world’s broadest lines of pressure switches. The D Series has extremely high sensitivity and great repeatability. The DA Models are equipped with two external adjustments, one for setting high pressure operating point, the other for setting low pressure operating point. Deadband, the difference between high and low setpoints, is adjustable over the full-scale. The DS Models are equipped with a single external adjustment for setting operating point only. For mercury-free switches, choose between the snap action switch or hermetically sealed snap action switch. Hermetically sealed mercury switch also available.
Product Applications:
- Compressors
- Mechanical HVAC or process equipment
- Pump control
