DA-7021-153-9AS | Pressure switch | 403SS Bourdon tube | range 40-350 psig | 30 psig min. deadband. | Dwyer
Pressure switch, 403SS Bourdon tube, range 40-350 psig, 30 psig min. deadband.
Documents and manuals
Dwyer DA-7021-153-9AS Documents
Overview
Details for DA-7021-153-9AS
Pressure switch | 403SS Bourdon tube | range 40-350 psig | 30 psig min. deadband.
SERIES DA/DS BOURDON TUBE PRESSURE SWITCHES
Customers tell us that the Series DA/DS Bourdon Tube Pressure Switches are the best pressure switches made. The Mercoid DA/DS Series is one of the world’s broadest lines of pressure switches. The DA/DS 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
- Visible calibrated dial provides an easy and fast check without having to open devicecausing dangerous conditions to operators
- On/off indication (except hermetically sealed snap switch models) gives operatorclear indication of state of switched equipment that could be located in anotherlocation
- Adjustable or fixed deadband supports control applications by reducing equipmentwear-out by unnecessary recycling
- External switch setpoint adjustments reduces set-up time
- Pressure ranges of full vacuum to 8000 psig gives application designers the ability tospecify standard equipment, simplifying install and training, and reducing servicingcosts
- UL listed, CSA approved many models FM approved to support rigorous processapplications and regulations
- General purpose, weatherproof or explosion-proof enclosures for a variety of indooror outdoor environments meeting the needs of multiple applications and uses
Specifications
- Series
- DA/DS BOURDON TUBE PRESSURE SWITCHES
- Category/Type
- Pressure
- Type
- Single Pressure
- Series
- DA/DS BOURDON TUBE PRESSURE SWITCHES
- Wetted Materials
- Brass; 403 SS; or 316 SS.
- Temperature Limit
- 180°F (82°C).
- Pressure Limit
- Maximum pressure of the operating range.
- Enclosure Rating
- General purpose; weatherproof or explosion-proof.
- Repeatability
- ±1% of full operating range; ±1.5% on DS-7300 models.
- Switch Type
- SPST mercury switch; SPDT mercury switch; SPDT snap switch.
- Electrical Rating
- See Catalog page.
- Electrical Connections
- Screw terminal.
- Conduit Connection
- General purpose: 1/2" hole for conduit hub. Weatherproof: 1/2" conduit hub. Explosion-proof: 3/4" female NPT.
- 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.
- Mounting Orientation
- Vertical.
- Set Point Adjustment
- Thumbscrew.
- Weight
- General purpose: 4 lb (1.8 kg). Weatherproof: 6 lb (2.7 kg). Explosion-proof: 8 lb (3.5 kg).
- Deadband
- See Catalog page.
- Agency Approvals
- CSA; FM; UL. (Consult factory for FM approval models.)
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