Snap action contact air switches, high electrical rating

Uses: High electrical rating, for 250V. Momentary or alternate action.

Main applications: Direct actuating of pumps and blowers in spas and swimming pools, sink erasers, professional or home appliances used with risks of water splashing. Resist to spas and swimming pools ozone concentration.

Housing raw material

Electrical rating

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Voltage

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Contact style

Maximum pressure

Set point calibration (mbar)

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Description

Uses: High electrical rating, for 250V. Momentary or alternate action.

Main applications: Direct actuating of pumps and blowers in spas and swimming pools, sink erasers, professional or home appliances used with risks of water splashing. Resist to spas and swimming pools ozone concentration.

Membranes: EPDM, dia 22 mm. Silicone or NBR on request. Double membrane on request.

Fluid: air

Fitting: Plastic spout for 1/8(3mm) or 1/16(1.5mm) ID flexible plastic tubing maximum hardness 70 shore A

Pressure: positive

Housing: PA66, UL94 VO and ABS

Contact: SPNO or SPDT, snap action. SPNC contacts available with MOQ

Electrical rating: Depends on micro-switch operating force that is linked to the electrical rating

  • Standard rating micro-switch (medium and high pressure calibration only): 16A 125/250VAC;1/2HP 125VAC; 3/4HP 250VAC
  • High rating micro-switch (medium and high pressure calibration only): 2HP 240V, 21(8) A 240V (UL, CSA VDE switch)
  • Low force micro-switch (set points less than 150 mbar): 1/4HP 6(1) A 240V ( UL, CSA VDE switch)
  • On request: up to 25A 250V

Action: momentary or alternate (Latching). Electrical connection: 6.35 x 0.8 mm quick connect terminals

Maximum pressure: 4 bars (58 PSI)

Ambient temperature limits: 0 to 85°C

Barometric compensation: groove on 4 mm spout for ¼ NPSM, calibrated orifice on 9/16-18

Caution: This compensation is skipped if using ¼ thread for pressure connection

Mounting fittings: ¼” NPSM or 9/16-18 (2 possible flat positions)

Switch operation: Operates on a sealed pressure air displacement. Do not use pressure transmitters with air input to avoid pumping action. Use air transmitters with enough air volume to achieve minimum operating pressure.

Caution: too long connecting tubing and/or too small pressure trans- mitter will not operate the air switch or will operate it with a momentary action.

Accessories: shipped with plastic nut. Maximum tightening torque with plastic nut is 0.08mkg (0.8Nm).

Recommended value: 0.5 Nm . Stainless steel nut or tube securing nut (*) on request

 

Available pressure inlet fittings (1) Mounting * Tube securing nut

References (SPNO contact)

Contact us for other contact actions

 

Downloads

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Technical informations associated to this product

  • Differences between air switches and pressure switches

    Pressure switches are used to control the pressure of a medium and operate an electrical device. When pressure rises to the set point value, they switch off the equipment or switch on an alarm. Fluid they control can be air or water. There is no barometric or ambient temperature compensation in pressure switches.
  • Absolute pressure, barometric pressure,negative pressure, differential pressure

    Although pressure is an absolute value, the current measures pressure, are usually made relative to ambient air pressure. In other cases, the measurements are compared to vacuum. This leads to confusion and errors.
  • Electrical contacts

    As numerous mechanisms exist, we decided not to distinguish on the basis of constructive technique, but according to their operation speed, which is the key element.
  • Technical foreword of elastomeric membrane pressure switches

    The pressure switches of this catalogue are made according to the flexible elastomeric membrane technology. The pressure applied deforms the membrane which then actuates an electrical contact.