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S-Series Pressure Switch

Brand: ASCO
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ASCO S-Series pressure switches consist of a switch unit and a transducer unit. They can be ordered separately for customer stocking and/or field assembly or as a complete factory-assembled unit.

Switch
S-Series pressure switch units incorporate the unique ASCO TRI-POINT alternating fulcrum balance plate to control the operation of one or more electrical snap- action swtiches.

The electrical snap-action switch together with the adjusting mechanism is a fully-tested, self-contained subassembly.

Transducer
Transducer unit incorporates a diaphragm/piston type pressure sensor, and is also a fully-tested, self-contained subassembly.
Features
  • Set point repeatability, +1% of operating range. 
  • UL Listed in the gas and oil equipment list. 
  • FM Approved as “pressure supervisory switches.” 
  • Externally visible pressure setting scales. 
  • External adjusting nuts. 
  • Choice of fixed or full-range adjustable deadbands. 
  • Choice of single or two-stage units. 
  • Mounts in any position. 
  • Rugged and vibration resistant. 
  • Separate electrical, pressure and adjusting chambers. 
  • Mix and match switch and transducer components for increased stock flexibility or to change pressure ranges in field. 
  • Withstands high surge pressures.
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ASCO S-Series pressure switches consist of a switch unit and a transducer unit. They can be ordered separately for customer stocking and/or field assembly or as a complete factory-assembled unit.

Switch
S-Series pressure switch units incorporate the unique ASCO TRI-POINT alternating fulcrum balance plate to control the operation of one or more electrical snap- action swtiches.

The electrical snap-action switch together with the adjusting mechanism is a fully-tested, self-contained subassembly.

Transducer
Transducer unit incorporates a diaphragm/piston type pressure sensor, and is also a fully-tested, self-contained subassembly.
Features
  • Set point repeatability, +1% of operating range. 
  • UL Listed in the gas and oil equipment list. 
  • FM Approved as “pressure supervisory switches.” 
  • Externally visible pressure setting scales. 
  • External adjusting nuts. 
  • Choice of fixed or full-range adjustable deadbands. 
  • Choice of single or two-stage units. 
  • Mounts in any position. 
  • Rugged and vibration resistant. 
  • Separate electrical, pressure and adjusting chambers. 
  • Mix and match switch and transducer components for increased stock flexibility or to change pressure ranges in field. 
  • Withstands high surge pressures.
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Specifications

Brand

Adjustment Type

  • Field Adjustable

Ambient Temperature Range

  • -20° to 60° C (-4° to 140° F)

Approvals & Certifications

  • FM
  • UL

Diaphragm Material

  • Buna-N
  • Ethylene Propylene (EPR)
  • Fluorosilicone
  • Neoprene
  • Viton

Electrical Contacts

  • Gold

Electrical Rating

  • 1/2 A at 125 Vdc
  • 1/4 A at 250 Vdc
  • 1/4 hp at 250 Vac
  • 1/8 hp at 125 Vac
  • 5 A at 125/250 Vac

Enclosure, Body Material

  • 316 Stainless Steel
  • Aluminum

NPT Connection

  • 1/2” NPT Female
  • 1/4” NPT Female

O-Ring Material

  • Buna-N
  • Ethylene Propylene (EPR)
  • Fluorosilicone
  • Neoprene

Pressure Range

  • bar: 0.028 to 6.895
  • Inches WC: 0 to 400
  • kpa: 2.758 to 689.5
  • psig: 0.4 to 100

Process Connection Material

  • 303 Stainless Steel
  • 316 Stainless Steel
  • Aluminum
  • Brass

Proof Pressure

  • bar: 1.034 to 13.79
  • kpa: 103.4 to 1,379
  • psig: 15 to 200

Set Point - Decreasing

  • bar: 0.027 to 6.894
  • Inches WC: 0 to 400
  • kPa: 2.757 to 689.4
  • psi: 0.4 to 100

Set Point - Increasing

  • bar: 0.027 to 6.894
  • Inches WC: 0 to 400
  • kPa: 2.757 to 689.4
  • psi: 0.4 to 100

Standard Features

  • Watertight

Switch Type

  • SPDT

System Pressure

  • bar: 1.03 to 13.79
  • kPa: 103.4 to 1,379
  • psig: 15 to 200
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