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S-Series (Vacuum, Differential) Pressure Switch
Brand: ASCOASCO 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 snapaction swtiches.
The electrical snap-action switch together with the adjusting mechanism is a fully-tested, self-contained subassembly.
Features- Set point repeatability, +1% of operating range.
- All wiring terminals, adjustments and visual scales are accessible from the front of the switch.
- Choice of general-purpose, watertight or explosion proof enclosures.
- Choice of fixed or full-range adjustable deadband.
- Choice of single or two-stage units.
- Manual reset units available.
- Mounts in any position.
- Rugged and vibration resistant.
- Visual adjustment scales in psi and bars.
- External adjusting nuts.
- Separate electrical, pressure and adjusting chambers.
- Wide selection of transducer wetted materials suitable for air, water, oil or corrosive fluids.
- Mix and match switch and transducer components for increased stock flexibility or to change pressure ranges in field.
Specifications
Brand
Adjustment Type
- Field Adjustable
Ambient Temperature Range
- -20° to 60° C (-4° to 140° F)
Approvals & Certifications
- CSA
- UL
Diaphragm Material
- Buna-N
- Ethylene Propylene (EPR)
- Fluorosilicone
- Neoprene
- Viton
Electrical Connectors
- 3/4” NPT
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
- 10 A at 125/250 Vac
- 15 A at 125 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 to 1.034
- Inches Hg: 0 to 30
- Inches WC: 0 to 400
- kPa: 0 to 103.4
- psi: 0 to 15
Process Connection Material
- 303 Stainless Steel
- 316 Stainless Steel
- Aluminum
- Brass
Proof Pressure
- bar: 1.034 to 3.447
- kPa: 103.4 to 344.7
- psig: 15 to 50
Set Point - Decreasing
- bar: 0 to 27.58
- Inches Hg: -30 to 0
- kPa: 0 to 2,758
- psi: 0 to 400
Set Point - Increasing
- bar: 0 to 27.58
- Inches Hg: -30 to 0
- kPa: 0 to 2,758
- psi: 0 to 400
Standard Features
- Explosion-proof
- General-purpose
- Watertight
Switch Type
- SPDT
System Pressure
- bar: 1.034 to 3.447
- kPa: 103.4 to 344.7
- psig: 15 to 50