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Low Pressure Switch – Low Range Series 20 Explosion Proof Differential Switch
Brand: SOR IncThe Series 20 Differential Pressure Switch from SOR is essentially a Static "O" Ring type pressure sensor with a bias pressure.
The housing is pressurized by clean, dry air or inert gas instead of atmospheric pressure.
This reference (bias pressure) opposes the process pressure.
Housings are weathertight or explosion proof. Switching elements are SPDT or DPDT.
Features- Built-In Quality - Rigid quality standards maintained from raw material to finished product.
- Delivery
- Routine shipments 7 to 10 working days
- Emergency shipments via air same day
- Service - Factory service engineers and area factory representatives provide effective and prompt worldwide service.
- Warranty - 3 years from date of manufacture.
- Complete Product Line - Standard models with many options cover pressure range 2.5 in. wcd to 75 psid. Customized specials available.
- Wetted Parts - Wide selection of materials.
- Instrument Quality - High repeatability, narrow dead band, negligible temperature effect and static influence.
- Field Adjustable - Excellent resolution of Set Points, self-locking adjustment, no special tools required. No-charge factory calibration.
- Construction
- Rugged, high cycle rate tolerance, long life, not critical to vibration, high overrange and proof pressures, withstands full Hi and Lo side pressure reversals, excellent corrosion resistance to hostile environments
- Snap-Action Electrical Switching - Wide selection UL Listed and CSA Certified switching elements for AC and DC service.
- Agency Listings/Certification - CSA
- Safety Certified to IEC 61508 (SIL) - SOR products are certified to IEC 61508 for non-redundant use in SIL1 and SIL2 Safety Instrumented Systems for most models.
Specifications
Brand
Pressure Range
- 2.5 in W.C.d to 75 psid
Process Connection
- 1/2" NPT Female
- 1/4" NPT Female
- 1" NPT Male
Process Connection Material
- Aluminum 6061 Wrought 356 or 360 Casting
- 316 Stainless Steel Wrought/ CF-8M Casting
- 347 Stainless Steel Wrought/ CF-8C Casting
- Brass Silicon Brass Casting
- Carpenter 20 Wrought/ CF-7M Casting
- Hastelloy B
- Hastelloy C
- Monel
Approvals & Certifications
- CRN - Canadian Registration Number
- CSA
- UL
- SIL 2
Electrical Rating
- 0.3 A at 125 Vdc, Resistive
- 0.4 A at 125 Vdc, Resistive
- 0.5 A at 125 Vdc, Resistive
- 1 A at 28 Vdc, Resistive
- 1 A at 30 Vdc, Resistive
- 5 A at 30 Vdc, Resistive
- 11 A at 250 Vac
- 15 A at 250 Vac
- 5 A at 250 Vac
- 1 A at 125 Vac
Electrical Connection
- 1/2" NPT Female
- 1/2" NPT Male
- 3/4" NPT Female
- 3/4" PF
- M20 x 1.5
- PG13.5
Cover Material
- Aluminum - Housing TA
Switch Type
- DPDT
- SPDT
Approvals & Certifications
- Calibration
- Compliance / Conformance
- Dielectric Test
- Hydrostatic Pressure Test
- Inspection Report
- Insulation Resistance
- SIL 1 & 2 Certification
- Typical Material of Wetted Parts
Housing Material
- Aluminum - Housing RB
- Cast Iron - Housing TA
- Stainless Steel - Housing RH
Deadband
- Typical psi: 0.029 to 0.5 (kPa: 0.2 to 3.5, Mbar: 2 to 35)
Diaphragm Material
- 316L Stainless Steel
- Buna-N
- Carpenter 20 Stainless Steel
- Ethylene Propylene (EPR)
- Hastelloy B
- Hastelloy C
- Kalrez
- Monel
- Neoprene
- Tantalum
- Teflon-Coated Polyimide (TCP)
- Viton
Set Point - Increasing
- bar: 0.03 to 5
- inH₂O: 2.5 to 45
- kPa: 3 to 500
- psi: 0.4 to 75
Set Point - Decreasing
- bar: 0.03 to 5
- inH₂O: 2.5 to 45
- kPa: 3 to 500
- psi: 0.4 to 75
Maximum System Pressure
- psi: 20 (kPa: 140, bar: 1.4) - Housing RB (Low Port)
- psi: 200 (kPa: 1,400, bar: 14) - Housing TA (Low Port) & Piston 22 (High Port)
- psi: 750 (kPa: 5,000, bar: 50) - Piston 24 (High Port)
O-Ring Material
- AFLAS
- Buna-N
- Ethylene Propylene (EPR)
- Kalrez
- Neoprene
- Viton
- Viton GLT
Environmental Protection
- Explosion-proof
- IP52
- IP65
- NEMA 4
- NEMA 4X
- Weathertight
Ambient Temperature
- -34° to 80° C (-30° to 180° F)
- Fluid Power Applications
- Process Applications