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S31/S34 Differential Pressure Switch
Brand: Delta MobreySpecifications
- Weatherproof and Flameproof models ATEX and NEC 500
- NACE MR-01-75 compatibility
- Ranges available up to psi: 160 (kPa: 1,000, bar: 10), Static pressure up to psi: 3,500 (kPa: 25,000, bar: 250)
- Field set adjustment against a reference scale
- Hermetically sealed microswitch options
- Optional gold alloy contacts
- Terminal block for easy field wiring
- Safety vented design as standard
Specifications
Brand
Adjustment Type
- Field Adjustable
Ambient Temperature Range
- -25° to 60° C (-13° to 140° F)
Applications
- Chemical Industry
- OEM Applications
- Oil & Gas Applications
- Petrochemical
- Power
- Refining
Approvals & Certifications
- ATEX Directive 2014/35/EU
- CE
- CSA (C,US) Class I, Groups C, D, Class II, Groups E, F, G
- Ex II 2 GD, II 1 G
- LVD 2014/35/EU
- NEC 500
- PED 2014/68/EU
Approvals & Certifications
- SIL 2 Certification
BSP Connection
- 1/4” BSPT Female
Cable Entry
- 1/2” NPT Female
- 3/4” NPT Female
- M20 x 1.5
Conduit Connection
- 3/4” Conduit
Diaphragm Material
- 316 Stainless Steel
- Nitrile
Electrical - Free Leads
- 14 AWG, 2.5 mm²
Electrical Connectors
- Terminal Block
Electrical Contacts
- Gold Alloy Contacts for Low Voltage Switching
- Gold-Plated Silver
Electrical Rating
- CSA & IEC: 1 A at 125 Vac
- CSA: 1 A at 30 Vac/dc
- CSA: 100 mA at 30 Vdc
- CSA: 2 A at 30 Vdc
- CSA: 5 A at 110/250 Vac
- CSA: 5 A at 30 Vdc
- IEC 947-5-1 / EN 60947-5-1: 0.22 / 0.1 A at 125/250 Vdc
- IEC 947-5-1 / EN 60947-5-1: 0.3 A at 120 Vac
- IEC 947-5-1 / EN 60947-5-1: 0.6 / 0.3 A at 120/240 Vac
Enclosure Finish
- Light Gray Epoxy Resin Paint
Enclosure, Body Material
- Flameproof, Weatherproof & Intrinsic Safe: Austenitic Stainless Steel
- Flameproof: Die Cast Aluminum-silicon Alloy
- Weatherproof & Intrinsic Safe: Die Cast Zinc Alloy
Environmental Protection
- Flameproof Ex d
- IP66
- NEMA 4
- NEMA 4X
- NEMA 7
- NEMA 9
- Weatherproof
Flange Material
- Aluminum
- Cast Iron
Materials of Construction
- Mounting Bracket: Stainless Steel
Mounting
- 2” Pipe Mounting Bracket
Mounting Position
- Vertical
NACE & NIST
- NACE MR-0175
NPT Connection
- 1/2”-14 Female NPT
- 1/2”-14 Male NPT
- 1/4”-18 Female NPT
Operating Pressure
- psi: 0 to 1,600 (kPa: 0 to 11,000, bar: 0 to 110) - Model S31
- psi: 0 to 3,500 (kPa: 0 to 25,000, bar: 0 to 250) - Model S34
Process Temperature
- 0° to 60° C (32° to 140° F) - Max.
Repeatability
- Set Point Repeatability: ± 1 % of Span at 20° C (68° F) Ambient
Seat / Seal Material
- Seal: Nitrile
- Seal: PTFE
Service
- Oxygen Service
Set Point - Decreasing
- bar: 0.4 to 10
- Inches WC: -5 to 64
- kPa: 40 to 1,000
- mbar: -12.5 to 600
- psi: 1.5 to 160
Set Point - Increasing
- bar: 0.4 to 10
- Inches WC: -5 to 64
- kPa: 40 to 1,000
- mbar: -12.5 to 600
- psi: 1.5 to 160
Static Pressure
- psi: 0 to 3,500 (kPa: 0 to 25,000, bar: 0 to 250)
Storage Temperature
- -25° to 60° C (-13° to 140° F)
Switch Type
- DPDT Hermetically Sealed & Snap-Action Microswitch
- SPDT Hermetically Sealed & Snap-Action Microswitch
System Pressure
- bar: 250
- kPa: 25,000
- psi: 3,500
Voltage
- Impulse to Withstand Voltage Across Contacts: 0.5 kV
- Impulse to Withstand Voltage Across Contacts: 0.8 kV
- Insulation Voltage: 125 V
- Insulation Voltage: 250 V
- Withstand Voltage: 1.2 kV - Micro Switch
- Withstand Voltage: 2 kV between Live Parts & Earth/Ground
- Withstand Voltage: 500 V between Open Contacts
Wetted Materials
- Austenitic 300 Stainless Steel
- Oil & Gas
- Chemical
- Petrochemical
- Refining
- Power
- OEM
