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B-Series NEMA 4 Pressure Switch

Brand: Ashcroft Inc.

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The Ashcroft® B4 Pressure Switch is designed for use in virtually all industrial and OEM applications.

Providing reliability and long-cycle life, it is ideal for satisfying requirements for pressure control, shutdown or alarm operations.

Special designs are available to meet NACE and Fire-safe applications.

Specifications:
  • Accuracy: ±1.00% full scale
  • NEMA 4X (IP66) aluminum enclosure
  • Single setpoint
  • Pressure ranges: vacuum to 3,000 psi
  • SPDT or DPDT switching option
Features
  • Adjustable setpoints from 15%-100% of range 
  • Fixed or limited adjustable deadband 
  • Wide selection of switch elements and wetted materials 
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The Ashcroft® B4 Pressure Switch is designed for use in virtually all industrial and OEM applications.

Providing reliability and long-cycle life, it is ideal for satisfying requirements for pressure control, shutdown or alarm operations.

Special designs are available to meet NACE and Fire-safe applications.

Specifications:
  • Accuracy: ±1.00% full scale
  • NEMA 4X (IP66) aluminum enclosure
  • Single setpoint
  • Pressure ranges: vacuum to 3,000 psi
  • SPDT or DPDT switching option
Features
  • Adjustable setpoints from 15%-100% of range 
  • Fixed or limited adjustable deadband 
  • Wide selection of switch elements and wetted materials 

Specifications

Adjustment Type

  • Factory Set (Pre-Set)
  • Field Adjustable

Applications

  • Corrosive Environments
  • Offshore Platforms, Pipelines
  • Power Plants
  • Pulp & Paper
  • Refining, Chemical, Petrochemical
  • Steel Mills
  • Water Treatment

Approvals & Certifications

  • CSA
  • FM
  • UL

Burst Pressure

  • bar: 2.4 to 1,241
  • kPa: 241.32 to 124,105
  • psig: 35 to 18,000

Deadband, Approximate

  • bar: 0.01 to 22.68
  • kPa: 1.38 to 2,268
  • psig: 0.2 to 329

Diaphragm Material

  • Buna-N
  • Monel
  • Stainless Steel
  • Teflon
  • Viton

Electrical - Free Leads

  • 16" (41 cm) Free Leads

Electrical Connectors

  • 3/4" NPT Female
  • M20 Male

Electrical Contacts

  • Gold

Electrical Rating

  • 1 A at 125/250 Vac
  • 10 A, 125 / V AC or DC, 1/8 hp 125 V AC or DC
  • 11 A, 125/250 Vac, 5 A, 30 Vdc
  • 15 A, 125/250 Vac
  • 15 A, 125/250/480 Vac, 1/2 A, 125 Vdc, 1/4 A, 250 Vdc
  • 5 A at 125/250 Vac

Element

  • Ammonia Service
  • Dual Elements
  • General-purpose
  • Heavy Duty AC
  • Heavy Duty DC
  • Hermetic Seal Switch, General-purpose
  • Hermetic Seal Switch, Narrow Deadband
  • Hermetic Seal, Gold Contacts
  • High Temperature 149° C (300° F)
  • Low Level (Gold Contacts)
  • Manual Reset on Decreasing Pressure
  • Manual Reset on Increasing Pressure
  • Narrow Deadband
  • Sealed Environment Proof

Enclosure Finish

  • Epoxy Coated

Enclosure, Body Material

  • 316 Stainless Steel
  • Aluminum

Environmental Protection

  • IP54
  • IP66
  • NEMA 13
  • NEMA 3, 4, 4X, 13 / IP54, 66
  • NEMA 4
  • NEMA 4X

Mounting

  • 2" Pipe Mounting Bracket
  • Wall Mounting Bracket ("H 2O)

NPT Connection

  • 1/2" NPT Female
  • 1/2" NPT Male
  • 1/4" NPT Female

Operating Temperature

  • -29° to 66° C (-20° to 150° F)

Options

  • Fungus Proofing
  • Paper Tag
  • Stainless Steel Tags

O-Ring Material

  • Buna-N
  • Teflon
  • Viton

Pressure Range

  • bar: 1.034 to 206.8
  • Inches WC: -15 to 150
  • kPa: 103.4 to 20,680
  • psi: 15 to 3,000

Proof Pressure

  • bar: 827 to 6,895
  • kPa: 82,737 to 689,476
  • psig: 20 to 12,000

Set Point - Decreasing

  • -30" Hg to 3,000 psig
  • bar: 0 to 206.8
  • Inches Hg: -30 to 0
  • Inches WC: -15 to 150
  • kPa: 0 to 20,680
  • psig: 0 to 3,000

Set Point - Increasing

  • -30" Hg to 3,000 psig
  • bar: 0 to 206.8
  • Inches Hg: -30 to 0
  • Inches WC: -30 to 150
  • kPa: 0 to 20,680
  • psig: 0 to 3,000

Switch Type

  • DPDT
  • SPDT

System Pressure

  • bar: 0 to 6,895
  • Inches Hg: -30 to 0
  • Inches WC: -30 to 150
  • kPa: 0 to 689,476
  • psig: 0 to 12,000