L/LP-Series NEMA 4 Pressure Switch

Brand: Ashcroft Inc
Does not ship to Virginia, United States

The Ashcroft® L (LP) Pressure Switch is designed for use on applications requiring high reliability, safety and accuracy.

Its straight forward design allows for easy field installation and calibration. The LP pressure switch is ideal for pressure control, safety shutdown or alarm operations.

Specifications
  • Accuracy: ±1.00% full scale
  • NEMA 4X (IP65) aluminum enclosure
  • Single or dual set points
Features
  • Wide selection of switch elements and wetted materials 
  • Multiple process connections available 
  • Adjustable setpoints from 15%-100% of range 
  • Fixed or adjustable deadbands 

Specifications

Adjustment Type

  • Differential Pressure Control, Single Set Point, Adjustable Deadband
  • Differential Pressure Control, Single Set Point, Fixed Deadband
  • Differential Pressure Control, Two Independently Adjustable Set Points, Fixed Deadband
  • Factory Set (Pre-Set)
  • Field Adjustable
  • Pressure Control, Single Set Point, Adjustable Deadband
  • Pressure Control, Single Set Point, Fixed Deadband
  • Pressure Control, Two Independently Adjustable Set Points, Fixed Deadband

Approvals & Certifications

  • CE
  • CSA
  • FM
  • UL

Burst Pressure

  • bar: 2.41 to 965.26
  • kPa: 241 to 96,526
  • psig: 35 to 14,000

Burst Pressure - Compound

  • bar: 27.58
  • kPa: 2,758
  • psig: 400

Burst Pressure - Vacuum

  • bar: 27.58
  • kPa: 2,758
  • psig: 400

Compound Pressure

  • 30” Hg (-760 mmHg) at 15 psi

Deadband, Approximate

  • bar: 0.03 to 179.26
  • bar: 0.03 to 24.82
  • kPa: 3.44 to 2,482
  • kPa: 3.45 to 17,926
  • psid: 0.5 to 360
  • psig: 0.50 to 2,600

Deadband, Approximate - Compound

  • bar: 0.03 to 1.72
  • kPa: 6.98 to 172.36
  • psig: 1 to 25

Electrical Connectors

  • 3/4” Sealed Conduit Connection with 16” Lead Wires
  • 3/4” to 1/2” Conduit Reducing Bushing
  • Terminal Block

Electrical Rating

  • 1/8 hp at 125 Vac/Vdc
  • 10 A at 125 Vac/Vdc
  • 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
  • 6 A at 30 Vdc

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)
  • Narrow Deadband
  • Sealed Environment Proof

Enclosure, Body Material

  • Die Cast Aluminum

Environmental Protection

  • IP65
  • IP66
  • NEMA 4, 4X / IP65, 66
  • NEMA 4X

Mounting

  • Top Mounting

NPT Connection

  • 1/2” NPT Female
  • 1/2” NPT Male
  • 1/4” NPT Female
  • 1/4” NPT Female & 1/2” NPT Male Combination

O-Ring Material

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

Options

  • Chained Cover
  • Cleaned for Oxygen
  • Fungus Proofing
  • Stainless Steel Tags

Pressure Range

  • bar: 0.89 to 206.84
  • kPa: 7.45 to 20,684
  • psig: 1.08 to 3,000

Pressure Type

  • Differential
  • Gauge
  • Vacuum

Proof Pressure

  • bar: 1.38 to 827
  • bar: 1.49 to 551.58
  • kPa: 137 to 82,737
  • kPa: 149 to 55,158
  • psid: 21.6 to 8,000
  • psig: 20 to 12,000

Proof Pressure - Compound

  • bar: 17.24
  • kPa: 1,723
  • psig: 250

Proof Pressure - Vacuum

  • bar: 17.24
  • kPa: 1,723
  • psig: 250

Repeatability

  • ± 1 % of Operating Range

Set Point - Decreasing

  • -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

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

Static Pressure

  • bar: 0.37 to 68.95
  • kPa: 37.23 to 6,894
  • psid: 5.4 to 1,000

Switch Type

  • 2 SPDT
  • DPDT
  • SPDT

System Pressure

  • bar: -1.02 to 551.58
  • Inches Hg: -30 to 0
  • Inches WC: 30 to 150
  • kPa: -100 to 82,737
  • psig: -14.73 to 12,000

Vacuum Pressure

  • -30” Hg at -14.73 psig
  • bar: -1.02
  • kPa: -100

  • Compressors
  • Pumps
  • Paint Spraying Equipment
  • Boilers & Burners
  • Turbines
  • Reverse Osmosis Systems
  • Filters
  • Presses
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