J21K Series Type J21K Models 232 & 254 Differential Pressure Switch

Brand: United Electric Controls Ltd
Does not ship to OH, United States

The J21K differential pressure switch monitors the difference between two system pressures or vacuums and senses excessive flow deviation, or verifies that a filter is clogged. 

The J21K's rugged design - with epoxy coated enclosure and sealed metal bellows - lends itself to exacting applications. Widely used in refrigeration (chiller) and compressor applications, the J21K can be used for filter status monitoring and proof of flow.
Features
  • Sealed metal bellows sensors
  • Welded 316 stainless steel sensors
  • Gasketed die-cast aluminum enclosure with epoxy coating
  • Single switch output
  • Adjustable ranges: 30" Hg vac to 90 psid (-1 to 6 bar)
  • Designed to meet enclosure Type 4X (with watertight conduit fitting)
  • UL listed and cUL certified
  • Optional ATEX and Rostechnadzor
  • (GOST-R) intrinsic safety compliance
  • Optional adjustable deadband
  • Single switch output
  • Opposing bellows design

Models matching criteria: 1
Out of Stock
Does not ship to OH, United States

Specifications

Ambient Temperature Range

  • -40° to 71° C (-40° to 160° F), Set Point Typically Shifts less than 1 % of Range for a 28° C (50° F) Ambient Temperature Change

Applications

  • Refrigeration (Chiller) & Compressor

Approvals & Certifications

  • ISO 9001

Approvals & Certifications

  • ATEX Ex directive (94/9/EC) II 1 G EEx ia IIC T6, Tamb: -50° to 60° C (-58° to 140° F)
  • CE
  • GOST R 51330.0, 51330.1, 51330.10 & 51330.14
  • Low Voltage Directive (LVD) 73/23/EC & 93/68/EEC
  • PED: 97/23/EC
  • UL (C,US)

Deadband

  • psi: 0.6 to 4 (kPa: 4.14 to 27.58, Mbar: 41.37 to 275.8)

Electrical Connectors

  • 7/8” Diameter Conduit Hole

Electrical Contacts

  • Gold
  • Normally Closed
  • Normally Open

Electrical Rating

  • 1 A at 125 Vac Resistive
  • 15 A at 125/250/277 Vac Resistive
  • 5 A at 125/250 Vac Resistive

Enclosure Finish

  • Epoxy Powder-Coated

Enclosure, Body Material

  • Gasketed Die Cast Aluminum

Environmental Protection

  • IP66
  • NEMA 4X

NPT Connection

  • 1/4” NPT Female

Operating Pressure

  • psi: -14.7 to 200 (kPa: -101.4 to 1,379, bar: -1 to 13.8)

Process Connection Material

  • Phosphor Bronze Bellows

Proof Pressure

  • Differential Proof Pressure - psi: 25 to 90 (kPa: 172.4 to 620.5, bar: 1.7 to 6.2)

Repeatability

  • ± 1 % of Full Scale Range

Set Point - Decreasing

  • bar: 0 to 6.2
  • kPa: 0 to 620.5
  • psid: 0 to 90

Set Point - Increasing

  • bar: 0 to 6.2
  • kPa: 0 to 620.5
  • psid: 0 to 90

Shock

  • Set Point Repeats after 15 G, 10 millisecond Duration

Storage Temperature

  • -54° to 71° C (-65° to 160° F)

Switch Type

  • One SPDT Snap-Action Switch

System Pressure

  • bar: 13.79
  • kPa: 1,379
  • psi: 200

Vibration

  • Set Point Repeats after 2.5 G, 5 to 500 Hz

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