RT Pressure Switch

Brand: Danfoss

RT Pressure Controls incorporate a pressure controlled, single-pole change over swich where the contact position depends on the pressure in the connection port and the set value. 

The RT series consists of pressure controls, differential pressure controls and pressure controls for neutral zone regulation, all for general use within the industrial and marine segments. 

The series also covers safety pressure controls dedicated for steam boiler plants. 

For installations in which operation is particularly critical from safety and economic points of view, the use of fail-safe pressure controls is recommended. 

The use of gold-plated contacts is also recommended in such installations, provided operation involves only a few switching cycles or signal currents and voltages.
Features
  • Simple design
  • High accuracy
  • High repeatability
  • Long operation life time
  • Available with all major marine approvals

Specifications

Brand

Ambient Temperature Range

  • -10° to 70° C (14° to 158° F) - Diaphragm Version
  • -40° to 70° C (-40° to 158° F) - VD TUV Approved
  • -50° to 70° C (-58° to 158° F)

Applications

  • Monitoring of Differentials

Approvals & Certifications

  • BV
  • CCC
  • CE EN 60947-4-5
  • DNV
  • GL
  • IEC 529
  • LRS
  • NKK
  • PED 97/23/EC
  • PED EN 12953-9 & EN 12922-11
  • RINA
  • RMRS
  • VD TÜV

BSP Connection

  • G 1/2” Male A
  • G 1/4” Male
  • G 3/8” Male A

Cable Entry

  • 2 PG13.5 for 0.24” to 0.55” (6 to 14 mm) Diameter Cable

Connection Material

  • Carbon Steel C20 (1.0402), Case Hardening Steel C15 (1.0401)
  • Free Cutting Steel (1.0718) - Flare Connection
  • Stainless Steel, Weldable Free-Cutting Steel (1.4301)

Cover Material

  • Polyamide

Diaphragm Material

  • Deep-Drawn Steel (1008 / 1.0338)
  • NBR Rubber

Differential Pressure

  • psi: 0.145 to 58 (kPa: 1 to 400, bar: 0.01 to 4)

Electrical Connectors

  • DIN 50961
  • DIN 53470

Electrical Contacts

  • Gold-Plated

Electrical Rating

  • 230 Vdc at 12 W - Contact Material
  • 400 Vac at 10 A - Contact Load
  • 400 Vac at 3 A - Contact Load
  • 400 Vac at 4 A - Contact Load

Enclosure, Body Material

  • Bakelite
  • Brass - Bellows Ring
  • Deep-Drawn Steel (1008 / 1.0338, Nickle-Plated Surface)
  • Nickel-Plated Steel

Environmental Protection

  • IP54
  • IP66 - IEC 529 & EN 60529

Gasket Material

  • Aluminum

Materials of Construction

  • 303 Stainless Steel, 1.4305 - Bellows
  • 631 Stainless Steel (1.4568) - Spring

Maximum System Pressure

  • psi: 7.252 to 681.7 (kPa: 50 to 4,700, bar: 0.5 to 47)

Operating Pressure

  • psi: 6 to 609 (kPa: 40 to 4,200, bar: 0.4 to 42) - Max.

Orifice Material

  • Stainless Steel 17/7 (303/1.4305)

Process Temperature

  • -10° to 90° C (14° to 194° F) - Diaphragm Version
  • -40° to 100° C (-40° to 212° F)
  • -40° to 150° C (-40° to 302° F) - VD TUV Approved

Ring Material

  • Brass - Bellows Ring
  • Deep-Drawn Steel + Ni (1008 / 1.0338) - Bellows Ring
  • Stainless Steel

Screw Material

  • 303 Stainless Steel, 1.4305

Set Point - Decreasing

  • bar: -1 to 30
  • kPa: -100 to 3,000
  • psi: -14.5 to 435

Set Point - Increasing

  • bar: -1 to 30
  • kPa: -100 to 3,000
  • psi: -14.5 to 435

Spring Material

  • 631 Stainless Steel 17/7 (1.4568)
  • Deep-Drawn Steel

Switch Type

  • Single-Pole Change-Over Switch
  • SPDT

System Pressure

  • bar: 42
  • kPa: 4,200
  • psi: 609

Documentation

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