400 Series Type H400 Models 550 to 555 Pressure Switch

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

Pressure Switch, Vacuum Switch, and Temperature Switch Models for Threshold Protection & Control. The United Electric 400 Series is a versatile family that includes vacuum switch, pressure switch, differential pressure switch, and temperature switch models for applications that require single or multiple switching capabilities. 

Dual- and triple-switch versions provide multi-output for alarm and shutdown, pre-alarm and alarm, high/low limit, or level staging functions.

A wide variety of microswitch and process connection options, along with weather-tight enclosures, make the 400 Series an ideal choice for most ordinary location applications. Its worldwide use is assured with approvals and certifications to agency standards.

Widely used throughout the process industries, 400 Series vacuum switch, pressure switch, differential pressure switch, and temperature switch products provide threshold protection and control for many critical functions. 

Typical installations are found in industrial gas production; energy generation including pumps, turbines, and compressors; pulp and paper; and water and wastewater treatment.
Features
  • Rugged, NEMA 4X, epoxy coated enclosure
  • SPDT or DPDT switch output
  • Easy access wiring
  • Single switch output
  • Internal reference scale and adjustable deadband available
  • Adjustable Ranges:
    • 30 “Hg Vac to 5000 psi
    • -1 bar to 344 bar
    • 0.2 “wcd to 500 psid
    • 0,5 mbar to 34,5 bar
    • -120° F to 650° F
    • -85° C to 340° C
  • Approvals: UL, CSA, CE, FM
  • UL listed and cUL certified
  • CE compliant to low-voltage directive and pressure equipment directive
  • Optional ATEX or EAC intrinsic-safety compliance
  • Welded stainless-steel bellows models
  • Ultra-low pressure, “wc models
  • Optional sensor material for corrosive media

Specifications

Adjustment Type

  • Captive Clamp Screws
  • Factory Set (Pre-Set)
  • Set Point Adjustment

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

  • Energy Generation Including Pumps
  • Industrial Gas Production
  • Pulp & Paper
  • Turbines & Compressors
  • Water & Wastewater Treatment

Approvals & Certifications

  • ISO 9001

Approvals & Certifications

  • ATEX Ex directive (94/9/EC) II 1 G Ex ia IIC T6 Ga Tamb: -50° to 60° C (-58° to 140° F)
  • CE
  • CSA C22.2 No. 14, File # E42272
  • FM Class 3545
  • GOST-R 51330.0, 51330.1, 51330.10 & 51330.14
  • Low Voltage Directive (LVD) 2006/95/EC
  • PED: 97/23/EC
  • UL (C,US) 508

Deadband

  • Inches Hg: 0.1 to 1
  • psi: 0.05 to 0.75 (kPa: 0.3 to 5.2, Mbar: 3.4 to 51.7)

Diaphragm Material

  • Teflon

Electrical Connectors

  • 7/8” Hole to 1/2” NPT Female Watertight Conduit Fitting
  • One 3/4” NPT
  • Screw Terminal
  • Two 7/8” Diameter Knockouts

Electrical Contacts

  • Gold Contacts, 1 A at 125 Vac Resistive
  • Normally Closed
  • Normally Open

Electrical Rating

  • 1 A at 125 Vac Resistive
  • 10 A at 125 Vdc Resistive, Deadband & Min. Set Point Will Increase
  • 20 A, 125/250/480 Vac Resistive
  • Close Deadband, 5 A at 125/250 Vac Resistive
  • External Manual Reset, High Ambient, 15 A at 125/250/480 Vac Resistive, Temperatures up to 145° C (250° F)
  • Vapor Sealed, Fungus Resistant Case,15 A 125/250 Vac Resistive

Enclosure Finish

  • Epoxy Powder-Coated

Enclosure, Body Material

  • Gasketed Die Cast Aluminum

Environmental Protection

  • Intrinsically Safe
  • IP66
  • NEMA 4X
  • Weathertight

Indication

  • Single Red Status Light, 115 Vac

Mounting

  • Hole
  • Pipe
  • Surface

Name Plate, Tag Material

  • Stainless Steel, Paper ID Tag & Wire Attachment

NPT Connection

  • 1/4” NPT Female

O-Ring Material

  • Viton

Process Connection Material

  • 316L Stainless Steel

Proof Pressure

  • psi: 225 (kPa: 1,551, bar: 15.5)

Repeatability

  • Set Point Repeatability: ± 2 % of Full Scale

Service

  • Oxygen Service Cleaning, Alcohol Cleaning to Remove Residue from the Process Connection

Set Point - Decreasing

  • bar: -1 to 6.9
  • Inches Hg: -30 to 0
  • kPa: -101.4 to 689.5
  • psi: -14.7 to 100

Set Point - Increasing

  • bar: -1 to 6.9
  • Inches Hg: -30 to 0
  • kPa: -101.4 to 689.5
  • psi: -14.7 to 100

Shock

  • Set Point Repeats after 15 G, 10 millisecond Duration

Storage Temperature

  • -54° to 71° C (-65° to 160° F)

Switch Type

  • DPDT Switch, 10 A at 125/250 Vac Resistive, Deadband & Min. Set Point Will Increase
  • SPDT

Vibration

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

Window Material

  • Gasketed Lexan Window

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