400 Series Type H400 Models 270 & 274 Pressure Switch

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

The 400 Series is a versatile family of vacuum, pressure, differential pressure and temperature switches 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 a weather-tight enclosure, 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, the 400 Series provides 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
  • Epoxy-coated enclosure designed to meet enclosure Type 4X 
  • Wide variety of pressure sensors and materials 
  • Setting via reference dial or hex screw adjustment 
  • FM Approved

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

  • ATEX Directive (94/9/EC) II 1 G EEx ia IIC T6 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

Approvals & Certifications

  • ISO 9001

Deadband

  • psi: 1.5 to 10 (kPa: 10.3 to 68.9, bar: 0.1 to 0.7)

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

Process Connection Material

  • Brass
  • Phosphor Bronze Bellows with Nickel-Plated Brass Pressure Connection

Proof Pressure

  • psi: 250 to 350 (kPa: 1,724 to 2,413, bar: 17.2 to 24.1)

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: 0 to 20.7
  • kPa: 0 to 2,068
  • psi: 0 to 300

Set Point - Increasing

  • bar: 0 to 20.7
  • kPa: 0 to 2,068
  • psi: 0 to 300

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

System Pressure

  • bar: 20.68
  • kPa: 2,068
  • psi: 300

Vibration

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

Window Material

  • Gasketed Lexan Window

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