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400 Series Type H400 Models 550 to 555 Pressure Switch
Brand: United Electric Controls Ltd.
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 & Minimum 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 & Minimum Set Point will Increase
- SPDT
Vibration
- Set Point Repeats after 2.5 G, 5 to 500 Hz
Window Material
- Gasketed Lexan Window
