646GZE-7011 Series Pressure Switch

Brand: Custom Control Sensors, LLC

The hazardous locations 646GZE-7011 Series is a rugged, heavy duty gage pressure switch with a stainless steel port and diaphragm for corrosion resistance and wet conditions.

The 646GZE-7011 Series is rated to 15 Amps and UL/CSA explosion proof, Class I, Groups A, B, C and D, and Class II Groups E, F and G.

It comes with high vibration and shock resistance utilizing Dual Snap® disc spring technology.
Features
  • Adjustable Set Point Range
    • Increasing: 1.4 to 5,000 psig, 9.65 to 34,473.79 kPa, 0.09 to 344.7 bar
    • Decreasing: 0.4 to 4520 psig, 2.76 to 31,164.30 kPa, 0.03 to 311.6 bar
  • Deadband: Approximately 1 to 480 psig, 6.9 to 3,309.48 kPa, 0.07 to 33.1 bar
  • System Pressure (Maximum): 500 to 5,000 psig, 3447.38 to 34,473.79 kPa, 35 to 345 bar
  • Proof Pressure: 750 to 7500 psig, 5171.07 to 51,710.68 kPa, 52 to 517 bar
  • Wetted Materials
    • Pressure Port: 1/2" Female NPT 316 Stainless Steel
    • O-Ring: Viton
  • Relay: SPDT or DPDT
  • UL, CSA
    • Explosion Proof - Class 1, Div/Zone 1, Groups A, B, C and D
  • CE Mark, CRN, Dual Seal, NACE

Specifications

Adjustment Type

  • Field Adjustable

Approvals & Certifications

  • ATEX
  • CE
  • CRN
  • CRN - Alberta
  • CRN - British Columbia
  • CRN - Manitoba
  • CRN - N.W. Territories
  • CRN - Saskatchewan
  • CSA
  • cUL
  • Dual Seal
  • EMC
  • LVD
  • PED
  • RoHS
  • RTN
  • UL

Deadband, Approximate

  • bar: 0.07 to 33.1
  • kPa: 6.9 to 3,309
  • psig: 1 to 480

Diaphragm Material

  • Stainless Steel

Electrical - Free Leads

  • 18” (45 cm) Free Leads
  • 18” (45 cm) Teflon Leadwire

Electrical Assembly

  • Hermetic Seal

Electrical Certification

  • ATEX - Baseefa Certified for Potentially Explosive Atmospheres. Models 646**Y, II 2 GD Ex d IIC, Ex Tb IIIC, Baseefa 05-ATEX-0011X. (Option Y)
  • c-UL, UL/CSA Explosion-proof: Div. 1, 2 Hermetically Sealed Electrical Assembly P/N 17-51 (17-73 for M Model Option), Listed by Both Underwriter’s Laboratories, Inc. (File No. E32961) & Canadian Standard Association (CSA)Testing Laboratories (File No. L

Electrical Connectors

  • 1/2” NPT Male

Electrical Contacts

  • Gold
  • Silver

Electrical Rating

  • 1 A at 125 Vac, 50/60 Hz
  • 11 A at 125/250 Vac Resistive, 5 A at 28 Vdc, 0.5 A at 125 Vdc
  • 15 A at 125/250/480 Vac Resistive, 0.2 A at 250 Vdc

Enclosure, Body Material

  • Aluminum

Environmental Protection

  • Hazardous Area
  • IP54
  • IP66
  • NEMA 13
  • NEMA 4, 7, 9, 13 / IP54, 66
  • NEMA 7
  • NEMA 9

NACE & NIST

  • NACE MR-0175: 2003

NPT Connection

  • 1/2” NPT Female

O-Ring Material

  • Ethylene Propylene (EPR)
  • Viton

Operating Temperature

  • -40° to 86° C (-40° to 187° F)

Process Connection Material

  • 316 Stainless Steel

Proof Pressure

  • bar: 51.7 to 517
  • kPa: 5,171 to 51,711
  • psig: 750 to 7,500

Service

  • Sour (Oil & Gas)

Set Point - Decreasing

  • bar: 0.03 to 312
  • kPa: 2.8 to 31,164
  • psig: 0.4 to 4,520

Set Point - Increasing

  • bar: 0.09 to 345
  • kPa: 9.7 to 34,473.7
  • psig: 1.4 to 5,000

Switch Type

  • DPDT
  • SPDT

System Pressure

  • bar: 34.5 to 345
  • kPa: 3,447 to 34,474
  • psig: 500 to 5,000

  • Boilers & Burners
  • Chemical & Petrochemical Plants
  • Chemical Refining & Processing
  • Degreasers & Evaporators
  • Fluid Management
  • Food Processing
  • Ground Support Equipment
  • Hydraulic & Lubrication Systems
  • Heating & Air Conditioning
  • Manufacturing Process
  • Oil & Gas
  • Pipelines
  • Power Generation
  • Power Plants
  • Pulp & Paper Mills
  • Pumps, Compressors & Turbines
  • Recovery Systems
  • Refineries
  • Reverse Osmosis Systems & Filters
  • Safety Systems
  • Specialized OEM Equipment
  • Steel Mills
  • Utilities
  • Water Treatment, Waste & Sewage Treatment Facilities

Advantages of Belleville Disc Spring Pressure Switches

Belleville disc springs, named after their inventor Julien Belleville, are conical-shaped washers that provide a type of spring mechanism. When used in pressure switches, Belleville disc springs offer several advantages due to their unique properties and design. These advantages make them suitable for a wide range of applications, from industrial machinery to safety equipment and a preferred choice in applications where reliability, precision, and durability are critical.

High Load Capacity in a Compact Size

Belleville disc springs can support high loads with relatively small deflections compared to other spring types. This high load capacity in a compact form factor is advantageous in pressure switches where space may be limited.

Adjustable Operating Force

By using Belleville springs with application-specific properties, the operating force and deflection characteristics of the pressure switch can be finely tuned. This flexibility allows for precise control over the actuation point of the switch.

Long Service Life

The resilience and durability of Belleville disc springs contribute to a long service life, even in applications with high cycling rates. This durability ensures that pressure switches maintain their accuracy and reliability over time.

Wide Range of Operating Temperatures

Belleville disc springs perform reliably over a wide range of temperatures, making them suitable for applications exposed to extreme heat or cold.

Tolerance to Impurities

Belleville disc springs can tolerate some degree of impurities and deformation without significant loss of functionality. This characteristic is beneficial in environments where the pressure switch might be exposed to contaminants.

Shock and Vibration Resistance

The inherent design of Belleville disc springs provides excellent resistance to shock and vibration. This makes Belleville disc spring-based pressure switches highly reliable in dynamic and challenging environments, such as in compressors, chemical, petrochemical, and heavy machinery applications.

Minimal Maintenance

The simple and robust design of Belleville disc springs requires minimal maintenance. This reduces the overall cost of ownership and increases the reliability of the pressure switch.

Quick Response Time

Belleville disc springs can react quickly to changes in pressure, ensuring that the pressure switch responds promptly to operating conditions. This rapid response is critical in applications where safety or system performance is dependent on timely pressure regulation.

Predictable Behavior

The mechanical properties and behavior of Belleville disc springs under load are predictable, which facilitates trusted design, operation, and calibration of pressure switches.
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