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Fisher Controls Information Center
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McKinney, TX 75069-8004


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www.emersonprocess.com/regulators
Engineered Pressure and Flow Control Solutions

Type 63EG-98HM Relief Valve or Backpressure Regulator

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Type 63EG-98HM Pilot-Operated Relief Valve or Backpressure Regulator
The Type 63EG-98HM pilot operated relief valve or backpressure regulator is used for gas or liquid applications. For applications up to 450°F (232°C), the Type 63EG-98HM utilizes high temperature ethylenepropylene (EPR) or Kalrez™ elastomers for Class VI shutoff. If used in a corrosive service, Kalrez™ and other elastomers are available options that offer superior resistance to heat and most corrosive chemicals. 
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Features
  • High capacity
  • Highly versatile
  • Fast response time
  • Noise reduction option
  • Chemically compatible elastomers
  • Wide material selections
  • NACE construction available
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Body Size and End Connection Styles
  • 2-inch (DN 50) body with NPT, ANSI Class 150 RF, 300 RF, 600 RF, or PN 16/25/40 flanged end connections
  • 3, 4 or 6-inch (DN 80, 100 or 150) body with ANSI Class 150 RF, 300 RF, 600 RF, or PN 16/25/40 flanged end connections
  • 8 x 6-inch (DN 200 x 150) body with ANSI Class 150 RF or 600 RF flanged end connections
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Maximum Inlet Pressure
450 psig (31 bar) or body rating limit, whichever is lower
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Maximum Differential Pressure
400 psig (28 bar)
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Relief Set Pressure Ranges
15 to 375 psig (1,0 to 25,9 bar) in five ranges
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Temperature Capabilities

Fluoroelastomers (FKM): 0º to 300º F (-18º to 149º C)

Kalrez™:  0º to 450º F (-18º to 232º C)

Ethylenepropylene (EPDM):
Steel: -20º to 350º F (-29º to 177º C)
Stainless Steel: -40º to 350º F (-40º to 177º C)

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Approximate Weights (including pilot)

2-inch (DN 50) body: 55 pounds (24,9 kg)
3-inch (DN 80) body: 95 pounds (43,1 kg)
4-inch (DN 100) body: 145 pounds (65,8 kg)
6-inch (DN 150) body: 330 pounds (150 kg)
8 x 6-inch (DN 200 x 150) body: 630 pounds (286 kg)

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Additional Technical Data
For additional technical information, contact your Local Sales Office or refer to technical documentation.
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Within the US:
1-800-558-5853

Outside the US:
1-972-548-3574

Fax:
1-972-547-3712

Emerson Regulator Division Information Center
P.O. Box 8004
McKinney, TX 75069-8004




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