Liquid Regulators

• Relief Valves/ Backpressure Regulators
  • 63EG-98HM
  • 98H / 98L
  • 98HH

Relief Valve / Backpressure Regulators

• 63EG-98HM
• 98H Series
• 98L Series
• Y695A
• Y696

Type 63EG-98HM Pilot-Operated Relief Valve or Backpressure Regulator

The Type 63EG-98HM can be used for gas, liquid, or steam applications. For applications up to 550°F (288°C), the Type 63EG-98HM utilizes high temperature ethylenepropylene (EPR) or Perfluoroelastomer (FFKM) for class VI shutoff. If used in a corrosive service, Perfluoroelastomer (FFKM) and other elastomers are available options that offer superior resistance to heat and most corrosive chemicals.

When using the Type 63EG-98HM with a corrosive liquid, usually water or a water-containing solution, the valve materials must be selected with care. For aqueous solutions, use a stainless steel linear cage or Whisper Trim® III Cage and body flange to ensure valve plug travel on a corrosion-free surface.

The Type 63EG-98HM is not an ASME certified device.

Features

• Variety of Construction Materials
• Low Build-up Capability
• Chemically Compatible Elastomers
• No Assembly Adjustments Required
• Fast Speed of Response
• Excellent Overpressure Protection
• NACE Availability
• Tight Shutoff
• Easily Converted to Differential Control
• Labor-Saving Trim
• Versatility in Both Liquid and Gas Service

Body Size and End Connection Styles

• NPS 2 (DN 50), NPT, ASME CL150 RF, CL300 RF, CL600 RF, or PN 16/25/40 flanged
• NPS 3, 4, 6 (DN 80, 100, 150) ASME CL150 RF, CL300 RF, CL600 RF, or PN 16/25/40 flanged
• NPS 8 x 6 (DN 200 x 150) ASME CL150 RF, CL300 RF, and CL600 RF flanged

Maximum Inlet Pressure
450 psig (31 bar) or body rating limit, whichever is lower

Maximum Differential Pressure
400 psig (27,6 bar)

Relief Set Pressure Ranges
15 to 375 psig (1,0 to 25,9 bar) in five ranges

Temperature Capabilities

• Fluorocarbon (FKM):
  • 0º to 300º F (-18º to 149º C) Not acceptable in water or steam in excess of 200°F (93°C)
• Ethylenepropylene (EPDM):
  • Steel: -20° to 350°F (-29° to 177°C)
  • Stainless steel: -40° to 350°F (-40° to 177°C)
• Perfluoroelastomer (FFKM):
  • Standard: 0° to 450°F (-18° to 232°C)
  • Optional: 0° to 550°F (-18° to 288°C)

Approximate Weights

• NPS 2 (DN 50): 65 Pounds (30 kg)
• NPS 3 (DN 80): 105 Pounds (48 kg)
• NPS 4 (DN 100): 155 Pounds (71 kg)
• NPS 6 (DN 150): 340 Pounds (155 kg)
• NPS 8 x 6 (DN 200 x 150): 630 Pounds (286 kg)