Swagelok, Integral Pilot-Operated Dome-Loaded Pressure-Reducing Regulator, RD(H)20, 25
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RD (H) 20, 25 Series Regulator

Brand: Swagelok Company

These pressure-reducing, dome-loaded and air-loaded regulators are suitable for most gases and liquids, including acids and oils.

These regulators feature various poppet designs, a pressure-sensing diaphragm, and a choice of seat and seal materials to accommodate a variety of pressure, temperature, and flow conditions.

The RDH series regulators are high-pressure versions of the RD series regulators.
Features
  • Balanced poppet design
  • Diaphragm sensing
  • Integral pilot regulator with dynamic regulation
  • Dome-to-outlet pressure ratio approximately 1:1
  • Large dome for improved stability
  • Pilot regulator for improved performance
  • External feedback (EF) for improved performance
    • EF to main regulator limited by standard outlet pressure range
    • EF to pilot regulator limited to 290 psig (20.0 bar) 
  • Maximum Inlet Pressure:
    • RD - psig: 1,015 psig (bar: 70, kPa: 6,998); psig: 507 (bar: 35, kPa: 3,496) with LRS4 pilot regulator
    • RDH20 - psig: 5,800 (bar: 400, kPa: 39,990)
    • RDH25 - psig: 4,060 (bar: 280, kPa: 27,990) 
  • Maximum Outlet Pressure:
    • RD - psig: 1,015 (bar: 70, kPa: 6,998)
    • RDH - psig: 2,900 (bar: 200, kPa: 19,990) 
  • Sensing Type: Diaphragm
  • Temperature Range: -20 to 80°C (-4 to 176°F)
  • Flow Coefficient: 13, 21 Cv
  • Connections:
    • Inlet/Outlet: 2, 2 1/2" NPT, ISO/BSP parallel thread, EN or ASME Flange
    • Gauge: Use P1 gauge connection of pilot regulator
    • Dome: 1/4" ISO/BSP Parallel Thread 
  • Construction Material:
    • Body: 316L Stainless Steel
    • O-Ring: Fluorocarbon FKM, Nitrile, EPDM
    • Dome: 316L Stainless Steel
    • Poppet: 316L Stainless Steel
    • Diaphragm: EPDM, FKM, Nitrile
    • Seat Seal:
      • RD: EPDM, FKM, Nitrile
      • RDH: PEEK, PCTFE

Specifications

Brand

Ambient Temperature Range

  • -20° to 80° C (-4° to 176° F)

BSP Connection

  • 2" BSPP Female - ISO
  • 2-1/2" BSPP Female - ISO

Diaphragm Material

  • EPDM
  • Fluorocarbon (FKM)
  • Nitrile

Elastomers

  • EPDM
  • Fluorocarbon
  • Nitrile

Enclosure, Body Material

  • 316L Stainless Steel

Feedback

  • External Feedback to Main Regulator
  • External Feedback to Pilot Regulator
  • No Feedback

Flange Size - 2-1/2” (DN 65)

  • 2-1/2" (DN 65) - 150#
  • 2-1/2" (DN 65) - 1500#
  • 2-1/2" (DN 65) - 2500#
  • 2-1/2" (DN 65) - 300#
  • 2-1/2" (DN 65) - 600#
  • 2-1/2" (DN 65) - PN 16
  • 2-1/2" (DN 65) - PN 40

Flange Size - 2” (DN 50)

  • 2" (DN 50) - 150#
  • 2" (DN 50) - 1500#
  • 2" (DN 50) - 2500#
  • 2" (DN 50) - 300#
  • 2" (DN 50) - 600#
  • 2" (DN 50) - PN 16
  • 2" (DN 50) - PN 40

Flange Type

  • Raised Face Smooth
  • RTJ - Ring Typical Joint

Flow Rate

  • 13 Cv
  • 21 Cv

Media

  • Gas
  • Liquids & Gases

NACE & NIST

  • NACE MR-0175, ISO 15156

NPT Connection

  • 2" NPT Female
  • 2-1/2" NPT Female

O-Ring Material

  • Ethylene Propylene (EPR)
  • FKM
  • Nitrile

Poppet Material

  • 316L Stainless Steel

Pressure Range

  • bar: 0 to 200
  • kPa: 0 to 19,990
  • psig: 0 to 2,900

Seat / Seal Material

  • 316L Stainless Steel
  • EPDM
  • Fluorocarbon (FKM)
  • Nitrile
  • PCTFE
  • PEEK

Special Cleaning & Packaging

  • ASTM G93 Level C-Cleaned
  • Not Required

Supply Pressure - Maximum

  • bar: 35 to 399.9
  • kPa: 3,496 to 39,990
  • psig: 507 to 5,800

Documentation

Data Sheets

Catalogs

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