Gas Flow Solutions

Pilot Operated Regulators

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Pilot Operated Regulators

Tight accuracy at high capacity, using the gas stream itself as the control amplifier.

In the GR-P a small pilot regulator senses outlet pressure and modulates loading pressure on the main diaphragm. That amplification lets a large main valve be driven by a very small error signal, so the unit holds accuracy class AC 1 across a wide turndown. It is the standard selection for district stations, custody-transfer skids and any installation where downstream equipment is intolerant of pressure drift.

Features

  • •Two-path pilot circuit with adjustable restrictor for stability tuning
  • •Accuracy held to AC 1 across the working range
  • •Balanced main plug largely immune to inlet-pressure variation
  • •Pilot serviceable while the main body stays in line
  • •Accepts monitor (standby) pilot for fail-to-set-point redundancy

Key features

  • Two-path pilot circuit with adjustable restrictor for stability tuning
  • Accuracy held to AC 1 across the working range
  • Balanced main plug largely immune to inlet-pressure variation
  • Pilot serviceable while the main body stays in line
  • Accepts monitor (standby) pilot for fail-to-set-point redundancy

Applications

  • City-gate and district regulating stations
  • Custody-transfer metering skids
  • Large industrial plant intake
  • Power-station fuel-gas conditioning

Technical specifications

Confirmed against your duty at order stage — send us the operating conditions and we will verify the selection.

Pilot Operated Regulators specifications
ParameterValue
Inlet pressure1 – 100 bar
Outlet pressure0.1 – 40 bar
SizesDN 25 – DN 300
Accuracy classAC 1 – AC 2.5
Lock-up classSG 2.5 – SG 5
ConnectionsPN16 – PN100 flanged, ANSI 150 – 600
Body materialCast steel or ductile iron
Temperature range−20 °C to +60 °C (−40 °C option)

Technical documents

Datasheets, installation manuals, drawings and conformity declarations.

  • GR-P Pilot Operated Regulator — Technical DatasheetDatasheet · PDF · on request
  • GR-P Pilot Operated Regulator — Installation & Maintenance ManualManual · PDF · on request
  • GR-P Pilot Operated Regulator — Dimensional DrawingDrawing · DWG / PDF · on request
  • GR-P Pilot Operated Regulator — Declaration of ConformityCertificate · PDF · on request

Documentation for Pilot Operated Regulators is issued on request against the confirmed specification. Request the document pack.

Low Pressure Regulators

Gas Pressure Regulators

Low Pressure Regulators

Final-stage reduction to appliance pressure, sized for the millibar end of the network.

Enquire about this product

The more detail you give on the duty, the more precise the proposal comes back.

Request a quotation

Tell us the duty and we will come back with a sized proposal for Pilot Operated Regulators (GR-P).

Frequently asked questions

What engineers most often ask when specifying this equipment.

A monitor is a second regulator in series held at a slightly higher set point. It does nothing in normal service but takes over if the primary fails open, capping downstream pressure without shutting off supply. It is common where an interruption is more costly than the extra hardware.