Brand: Rotork

Rotork Fairchild HPD / DHP / HPP High Pressure Regulators

Name: Rotork Fairchild HPD DHP HPP Regulators – Datasheet & Quote
Brand: Rotork
SKU: Fairchild HPD DHP HPP

Description

The Rotork Fairchild HPD, DHP and HPP regulators are a family of stainless steel high pressure regulators for gas or liquid service with supply pressures up to 6,000 psi. Rotork describes them as eliminating the leakage and short life of conventional high pressure regulators, using 316 stainless steel bodies, Inconel diaphragms or stainless pistons, and an improved valve seat seal. They regulate down to 0-25 psi output (HPD, DHP) or up to 0-3,000 psi (HPP).

Three regulator styles

Each style fits a different job:

HPD: diaphragm operated, with a 316 stainless body and Inconel diaphragm. Five output ranges run from 0-25 psi up to 5-500 psi (35 bar), and it is offered with a standard knob, a tamper proof actuator or a panel mount configuration.
DHP: a dome loaded, diaphragm operated version of the HPD, with the same body, diaphragm, supply rating and ranges, for systems where a pilot or dome pressure sets the output.
HPP: piston operated, all 316 stainless steel, for much higher output pressures with three ranges up to 3,000 psi (200 bar). The datasheet notes the supply pressure must always be higher than the required output.

Technical specifications

Parameter	Specification
Models	HPD (diaphragm), DHP (dome loaded diaphragm), HPP (piston)
Maximum supply pressure	6,000 psig (414 bar), subject to the seat material chart
Flow capacity (Cv)	0.06 or 0.25
HPD and DHP output ranges (psi)	0-25, 0-50, 1-100, 2-250 and 5-500
HPP output ranges (psi)	0-1000, 0-2000 and 0-3000
Supply pressure effect	0.6 psig per 100 psig change (HPD); under 2 psig per 100 psig change (HPP)
Ambient temperature	-40 to +500 degF (-40 to +260 degC), depending on seat material
Ports	1/4 inch; NPTF, BSPT or SAE AS5202-4; two port or four port
Body and valve	316L stainless steel
Diaphragm and seal	Alloy X-750 Inconel diaphragm (HPD); Viton A seal (HPP)
Shutoff	Bubble tight in most conditions with the non-relieving option

Seat material limits

Seat choice controls the pressure and temperature envelope, so read the seat chart on the datasheet before ordering. CTFE seats are limited to 3,500 psig and 175 degF (80 degC). PEEK and Vespel seats reach 500 degF (260 degC) at up to 3,500 psig, or 175 degF at up to 6,000 psig. The datasheet also states that temperatures above 175 degF require the tamper proof option.

Ordering options

Catalog numbers start with the model letters, then flow capacity (1 for Cv 0.06, 3 for Cv 0.25), a range code, port size and thread (N, U or S), port configuration (A for 2 port, B for 4 port), body material S for 316 stainless steel, seat material (P PEEK, T CTFE, V Vespel), actuator (K knob or T tamper proof), relief (R relieving or N non-relieving) and mounting (N none or P panel).

What to confirm

State whether the medium is gas or liquid, the supply pressure range, the required outlet pressure and flow, and the operating temperature, so the right style and seat can be matched. Where a safety relief device is needed downstream, specify it separately. The Rotork datasheet is attached; send Seven Star LLC the catalog number or the duty and we will prepare a quotation from our regulators range.

Datasheets & Documents

Datasheet Rotork Fairchild HPD DHP HPP High Pressure Regulators Datasheet Download

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About brand

Rotork is a British flow control company best known for electric valve actuators. Jeremy Fry founded Rotork Engineering Company in Bath in 1957, the year its first actuator, the 100A, went on sale, and the group is still headquartered in Bath and listed on the London Stock Exchange. Today Rotork makes electric, pneumatic, hydraulic and electro-hydraulic actuators, gearboxes, precision regulators and valve positioners.

Seven Star LLC is an independent supplier listing Rotork actuators, Rotork Fairchild regulators, YTC positioners and spare parts for buyers in Oman and the GCC. Replacement units are matched from the actuator nameplate and wiring diagram number.

Rotork company profile

Origin	Founded by Jeremy Fry in 1957 in Bath, England; first product the 100A valve actuator
Headquarters	Brassmill Lane, Bath, United Kingdom
Ownership	Rotork plc, a public company listed on the London Stock Exchange
Acquired brands	Fairchild precision pneumatic controls (2011, Winston-Salem, USA), YTC valve positioners (Young Tech Co., Seoul, 2014), Mastergear gearboxes (2016)
Product families	Intelligent electric actuators, control valve actuators, electro-hydraulic and fluid power actuators, gearboxes, precision regulators, positioners and network control systems

Milestones

1957: Jeremy Fry founds Rotork in Bath, England; the first product is the 100A valve actuator.
2011: Fairchild precision pneumatic controls (Winston-Salem, USA) is acquired.
2014: YTC valve positioners (Young Tech Co., Seoul) is acquired.
2016: Mastergear gearboxes is acquired.

Rotork actuators, regulators and positioners

Series	Type	Typical use
IQ3	Intelligent multi-turn electric actuator	Gate and globe valves, penstocks and sluice gates; non-intrusive setup with a Bluetooth setting tool, double-sealed enclosure, data logging
IQT3	Intelligent part-turn electric actuator	Ball, butterfly and plug valves and dampers, with the same setup and diagnostics as IQ3
CVA	Precision control valve electric actuator	Continuous modulating control of linear and part-turn control valves where instrument air is not available
CMA	Compact modulating electric actuator	Small control valves, chemical injection and metering pumps
Skilmatic SI3	Self-contained electro-hydraulic actuator	Spring-return fail-safe and ESD duty with partial stroke testing, needing only an electrical supply
GP / GH	Scotch yoke pneumatic (GP) and hydraulic (GH) actuators	Large quarter-turn valves on pipelines and ESD service; spring-return or double-acting
CP	Compact pneumatic quarter-turn actuator	Smaller on-off ball and butterfly valves on plant air
Fairchild 10, 30, 55, 66, M11, 81	Precision pressure regulators	Instrument air to positioners and actuators, test benches; Model 66 in stainless steel for corrosive and offshore sites
Fairchild 1000	No-bleed precision regulator	Saves instrument air or gas where continuous bleed is not acceptable
Fairchild 10BP, 4000ABP	Back pressure regulators	Holding upstream pressure in process and test systems
YTC YT-1000, YT-3300	Valve positioners	Electro-pneumatic (YT-1000) and smart HART (YT-3300) positioning of linear and rotary pneumatic actuators

Where Rotork equipment is used

Rotork actuators are common on oil and gas pipelines and terminals, refineries and gas plants, water and wastewater networks, desalination plants and power stations. Electric IQ actuators handle isolation valves on long pipelines and water mains, often networked over Rotork Pakscan, Modbus or another fieldbus. Skilmatic and scotch yoke actuators cover emergency shutdown valves, and Fairchild regulators and YTC positioners sit on pneumatic control valves throughout process plants.

Ordering Rotork actuators and spare parts: what we need

Send photos of the actuator nameplate with the model, serial number and wiring diagram number; the wiring diagram is usually inside the terminal cover. Rotork can identify the original build, including options and control interface, from the serial number. For a new application add the valve type and size, required torque or thrust, operating time, mounting flange (ISO 5210 or ISO 5211), power supply, control signal or network protocol, fail-safe requirement and hazardous-area marking. For regulators and positioners send the full model code and the pressure or signal ranges.

Facts checked against Rotork plc company information and product data, October 2026.

Browse Rotork products by category: Valve Actuator, Regulators, Valve Positioner.