Single Stage Regulators

Go Regulators

The PR-1 Series is a versatile pressure reducing regulator designed to fulfi ll a wide range of needs in instrumentation sample systems and other applications such as semiconductor processing gases. Many features of the PR-1 make it ideal for a wide range of applications controlling pressures at low to moderate flows in gas or liquid service. 316L body material is used to facilitate welded connections. Stainless steel caps and adjusting screws prevent atmospheric corrosion and maintain appearance. Enhanced internal body surface fi nish of better than 25 Ra plus electropolishing allows easier cleaning and potentially less particle contamination in the flow stream.

Five diff erent seat materials, three alternate orifi ce sizes and seven pressure control ranges with stainless diaphragms off er the user a wide spectrum of capabilities for pressure control with inlet pressures up to 6000 psig and standard operating temperatures up to 500degF (260degC).

Features and Specifications:

  • Gas or liquid service
  • 316L stainless steel, Inconel, PTFE, and Tefzel (or optional main seat material choice) only in flow stream
  • Electropolished 316L body with better than 25 Ra diaphragm cavity surface finish
  • Stainless steel cap with SS adjusting screw
  • Inlet pressures of up to 6000 psi
  • Adjustable outlet pressure ranges of 0–10, 0–25, 0–50, 0–100, 0–250, 0–500 and 0–750 psig
  • Operating temperatures of -40degF up to +500degF (-40degC up to +260degC)
  • 20 micron filters
  • Bubble-tight shutoff under most conditions
  • Cv flow coefficients 0.025, 0.06, 0.20, and 0.50 (0.06 standard)


  • Wetted materials of construction: Monel, Hastelloy, and titanium
  • Diaphragm attached poppet
  • Special fi ttings
  • Diaphragm assist spring for vacuum purging
  • Panel mount (13/8? mounting hole)
  • Relief valves
  • Special diaphragm assembly for water service
  • SS inlet pressure gauges
  • SS outlet pressure gauges
  • Base-mounting brackets
  • Captured vent
  • Self-relieving





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Fast Turnaround
Fast Turnaround
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Our local stocks allow us to quickly respond to requirements for regulators. Boiswood can evaluate and repair regulators the same day they are returned and despatch back out on a next-day delivery service.
Local Technical Support
Local Technical Support
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Boiswood offer a technical helpline from our HQ as well as having a “man on the ground” for on-site support whenever and wherever this is required.
In-House Repair Centre
In-House Repair Centre
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We can offer manufacturer certified in-house evaluation, repair, testing and assembly of GO regulators from within our Boiswood workshop.
Training Services
Training Services
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We offer a range of educational classes and training seminars that can be delivered from Boiswood HQ or on-site. We can deliver a bespoke seminar tailored for your needs.