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Premier Control Technologies Flow, pressure, level and temperature solutions

General Service GSD

  • 5 x More precise than standard regulators
  • General service back pressure regulator
  • Available from 1/4" to 1" sizes
  • Highly accurate for low and high pressures
  • Liquid, gas or mixed phase applications
  • CV values up to 8.5

General Service GSD Back Pressure Regulator

Equilibar’s General service series back pressure regulators ensure fast and stable pressure control of gases, liquids, and mixed-phase fluids. A robust and rugged design utilizes a 2-piece bar-stock body construction, with sizes ranging from 1/4″ through to 1″. Common materials in stock are SS316L and PVC; with other available materials being PTFE, PVDF, and carbon steel.

Applications for the GS Series are common across a great many industry sectors however some notable examples would include fuel cell testing and vacuum applications.

Equilibar Back Pressure Regulators can be made from PTFE, SS316, Hastelloy, Zirconium, Titanium and more

Precision at Low and High Pressures

The GS Series are available with a great many different trims although GR (more efficient for the lower pressures) and NR (more robust for higher pressures) are perhaps most widely used. Your application engineer will recommend the best trim for your application.

The GSD2 series of back pressure controller is one of the most popular within the Equilibar general series. Standard wetted material is Stainless Steel 316/316L and options also include Hastelloy C276, Anodized Aluminium, and PVC.

The GSD2 is available with ¼" connections and is used in larger research applications whilst also being suitable for small industrial gas and liquid systems.


Common process applications and industrial uses include:

  • High flow catalysis
  • Pilot scale reactors
  • High viscosity media
  • Tubing extrusion
  • Fuel cell testing
  • Gas pressure regulator
  • High pressure regulator
  • Low pressure regulator
  • Extreme temperature applicaitons

Spend a moment to read our article about Back Pressure Regulation for Tank Blanketing and how the General Service GSD makes this process easier.

Other features

Port Sizes:

  • 1/4" (GSD2)
  • 3/8" (GSD3)
  • 1/2" (GSD4)
  • 3/4" (GSD6)
  • 1" (GSD8)

Typical Pressure Ranges:

  • 0 - 1 in WC
  • 0 - 10 in WC
  • 0 - 28 in WC
  • 0 - 5 psi
  • 0 - 10 psi
  • 0 - 20 psi
  • 0 - 30 psi
  • 0 - 60 psi
  • 0 - 100 psi
  • 0 - 150 psi
  • 0 - 200 psi
  • 0 - 250 psi
  • 0 - 300 psi
  • 0 - 400 psi
  • 0 - 500 psi
  • 0 - 750 psi

Temperature Rating

  • Up to 150C (Metallic Body, PTFE Diaphragm, Viton® O Rings)
  • Up to 200C (Metallic Body, Metallic Diaphragm, Viton® O Rings)
  • Up to 300C (Metallic Body, Metallic Diaphragm, Kalrez® O Rings)

Available in a variety of metallic or polymer materials.


The General Service GSD is widely used in the following industries:

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