Equilibar’s GS back pressure valves provide stable pressure control for gases, liquids, and mixed-phase fluids in inlet/outlet port sizes from 1/4″ to 1″. Common materials in stock are SS316L and PVC; depending on your application needs, other materials available for order are Hastelloy C276, Titanium, Monel, Zirconium, Aluminum, CPVC, PVDF, PTFE and PEEK.
The GS Series comes in different trims to suit the process parameters. A GR trim is more efficient for the lower pressures and NR is more robust for higher pressures.
Common applications for the GS Series include fuel cell testing, continuous API manufacturing, pressure bypass control and high resolution flow control.
Contact an application engineer to discuss the requirements of your process.
Contact Us Technical Literature

GSD2 General Service Back Pressure Regulator
- Port Sizes:
- 1/4"
- 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
- Key Applications:
- High Flow Catalysis
- Pilot Scale Reactors
- High Viscosity Media

GSDM2 General Service Back Pressure Regulator
- Port Sizes:
- 1/4"
- Typical Pressure Ranges:
- 0 - 1000 psi
- Key Applications:
- High Flow Catalysis Research
- Pilot Scale Electrolysis
- Pilot Scale Reactors
- Liquid Fuel Recirculation Loops

GSDH2 General Service Back Pressure Regulator
- Port Sizes:
- 3/4"
- Typical Pressure Ranges:
- 0 - 1000 psi
- 0 - 1500 psi
- 0 - 2000 psi
- 0 - 2500 psi
- Key Applications:
- High Flow Catalysis Research
- Pilot Scale Reactors
- High Pressure Liquid Fuels

GSD3 General Service Back Pressure Regulator
- Port Sizes:
- 3/8"
- Typical Pressure Ranges:
- 0 - 1 in WC
- 0 - 10 in WC
- 0 - 1.4 psi
- 0 - 2 psi
- 0 - 5 psi
- 0 - 10 psi
- 0 - 20 psi
- 0 - 30 psi
- 0 - 60 psi
- 0 - 100 psi
- 0 - 150 psi
- 0 - 175 psi
- 0 - 200 psi
- 0 - 250 psi
- 0 - 300 psi
- 0 - 400 psi
- Key Applications:
- Fuel Pump & Systems Testing
- Fuel Cell Testing
- Pump recirculation pressure control

GSDM3 General Service Back Pressure Regulator
- Port Sizes:
- 3/8"
- Typical Pressure Ranges:
- 0 - 750 psi
- Key Applications:
- High Flow Catalysis Research
- Pilot Scale Reactors
- Liquid Fuel Recirculation Loops

GSDH3 General Service Back Pressure Regulator
- Port Sizes:
- 3/8"
- Typical Pressure Ranges:
- 0 - 500 psi
- 0 - 750 psi
- 0 - 1000 psi
- Key Applications:
- High Flow Catalysis Research
- Pilot Scale Reactors
- High Pressure Liquid Fuels

GSD4 General Service Back Pressure Regulator
- Port Sizes:
- 1/2"
- Typical Pressure Ranges:
- 0 - 1 in WC
- 0 - 10 in WC
- 0 - 2 psi
- 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
- Key Applications:

GSDM4 General Service Back Pressure Regulator
- Port Sizes:
- 1/2"
- Typical Pressure Ranges:
- 0 - 500 psi
- 0 - 750 psi
- Key Applications:
- High Flow Catalysis Research
- Pilot Scale Reactors
- Liquid Fuel Recirculation Loops

GSDH4 General Service Back Pressure Regulator
- Port Sizes:
- 1/2"
- Typical Pressure Ranges:
- 0 - 500 psi
- 0 - 750 psi
- 0 - 1000 psi
- Key Applications:
- High Flow Catalysis Research
- Pilot Production Reactors
- High Pressure Liquid Recirculation Loops

GSD6 General Service Back Pressure Regulator
- Port Sizes:
- 3/4"
- Typical Pressure Ranges:
- 0 - 1 in WC
- 0 - 10 in WC
- 0 - 2 psi
- 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
- Key Applications:

GSDM6 General Service Back Pressure Regulator
- Port Sizes:
- 3/4"
- Typical Pressure Ranges:
- 0 - 500 psi
- Key Applications:
- Precision Dosing Pressure Control
- Pump Recirculation Loops
- High Viscosity Media

GSDH6 General Service Back Pressure Regulator
- Port Sizes:
- 3/4"
- Typical Pressure Ranges:
- 0 - 1000 psi
- 0 - 1500 psi
- Key Applications:
- Reverse Osmosis
- Precision Dosing Pressure Control
- Pump Recirculation Loops
- High Viscosity Media

GSD8 General Service Back Pressure Regulator
- Port Sizes:
- 1"
- Typical Pressure Ranges:
- 0 - 1 in WC
- 0 - 10 in WC
- 0 - 28 in WC
- 0 - 2 psi
- 0 - 5 psi
- 0 - 10 psi
- 0 - 20 psi
- 0 - 30 psi
- 0 - 60 psi
- 0 - 100 psi
- 0 - 150 psi
- Key Applications:

GSDM8 General Service Back Pressure Regulator
- Port Sizes:
- 1"
- Typical Pressure Ranges:
- 0 - 150 psi
- 0 - 175 psi
- 0 - 200 psi
- 0 - 250 psi
- 0 - 300 psi
- 0 - 400 psi
- 0 - 500 psi
- Key Applications:

GSDH8 General Service Back Pressure Regulator
- Port Sizes:
- 1"
- Typical Pressure Ranges:
- 0 - 1000 psi
- 0 - 1500 psi
- 0 - 2000 psi
- Key Applications:
- Electrolysis gas stream pressure control
- Pump Recirculation Loops
- High Viscosity Media or polymer processing
Other Equilibar Back Pressure Products:



