SC Hydraulic Engineering is a leading manufacturer and designer of an ever-growing line of high-pressure, air-driven liquid pumps, as well as air and gas boosters which are being used in a variety of industries and applications.
Growing since 1953, we offer liquid pressures as high as 65,000 psig and can exceed 17,000 psig in gas pressures.

SC Hydraulic Engineering works internationally through distribution and with manufacturers. We are continually developing new products to meet a never-ending stream of newly emerging applications and will continue to meet tougher, more demanding requirements.
SC Hydraulic Engineering GB Series Gas Booster Single Stage
Product Information
- Low Flow, Low Pressure
- Requires No Lubrication
- Remote Control Capabilities
- Oil-free High Pressure Section
- Nominal Pressures Up To 7,500 psi
- Air Operated – Does Not Require Electricity
The GB series is the most economical of the SC Hydraulic Gas Boosters and is ideal for applications not requiring much volume such as pressure testing small vessels or components. Pressures can be boosted from as low as 50 psig and up to over 11,000 psig.
SC Hydraulic Engineering GB Series Application
- Laser Cutting
- Leak Detection
- Pressure Testing Vessels
- Low-Pressure Gas Recovery
- Charging Of Nitrogen Bottles
- Gas Assisted Injection Molding
- Aircraft Slide Chute Gas Storage
- Charging Of Nitrogen Accumulators
- Transfer Of Sf6 For Arc Suppression
- Transfer Of Sf6 For Circuit Breaker Insulation
- Boosting Pressure From Nitrogen Generators
Dimensions
Model No. | Maximum Material Rated Gas Supply Pressure (Ps) | Maximum Material Rated Gas Outlet Pressure (Po) | An Inlet Port B Outlet Port | Static Outlet Stall Pressure | Minimum Inlet Gas Pressure (Ps) | Displacement Per Stroke (in3 per cycle) |
GB-15 | 2,250 psig | 2,250 psig | 1/4″ NPT | 15 Pa | 50 psig (3.5 bar) | 7.05 |
155 bar | 155 bar | 1/4″ NPT | ||||
GB-30 | 4,500 psig | 4,500 psig | 1/4″ NPT | 30 Pa | 100 psig (7 bar) | 3.1 |
310 bar | 310 bar | 1/4″ NPT | ||||
GB-75 | 6,000 psig | 11,250 psig | 9/16″-18 (1) | 75 Pa | 250 psig (17 bar) | 1.2 |
410 bar | 775 bar | 9/16″-18 (1) |
- Coned and threaded high-pressure connection for 1/4″ O.D. tubing.
- Maximum allowed working pressure for oxygen service boosters: 5,000 psi max.
- Maximum allowed working pressure for hydrogen service boosters: 6,000 psi max.
- Oxygen & hydrogen service boosters are not available on all models. Contact the factory for more information.
Refer to the corresponding gas booster performance curve for operating pressures. Maximum material-rated outlet pressures can be reached under special operating conditions. Do not use air drive and/or gas supply pressures that equate to higher outlet pressures than those “maximum material rated outlet pressures” shown on the table. Refer to the Static Outlet Stall Pressure formula shown in the table (for example, for gas booster model GBD-30 the formula is: Static Outlet Stall Pressure = 30*Pa+Ps). Maximum recommended air drive operating pressure: 100 psi. Maximum-rated air drive pressure: 150 psi (only for static outlet stall pressure).
Ordering
TABLE 1 | Gas Booster Series (1) | ||
GB | Single Stage | ||
TABLE 2 | Modification | ||
Blank | No Modification | ||
M402 | Remote Pilot | ||
3 | EPR O-rings, Polyurethane Main Seal | ||
TABLE 3 | Cylinder Modification | ||
Blank | Single Head | ||
TABLE 4 | Pressure Ratio Single or First Stage | ||
5 | GB | ||
15 | GB | ||
30 | GB | ||
75 | GB | ||
TABLE 5 | Pressure Ratio Second Stage | ||
Blank | N/A on GB Series | ||
TABLE 6 | Service Option | ||
Blank | Standard | ||
2 | Oxygen Service (2) | ||
H2 | Hydrogen Service (2) | ||
Notes : | (1) Do not fill gap on a two digit description | ||
(2) Not available on GBD-D75, GBT-D15/75 and GBT-D30/75 models. Contact factory for more information. |
Performance Chart

Source : schydraulic.com
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