SC Hydraulic Engineering GBT Series Two Stage – Single Acting Gas Booster

SC Hydraulic Engineering GBT Series Two Stage – Single Acting Gas Booster 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.

General Product Information

REQUIRES NO LUBRICATION
HIGH FLOW, MEDIUM PRESSURE
REMOTE CONTROL CAPABILITIES
OIL-FREE HIGH PRESSURE SECTION
NOMINAL PRESSURES UP TO 12,500-PSI
AIR OPERATED – DOES NOT REQUIRE ELECTRICITY

The GBT series is able to achieve higher compression ratios by combining the first and second stage with an interconnected hydraulic (gas) piston. Maximum outlet pressure is the supply pressure plus the drive area ratio times the area ratio of both hydraulic (gas) pistons.

SC Hydraulic Engineering GBT Series Two Stage

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)	A Inlet Port B Outlet Port	Static Outlet Stall Pressure	Minimum Inlet Gas Pressure (Ps)	Displacement Per Stroke (in3 per cycle)
GBT-15/30	15 Pa to 2500 psig (2)	9,000 psig	1/4″ NPT	30 Pa +2 Ps	50 psi (3.5 bar)	7.05
		620 bar	1/4″ NPT
GBT-15/75	3.5 Pa to 5000 psig (2)	20,000 psig	9/16″-18 (1)	75 Pa + 5 Ps	50 psi (3.5 bar)	7.05
		1,380 bar	9/16″-18 (1)
GBT-30/75	20 Pa to 6000 psig (2)	20,000 psig	9/16″-18 (1)	75 Pa + 2.5 Ps	100 psig (7 bar)	3.1
		1,380 bar	9/16″-18 (1)

(1) Coned and threaded high pressure connection for 1/4″ O.D. tubing.
(2) Limit maximum gas supply pressure by formula Ps max = factor * Pa to avoid interstage stall
(for example, for gas booster model GBT-15/30 the formula is: Ps max = 15*Pa).
(3) Maximum allowed working pressure for oxygen service boosters: 5,000-psi max.
(4) Maximum allowed working pressure for hydrogen service boosters : 6,000-psi max.
(5) Oxygen & hydrogen service boosters not available on all models. Contact factory for more information.

Refer to 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 table. Refer to Static Outlet Stall Pressure formula shown on 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)
GBT	Single Stage Double Acting

TABLE 2	Modification
Blank	No Modification
M402	Remote Pilot

TABLE 3	Cylinder Modification
Blank	Single Head

TABLE 4	Pressure Ratio Single or First Stage
5	GBT
15	GBT
30	GBT
75	GBT

TABLE 5	Pressure Ratio Second Stage
30	GBT
75	GBT

TABLE 6	Service Option
Blank	Standard
02	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.

Modification

M014 – Counter Port: This option provides a 5/8-18-UNF thread port on the air motor section of the pump for installing a mechanical cycle counter.

M402 – Remote Pilot: This option provides a 1/8” NPT female port for remotely controlling the start/stop of the pump by connecting an external air signal to actuate the air cycling valve.

SC Hydraulic Engineering GBT Series Two Stage – Single Acting Gas Booster

SC Hydraulic Engineering GBT Series Two Stage – Single Acting Gas Booster