are available from this manufacturer:

	General Specifications for Curtiss-Wright/Sprague's (formerly Teledyne Republic/Sprague) Gas Boosters
	TR/S pneumatic boosters offer a cost effective way to compress shop air or bottled gas to meet various requirements for higher pressure, lower volume air or gas.   Industrial applications include charging accumulators, inflating high pressure tires or charging shock struts from lower pressure supply sources; the transferring of gas from a supply cylinder to another container or actuating of air chucks in machine tools. Where production machinery or test setups require higher air pressure than normally provided by the shop air system, TR/S boosters can provide the extra muscle needed to operate the equipment.   Because of their compact size and low cost, TR/S boosters can be combined in high-low combinations to meet higher flow and pressure requirements. (see Flo-Matix Co. Air-Powered Hydraulic Boosters)   Being air-driven and having no electrical connections, TR/S pneumatic boosters are non-sparking. These boosters can be used safely in the presence of flammable or explosive liquids or vapors.   TR/s boosters and other TR/S pneumatic products are designed to a four to one minimum safety factor.   HOW THE TR/S BOOSTERS WORK the TR/S gas booster is a piston-type, air-operated booster. It uses a mechanically operated, snap-action, air selector valve to cycle the booster.   TR/S boosters, like TR/S air-driven hydraulic pumps, employ the piston differential areas principle - a large area air piston, driven at low air pressure to drive a small area compression piston which converts input gas to higher pressure, lower volume output gas.   The booster gas output or discharge pressure developed by the compression piston is determined by the ration between the area of the piston, the operating air pressure and the available precharge pressure. The function of the precharge pressure to the booster is to charge the high pressure cylinder inside the booster with gas, reducing the time to return the compression piston and the air piston for the next compression cycle.   The TR/S booster works rapidly to reach the required pressure then stops at a pressure balance. The booster will hold the pressure balance indefinitely with minimal energy consumption, heat build-up or parts movement. When a pressure imbalance occurs, the booster will automatically restart to restore the pressure balance.   By using a pressure regulator on the operating air supply line, the outlet gas pressure can be accurately adjusted to any pressure level between the precharge pressure and the maximum discharge pressure.   With some TR/S booster models, the pumping or high pressure section is cooled with exhaust air piped from the air-driving section of the booster. In other boosters the pumping section employs external fins to dissipate the heat.   Compared to other air-operated gas boosters on the market, the TR/S booster does the same job but with fewer moving parts and seals, thus less maintenance is required over its service life.
	Gas Booster Model S-86-JN-( ) A competitively priced series of versatile gas boosters are offered in six popular design ratios.   These non-comtaminating gas boosters are suitable for use in cleanrooms or laboratories. Since these boosters are provided with self-lubricating dynamic seals, they can be driven with normal shop air, lubricated air, or with clean dry air, depending on the application. Being air-driven, these boosters are non-sparking and safe for use in hazardous areas. Pump ratio tables are below.
S-86-JN-( ) Pump Characteristics Ratio Code Driving Air Supply PSI Precharge Inlet Air Range-PSI Input Outlet Air Range-PSI) Port Size Driving Air Port Size Compressed Inlet & Outlet 2 25-200 25-450 50-450 1/2 NPT 3/8 NPT 5 25-200 50-1100 125-1100 1/2 NPT 3/8 NPT 15 25-200 100-3100 375-3100 1/2 NPT 1/4 NPT 30 25-200 200-6000 750-6000 1/2 NPT 1/4 NPT 60 25-100 200-6100 1500-6100 1/2 NPT 1/4 NPT 100 25-100 500-10,300 2500-10,300 1/2 NPT 1/4 NPT
	Two-Stage Gas Booster Model S-218B will safely boost gasses to high pressures (up to 4,500 psig) at high flow rates (up to 20 SCFM). A series of four heat exchangers keep compressed gasses cool and coupled with specially designed TR/S seals greatly extend seal life. The S-218B booster features a sealed drive system so that the booster may be driven with natural gas from gas transmission lines (normally 200 psig). This allows the user to compress the gas up to 4,000 psig to fill bottles for vehicular use. The exhaust gas from the drive system is directed to 50 psig residential or industrial transmission lines. No gas is wasted!

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