GB500E
16Pages

CONTENTS Principle of Operation, Benefits, Features, Typical Gas Booster Applications Why Use Air Driven Gas Boosters?, International Equivalents How Do Buyers Choose Between Gas Booster Models? Determining the Proper Gas Booster Model—Examples Gas Booster Selection Table and Notes Performance Curves Installation Dimensions, Weights Standard Modifications Hydraulics International, Inc. Overview Other HII Products

PRINCIPLE OF OPERATION An air (or gas) driven gas booster has a continuously reciprocating drive piston section directly connected to one or two gas boosting sections, as illustrated in Figure 1. The drive section includes a four-way air cycling valve and dual air pilot valves to provide the continuous reciprocation. Normally, start/stop control is accomplished by cutting off drive- or pilotair input. (For description of gas section operation, see Page 3, Volumetric Efficiency.) Maximum Gas Section Pressures vary by model and are detailed on Pages 6 and 7. Maximum Drive Section Pressure is...

WHY USE AIR DRIVEN GAS BOOSTERS? GAS PURITY: Most gases used in industry and life support must be clean and dry. Otherwise, the end use is severely compromised. Gases needing purity include argon(Ar), carbon dioxide(CO2), helium(He), hydrogen(H2), neon(Ne), nitrogen(N2), nitrous oxide(N2O), oxygen(O2) and breathing air. If gas purity is needed, all devices used to transfer gas or increase gas pressure must be completely dry and free of any lubricants. Hydraulics International, Inc.’s (HII’s) air driven gas boosters satisfy this requirement. No hydrocarbon lubrication is needed in the gas...

HOW DO BUYERS CHOOSE BETWEEN GAS BOOSTER MODELS? (continued) COMPRESSION RATIO Volumetric efficiency of gas boosters is affected by unswept space, internal leakage, and compression ratio. HII’s gas boosters are designed and manufactured to ensure unswept space is minimal and internal leakage is nonexistent. The compression ratio is therefore the most important factor to consider in selecting which HII model will provide the highest volumetric efficiency. To calculate or estimate the compression ratio, the outlet and inlet gas pressures must be known. If both outlet and inlet gas pressure...

DETERMINING THE PROPER GAS BOOSTER MODEL—EXAMPLES (continued) Example 3: You have a constant 4,000 PSI nitrogen supply (from an LN2 4,000 PSI pump and vaporizer); on a semi-monthly basis, you need to leak-check oil field valves to 17,500 PSI per API specification. Shop air drive pressure of about 100 PSI is available. Duty: moderate. Per Chart 2, Compress Factor for 17,500 PSI outlet is 550. Compress Factor for 4,000 PSI Inlet is 273 obtained by using Chart 2 or the Compress Factor for Inlet PSI equation (4014.7 PSIA/14.7 PSIA). HIGH PRESSURE VAPORIZER Compression ratio, worst case: 550...

TABLE 1. GAS BOOSTER SELECTION TABLE - SEE PAGE 8 FOR IMPORTANT NOTES TABLE 1.1. GAS BOOSTER SELECTION TABLE -- SEE PAGE 8 FOR IMPORTANT NOTES 8 FOR IMPORTANT NOTES TABLE 1. GAS BOOSTER SELECTION TABLE SEE PAGE 8FORIMPORTANT NOTES TABLE 1. GAS BOOSTER SELECTIONTABLE- SEE PAGEPractical PressuresIMPORTANT NOTES TABLE GAS BOOSTER SELECTION TABLE TABLE SEE PAGE FOR SafeMaximum Safe Actual TABLE 1. GAS BOOSTER SELECTION Stall Point: - - SEEPAGE 88 FORIMPORTANT NOTES Approximate TABLE 1. GAS BOOSTER SELECTION TABLEPoint: Approximate 95MaximumPressures Maximum Safe Actual - SEEBased on 8 FOR...

Port Detail Detail Port Out Approximate Envelope Approximate Envelope Dimensions—Inches Dimensions—Inches Length, Height, Width & Weight Length, Height, Width & Weight In (See Page 13 & 14 for more details) Model Designation System (See Page 13 & 14 for more details) 1/2” SAE(f) 1/2” 1/2” SAE(f) 1/2” SAE(f) SAE(f) BOX 4: Ratio—Two Stage Boosters Only Nominal First Stage Area Ratio/Second Stage Area Ratio BOX 5: Modifications (See Page 15) N - Lapped Cycling Valve Assembly O - Oxygen Gas Service to 5,000 PSI V - Viton Seals in the Air Drive Section X - External Pilot Port on Air Drive...

TABLE 1 NOTES TABLE 1 NOTES (a) Maximum safe pressure, (Page 6) is based on a minimum 4:1 safety factor of the Table 2. Net Ratios and Assist Factor of Two Stage Models Table 2. Net Ratios and Assist Factor Assist Factor Models of Two Stage Assist Factor Model No. Net Ratio Model Net Ratio First Stage to Second Stage Compression First Stage to Second Compression Assist Factor Model Net Ratio First Stage to Second Stage Compression 5G-TS-7/14 14:1 2:1 5G-TS-7/14 14:1 2:1 5G-TS-7/30 9.13:1 4.29:1 5G-TS-7/14 14:1 2:1 5G-TS-7/30 9.13:1 4.29:1 (a) Maximum safe pressure, (Page 6) is to this...

SINGLE UNIT prospective users—but the average of a number of outlet flow GAS OUTLET PRESSURE - PSI GAS OUTLET PRESSURE - PSI GAS OUTLET PRESSURE PSI GAS OUTLET PRESSURE --PSI GAS OUTLET PRESSURE - PSI GAS OUTLET PRESSURE - PSI Use the curves at a Pages 10-12 for rough estimates only; gas values on spread of inlet-outlet pressures is. See performance booster applications that have constant gas the equalized inlet and W TO USE THE PERFORMANCE CURVES curves (on left) for Model 5G-DS-30. If inlet and outlet pressuresoutlet pressure is 1,550 and 2 on Page 4 represent more are rare. Examples 1...

PERFORMANCE CURVES—Assume an air drive source of approximately 95 PSI from 1/2” ID piping. GAS OUTLET PRESSUREGAS OUTLET PRESSURE - PSI - PSI - PSI GAS OUTLET PRESSURE GAS OUTLET FLOW - SCFM GAS OUTLET FLOW - SCFM GAS OUTLET FLOW - SCFM GAS OUTLET FLOW - SCFM GAS OUTLET FLOW - SCFM AIR DRIVE FLOW (DOTTED CURVES) MODEL lines 10 represent approximate air drive consumption 20 30 (A) 15 SCFM15 (B) 30 SCFM 30 50 SCFM (D) 75 SCFM (C) 5G-SS/DS 50

PERFORMANCE CURVES—Assume an air drive source of approximately 95 PSI from 1/2” ID piping. GAS OUTLET FLOW - SCFM GAS OUTLET FLOW - SCFM GAS OUTLET FLOW - SCFM GAS OUTLET FLOW - SCFM GAS OUTLET AIR DRIVE FLOW (DOTTED CURVES) FLOW - SCFM MODEL lines represent approximate air drive consumption 10 20 30 (A) 15 SCFM (B) 30 SCFM (C) 50 SCFM (D) 75 SCFM 5G-SS/DS 15 30 50