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                                          Advanced Specialty Gas Equipment

                                          SG6537, SG6547 Series
                                          DELIVERY SYSTEM ACCESSORIES
                                          SG6537, SG6547 Series
                                          Flashback Arrestors for Regulators and Point of Supply

                                          The SG6537 and SG6547 Series Flashback Arrestors are designed to provide protection against flashback of fuel gas or oxygen. The SG6537 Series is constructed of brass and the SG6547 Series is constructed of Type 316L Stainless Steel. These arrestors are compact in design and provide the following safety elements when used in a delivery system: 100 micron filtration, reverse flow check valve, flame barrier and thermal cut-off valve.

                                          The SG6537 and SG6547 Series arrestors are commonly installed downstream of regulators and on supply lines. They are listed by Underwriter Laboratories to U/L 23Y5and can be used to help meet ANSI Z49.1.1999, OSHA and NFPA safety requirements.

                                          Standard Features
                                          • 100 Micron Stainless Steel Inlet Filter helps prevent contaminants from blocking check valve and provides extended service life.
                                          • Check Valve prevents hazardous back flow of gas into regulator or supply line.
                                          • Flame Barrier extinguishes flash back within housing and prevents flame from reaching gas supply.
                                          • Thermal Cut-Off Valve positively shuts off gas flow in the event of downstream fire reaching the arrestor.

                                          Specifications
                                          Approvals/Specifications: ISO 5175,
                                            BS 6158, EN 730 (BAM/DIN), AS 4603

                                          Maximum Service Pressure: 285 psig
                                            For U/L 23Y5 Std. Limits

                                          Operating Temp Range: -20° to 140°F

                                          Flow Capacity

                                          Inlet Connection: 1/4" NPT female

                                          Outlet Connection:
                                            SG6537: 1/4" NPT female
                                            SG6547: 1/4" NPT male

                                          Dimensions:
                                            SG6537: 7/8" Max OD x 3 5/8" long
                                            SG6547: 1 1/4" Max OD x 3 7/8" long

                                          Approximate Weight:
                                             SG6537: 6 oz.
                                             SG6547: 12 oz.

                                           

                                          Materials of Construction
                                          Body
                                          Seat and Seals:
                                             SG6537 Series: Neoprene
                                             SG6547 Series: Viton® (other elastomers available    on special order)
                                          Other Metal Parts Exposed to Gas: Stainless Steel

                                           

                                          Table I, Air Flow Capacity
                                          Inlet Pressure Pressure Drop Air Flow (scfh)
                                          (psig) (psig) SG6537 SG6547
                                          10 5 130 250
                                          20 10 250 500
                                          30 15 400 750
                                          50 22 660 1100
                                          100 22 950 1700

                                          Table II, Part Number and U/L 23Y5 Standard Pressure Limits

                                          Part No. Body Material Gas Service Working
                                          Pressure (psig)
                                          SG6537-F Brass Acetylene 15
                                              Hydrogen 50
                                              LPG 50
                                                 
                                          SG6537-O Brass Oxygen 145
                                                 
                                          SG6547-F Type 316L SS Acetylene 15
                                              Hydrogen 50
                                              LPG 50
                                                 
                                          SG6547-O Type 316L SS Oxygen 145
                                           

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