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ACCESSORIES RELIEF/ CHECK VALVES PNEUMATIC ACCESSORIES RELIEF VALVE Application These relief valves are ideal for air service. The valve will weep slightly at set pressure and achive full lift and high flow by 110 percent of their rated set pressure. Features � Bubble tight at 95% of set pressure. � Easy to read color coded psig / bar labels. � Unique tamper resistant and staked adjusting screw. � Repeatable performance. � 100% factory tested. � Temperatures Range -320 to +212 F � Set pressures range from 25-600psi Flow Data for 1/4", 3/8" & 1/2" * 6pc minimum order for each Materials Relief Valves: size relief valve Body ............................................................Brass Set Presssure Flow PressureFlow Rate Spring...........................................................Stainless Steel PSIG PSIG SCFM Air 25 24 29 Seat Retainer.................................................Brass 50 55 52 Adjusting Screw...........................................Brass 100 110 93 Seat Disc (Below 140psi).............................Fluorosilicone 150 165 134 ( Above 140psi)............................Teflon 230 253 200 350 385 298 400 440 339 Also available with all stainless steel components. 450 495 380 500 550 421 Part # Pull Body A B C Relief Setting List Price Specify Relief Ring (NPT) Male Ht. (In.) Hex Setting "xxx" 28-390-xxx Yes 3.0 POR 1/4 28-391-xxx No 2.6 POR Brass Available in 28-392-xxx Yes 3.2 POR 7/8 settings from 1/2 28-393-xxx No 2.8 POR 17-600 psi. 28-394-xxx No Stainless 1/4 2.6 POR Steel 28-395-xxx No 1/2 2.8 POR 28-390-230 indicates part # 28-390 with a pull ring set at 230. CHECK VALVES *Only come in 25psi setting � A check valve specifically designed and manufactured for the car wash/pressure washing industry. � Unique two piece construction allows the user to dis-assemble the valve, clean and replace seals as necessary. � Both valves which are available in 1/4" and 3/8" NPTF contain O-rings of Viton7 and Buna-N for long-lasting durability. � Maximum operating pressure on each valve is 200 psi. � Cracking pressure is 5 psig. Part # Material Thread (Both Ends) A - Length (in) B - Width (in) List Price 28-396 ASTM B 16 Brass 1/4 NPTF 3.03 1.00 79.82 28-397 ASTM B 16 Brass 3/8 NPTF 3.03 1.00 96.14 28-398 303 Stainless Steel 1/4 NPTF 3.03 1.00 139.65 28-399 303 Stainless Steel 3/8 NPTF 3.03 1.00 154.13 See more check valves on page 151 IDLAND ETAL FG. CO. 270
Goodyear Rubber Products
