American made valve American made valve perfect for air compressors with high flow requirements Set Pressure Tolerances: ±3% of set pressure. Temperature Range:-65°F to 400°F Construction: Seat, cap, and piston: C360 brass (ASTM B-16). Spring: 17-7 stainless steel, Seal: Silicone Performance: Bubble tight within 5 PSI for set pressures ≤ 50 psig. Bubble tight within 10% for set pressures > 50 PSI 100% tested or 2.5 AQL sample testing, conforming to API 527. Stamped with UV and NB symbols All valves will have thread tape applied or supplied 6 month no hassle warranty Applications: Non Code Compact Size Low Flow Requirements Temperature Range: -65 F to 400 F Construction: Seat Cap and Piston C360 Brass (ASTM B-16), 302 Stainless Steel Spring and 440 Stainless Steel Ball No Audible Leak at 45% Set Pressure at 25-74 psig, No Audible Leak at 90% Set Pressure Above 74 psig Everseal 483 Sealant Standard