American made valve Quality Assurance: Every unit is tested 100% or undergoes 2.5 AQL sample testing, in accordance with API 527 standards. Certifications: Marked with the UV and NB symbols to indicate certification. Set Pressure Tolerances: ±3% of the specified pressure. Temperature Range: -65°F to 400°F. Construction: Features a seat cap and piston made from C360 brass (ASTM B-16), a 17-7 stainless steel spring, and a silicone seal. 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