The key specifications of the Check Valve, 1 1/2" BSP are — Crack Pressure: 1Kgf/cm²; Max Working Pressure: 17 Kgf/cm² (250psi); working Temp.: -20 to 100°C; Working Fluid: Compressed Air. These specifications are based on the standard GEM Equipments design; always verify against your machine's requirement before use. GEM Equipments Pvt. Ltd. is an ISO 9001:2015 certified, India-based manufacturer (since 1984) of compressed air dryers, cooling towers, industrial chillers, and compressed air treatment accessories, headquartered in Coimbatore, Tamil Nadu.