Body PA66 Inner VITON Type Spring+Stainless Steel Opening Pressure =2 Kpa Back Pressure =500 Kpa Common Inner Material Silicone/NBR/VITON/FVMQ/EPDM Common Body Material PP/ABS/PA66/PVDF Common Port Size 1/4'', 1/8'', 1/16'', 3/8'', 3/16'', 5/16'' Experience 5-year History Certificate ISO9001: 2008 Our factory support OEM/ODM, confirm the details as follows, then we will help you design a perfect valve or we can introduce a similar valve that in stock: 1) Where does the valve you use in? 2) What kind of medium the valve come into contact with? Water, air, gasoline, lubricator or other? 3) What is your using temperature? Note: The 1)2)3) will make us choose the best material to make the valve for you. 4) What is the working pressure about the valve you require? 5) What is the rate of flow? 6) What is the opening pressure? 7) What is the max back pressure? 8) What is the approximate size of the valve? Such as diameter, ID and OD. 9) What is your annual quantity?