Plast-O-Matic Series MFR is the answer for handling pure de-ionized rinse water where your hands must be free to handle the part being rinsed. They are also ideal for handling corrosive or other ultrapure liquids where economical performance is a prime consideration. Series MFR self-closing valves are normally-closed and require a minimum of palm, foot or knee pressure to open. Double u-cup seals are used on the shaft to isolate the spring from the process fluid. Maximum working inlet pressure of 150 psi @ 73°F. Series MFR valve bodies are made from Type 1, grade 1 PVC with seal materials in FKM and EPDM. The spring (non-wetted) is stainless steel.