Back pressure valves in 1/2" ans 1/4"

DESCRIPTION Back pressure valves using diaphragms are designed to protect pumping systems from over pressure damage caused by defective equipment or blockage in the pump system line. Yamatho's supplier is a manufacturer of high quality back pressure valves made from a variety of different materials to suit most needs.  In most cases we are able to ship within 2 – 3 days after receipt of order because of our extensive inventory. Order the mounting kit HERE! FEATURES Reliability and low cost. Adjustable from 15 to 150 psi. 2 port (standard) or 3 port (with gauge). Viton diaphragm standard (others available). Full range of chemically resistant wetted materials. Sizes from ¼” to 1” depending on model. Diaphragm back pressure valves operate when the pressure in the pumping system exceeds the preset pressure of the valve. The diaphragm is held against the valve seat by an internal spring. When the preset pressure is exceeded the diaphragm is forced up and the system fluid flows out the rel