Serving applications requiring all-PTFE wetted parts, pilot-operated back pressure regulator features machined virgin PTFE body that is available in 1/16 and 1/8 in. threaded port connections with max working pressures of 500 and 250 psi. Single moving part, sensitive flexible diaphragm, is used to sense media pressure and act as main regulating valve. Back pressure is controlled in precise, 1:1 relationship to pilot pressure, which may be controlled using two options.