The Fisher CS800 Series direct-operated, spring-loaded regulators with overpressure protection options is ideal for industrial applications needing accurate control, fast speed of response and easy maintenance. It is available with flanged or threaded end connections, outlet pressure settings from 3.5 in. w.c. to 7.5 psig (9 to 515 mbar), orifice sizes from 1/4-in. (6.4mm) to 1 3/8-in. (35mm), and the option for internal or external pressure registration.