The Type-700BP Back Pressure Regulator is a high flow, highlyaccurate pneumatic relief valve with an adjustable set point.It's primary function is to provide protection against over pressurization in the downstream portion of a pneumatic system.This precision unit is capable of handling flows up to 50 SCFM.A rolling diaphragm provides the sensitivity that causes the Type-700BP to vent to atmosphere in response to the slightest upstream changes. > SENSITIVITY - Provides quick response to controlled systempressure variation.? HIGH FLOW CAPACITY - Flows up to 50 SCFM (dependingon set point pressure and port size).? COMPENSATING FLOW CONTROL - Venturi type velocity-pressure tube adjusts main control valve opening in accordance with velocity pressure variations of flow from controlled system.? ON-LINE MAINTENANCE - Unit can be disassembled andserviced without removing from the air line. > The Type-700BP is used in place of a standard relief valve to provide protection against excessive build-up in supply pressure lines to instruments and other sensitive control devices.The most common application is to control the air pressure in asystem supplied by a compressor.Used in conjunction with a diaphragm operated inlet restricting valve and a bleed orifice, the Back Pressure regulator relieves excess compressor pressure while activating the intake restricting valve.When the regulator shuts off, the down-stream air vents through the bleed orifice allowing the restricting valve to open. > Flow Capacity . . . . . . . . . . . . . . . . . . . . . . .Up to 50 SCFM(85 m3/hr) depending on set point pressure and port size. > Sensitivity . . . . . . . . . . . . . . . . . . . . . . .1/8" (3.2 mm) water Maximum System Pressure . . . . . . . . .250 psig (1725 kPa) Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pipe or Panel Ambient Temperature . . . . . . . . . . . . . . . . . . . .0հF to 150F Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5 lb (.68 Kg) Materials of Construction: Body;diecast aluminum alloy,baked enamel finish.Trim;acetal, brass, and plated steel.Knob; phenolic plastic. >