Series 2700 balanced design pressure relief valves are designed for operations with variable backpressure where a balanced bellows design cannot be used. Balanced design valves achieve balanced effect by isolating upper valve chamber and eliminating any backpressure build-up in bonnet affecting valve set pressure. Valves are available in 1/2-, 3/4- and 1-inch inlet sizes with a 1-inch outlet and two orifice areas. Farris Engineering Division of Curtiss Wright Flow Control Corp. 10195 Brecksville Road Brecksville, OH, 44141