Mark 2000 angle valve is a compact, pneumatically operated on/off valve that is rated to five million cycles. It can be used on nearly any application including steam, gases, water and other liquids. Design is claimed to be smaller, lightweight, and more economical than other types of on/off valves. With pressures to 230 PSIG and many actuation methods, valve is available in an unlimited number of configurations. Qualitrol Corp. 1385 Fairport Rd. Fairport, NY, 14450-1309