Valco Instruments Co. Inc.'s microvolume diaphragm valve is designed for use in applications requiring minimal maintenance and long lifetime, making it suitable for the process industry, automated laboratory analyzers, and continuous-monitoring environmental analyses. Three configurations are available: a four port internal loop sample injector; a six port external loop sampling/switching valve; and a 10 port multifunctional diaphragm valve.
Lifetime for the DV22 can exceed 1,000,000 cycles at ambient temperature/300 psi or 500,000 cycles at 175 C/300 psi. The standard valve is for applications in which the sample is above ambient pressure, but it can also be used with sub-ambient pressures, such as when the sample is pulled through the valve by vacuum.
Actuator air—40 to 50 psi—is supplied to a side port with 10 to 32 female threads, permitting use of a variety of compression or barbed fittings. A three-way solenoid is required for actuation, which may be ordered separately.
Valco Instruments Co. Inc., www.vici.com