Valcor Scientific”s isolated solenoid valves (Series SV 51 and SV 73) use flexible diaphragms, or bellows, to isolate operating parts from the fluid being handled. Metal-to-fluid contact is eliminated, along with the contamination, corrosion, and clogging that can occur in valves with wetted parts. With all-Teflon construction and Polypropylene bodies, the valves come in two-way, normally closed and normally open, and three-way configurations. Seal materials include Viton, EPDM, and Teflon. Standard voltages are 24 VDC and 115 VAC/60 Hz, while pressures range from vacuum to 100 PSI and flowrates up to Cv 3.5.