Valve, Chem-Vac™, Hi-Vac, Three Way, 0-8mm, Viton O-Ring. CHEM-VAC™ valve with three-way configuration for use in construction of manifolds, adapters, etc. Valve has a TFE plug with three o-rings, the tip o-ring making the primary seal on the precision formed tapered seat. O-rings on the non-rotating shaft form an excellent dynamic seal between the TFE plug and glass barrel. Supplied with Viton o-rings. See CG-935 for replacement plug, CG-537 for o-ring replacement kit, and CG-906 for glass portion only.