Inlet Check Valve Back Catalog number: CTS-21147 Availability: In the manufacturer's stock Price on request - + Recommended CTS-21089 Needle Seal (For pH 1-14, for operation up to 130 Price on request CTS-10573 Injection Valve Rotor Seal Price on request 11-4052 Needle Seal, SIL-30AC, SIL-30ACMP Price on request