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ISO-K / ISO-F Seals, Clamps & Bolt Kits

Single- and double-claw clamps make joining ISO-K flanges quick and easy. Nut and bolt kits are often the preferred option for other applications, including ISO-F flanges.

Whatever the case, elastomer O-rings in various compounds such as FKM, FFKM, Silicon, and Buna mounted over centering rings ensure the resultant seal is vacuum-tight and process chemistry compatible.

ISO Flange Assembly Instructions

Optional fastener flanges are joined around the periphery with clamps. Single-claw clamps join an OF flange to a tapped nonrotatable on a pump or gate valve. Double-claw clamps are used when a pair of OF flanges need to be joined. This fastening method allows the flange to be rotated for ease of component alignment.

ISO-K / ISO-F Seals, Clamps & Bolt Kits Features

  • Aluminum as well as 304 and 316 stainless steel centering rings
  • Metric and Imperial threaded fasteners
  • Over pressure and retainer spacer rings optional
  • Screened centering rings
Nor-Cal Products, Inc dba Pfeiffer Vacuum Valves & Engineering manufactures and provides a full line of flanges, fittings, and adapters for vacuum applications. We offer ISO-KF (NW), ISO-K, ISO-F, CF (Conflat), ASA, Wire Seal, and EVAC Chain Clamp style flanges and fittings to fit almost every application. Custom flanges are available upon request.

We specialize in manufacturing components from 304 or 316 stainless steel, with several items available in aluminum as well. Centering rings, gaskets, clamps, bolts, and other hardware components are available to complete your project. We maintain a large inventory for prompt deliveries and to meet those unexpected demands.

PV V&E's Capabilities

Our team includes elite designers and engineers, who are dedicated to producing the highest quality, ISO 9001:2015-Certified ISO-K / ISO-F Seals, Clamps & Bolt Kits to meet your application requirements. Our strong in-house standards and capabilities support the quality of our components and the services we provide, including:

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