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Metal Seals

Aluminum seals locate on the centering ring groove (inner centering) or outside edge of the flange (outer centering) depending on the size. (Inner and outer centering versions are available for all NW flange sizes.) Aluminum knife-edges are compressed by the sealing surfaces of the mating flanges when the chain clamp or ISO claw clamp is tightened. The resultant seal has a helium leak rate of less than 1x10-11 standard cc/sec. and can be baked repeatedly to 150°C. 
  • Chain Clamps
  • NW metal seal
  • ISO metal seals
  • Large NW metal seals
Nor-Cal Products manufactures a full line of flanges, fittings and adapters for vacuum applications. We offer NW (KF), ISO, CF, ASA, Wire Seal and 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. 

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