4. Fluid handling
  5. Line condition change responsive valves
  6. Bi-directional flow valves

Fred Knapp Engraving Co., Inc.

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Control valve with universal porting feature

Pipe joints or couplings – Convertible
Patent

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Pneumatic regulating valve

Fluid handling – Line condition change responsive valves – Bi-directional flow valves
Patent

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Quick-disconnect tube coupler with use-enhancing features

Pipe joints or couplings – With assembly means or feature – With holding means functioning only during transportation...
Patent

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Snap swivel coupling for fluid flow applications

Pipe joints or couplings – Swivel – Pipe in socket type
Patent

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