Orifice unit of a needle valve

Details Orifice unit of a needle valve Orifice unit of a needle valve

1975-08-12

1977-05-17

Weakley, Harold W.

Valves and valve actuation

With selective flow regulation

236102, 251DIG4, 251362, F16K 512

Patent

active

040237745

ABSTRACT:
An orifice assembly includes a cylindrical orifice unit formed of synthetic resin material and having at one end thereof an end wall with an orifice therethrough. A metallic needle is mounted for reciprocation in the orifice. The needle has an oblique surface which defines with the surface of the orifice a gap which is variable with reciprocation of the needle. A holder element, preferably of metal, surrounds and supports the orifice unit. An annular recess is provided, preferably in the outer surface of the orifice, radially outwardly of the orifice to allow expansion and contraction of the resin material, due to temperature variations, without constraint.

REFERENCES:
patent: 2610300 (1952-09-01), Walton et al.
patent: 2820473 (1958-01-01), Reiners
patent: 2821268 (1958-01-01), Bourcier de Carbon
patent: 2895500 (1959-07-01), Barnett
patent: 3330543 (1967-07-01), Mennesson
patent: 3387830 (1968-06-01), McIlroy

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