Drop check valve

Details Drop check valve Drop check valve

1976-04-06

1977-08-02

Weakley, Harold W.

Fluid handling

Line condition change responsive valves

Direct response valves

1374546, 13754319, F16K 1502

Patent

active

040390039

ABSTRACT:
A drop check valve for choke and kill manifolds which has easily replaceable components therein. The valve apparatus includes a bonnet which houses a replaceable seat member within which a dart is reciprocatingly received. The dart has a seat engaging surface formed thereon which is a frustum of a cone and moves lengthwise of its axis when closing against a conical seat of the removable seat assembly, so that the dart engages the seat to prevent bidirectional fluid flow therethrough.
A replaceable seal circumferentially extends about the cone of the dart to improve the sealing action between the dart and its seat. The seat assembly is provided with radially spaced-apart ports connected to an outlet passageway and fluid flow can only occur through an inlet passageway, up through the seat, into the seat assembly, through the radial ports, and out through the outlet passageway.

REFERENCES:
patent: 2845085 (1958-07-01), Robbins
patent: 3074382 (1963-01-01), Alfieri
patent: 3330294 (1967-07-01), Manning
patent: 3580275 (1971-05-01), Hanson
patent: 3913615 (1975-10-01), Cooper

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