Resilient metal seal for check valve
A one-way valve is provided. The valve provides a housing with a through hole having an upstream portion and a downstream portion. The upstream portion has a reduced diameter compared to the downstream portion. The housing contains a valve seat. A valve member, or poppet, moves within the through hole from a valve closed position and a valve open position. A low pressure facing side of the poppet engages an elastic member of a compression member that biases the poppet in the valve closed position. A high pressure facing side of the poppet engages a resilient metal seal in the form of an annular disc, which may have a generally wavy or undulating shape. The outer ends of the resilient metal seal are curved to releasably engages the valve seat.
1 . A poppet valve comprising,
a valve housing having a bore;
a tapered valve seat contained in the valve housing wherein the bore extends through the valve seat;
a valve element configured to selectively seat in the valve seat, the valve element having a high pressure facing side and a low pressure facing side;
an elastic member operatively engaged with the valve element to bias the valve element to engage the valve seat; and
a metal seal having a curved shape that is wavy to pre-load a seat interface operatively connected to the valve element on a side opposite to the elastic member and configured to engage the tapered valve seat when the poppet valve is closed to sealingly engage the tapered valve seat.
2 . The poppet valve of claim 1 wherein the metal seal is operatively connected to the valve element via a weld.
3 . The poppet valve of claim 2 wherein the valve element has a burr for the weld.
4 . The poppet valve of claim 3 wherein the metal seal has a perforation sized to cooperatively engage the burr for the weld.
5 . The poppet valve of claim 4 wherein the burr and perforation are located at the geometric center of the valve element and metal seal.
6 . The poppet valve of claim 1 wherein the metal seal is operatively connected to the valve element via a fastener.
7 . The poppet valve of claim 6 wherein the fastener is a rivet.
8 . The poppet valve of claim 1 wherein the metal seal is operatively connected to the valve element by being formed integral with the valve element.
9 . A poppet valve comprising,
a housing having a bore with a reduced diameter portion and a non-reduced diameter portion;
a valve seat contained in the valve housing wherein the bore extends through the valve seat;
a poppet configured to selectively seat in the valve seat, the poppet having a high pressure facing side configured to engage the valve seat and a low pressure facing side;
an elastic member operatively engaged with the low pressure facing side of the poppet to bias the poppet to engage the valve seat; and
a resilient metal seal coupled to the high pressure facing side of the poppet opposite the elastic member, wherein the metal seal has a curved annular seat that selectively and sealingly engages the valve seat.
10 . The poppet valve of claim 9 wherein the resilient metal seal undulates.
11 . The poppet valve of claim 9 wherein the curved annular seat interface is preloaded to sealingly engage the valve seat.
12 . The poppet valve of claim 9 wherein the resilient metal seal has at least one perforation and the high pressure facing side has at least one burr aligned with the at least one perforation, and a weld couples the resilient metal seal to the high pressure facing side.
13 . The poppet valve of claim 9 wherein the resilient metal seal has a fastener bore and the poppet has an aligned poppet bore and the resilient metal seal is coupled to the poppet by a fastener that is in the fastener bore and the poppet bore.
14 . The poppet valve of claim 9 wherein the resilient metal seal is integral with the poppet.