Fluid damped check valve, and associated systems and methods

A check valve assembly, comprising:

• a housing including—
• an inlet port;
• an outlet port;
• a flow chamber fluidly coupling the inlet port to the outlet port;
• a damping chamber;
• a leak chamber positioned between the flow chamber and the damping chamber;
• an outlet channel fluidly connected to the leak chamber, wherein the outlet channel is positioned to pass fluid flow from the leak chamber to outside the housing;
• a piston assembly extending at least partially through the flow chamber to the damping chamber, wherein the piston assembly is movable between a closed position and an open position, and wherein the piston assembly is positioned to sealingly engage the housing in the closed position to fluidly disconnect the inlet port from the outlet port;
• a biasing member operably coupled to the piston assembly, wherein the biasing member is configured to bias the piston assembly to the closed position;
• and
• at least one sealing member between the piston assembly and the housing, wherein the at least one sealing member is positioned to fluidly disconnect the flow chamber from the damping chamber.

A check valve assembly, comprising:

• a housing including—
• an inlet part;
• an outlet port;
• a flow chamber fluidly coupling the inlet port to the outlet port;
• a damping chamber;
• a pressure equalization chamber;
• a first leak chamber positioned between the flow chamber and the damping chamber;
• and
• a second leak chamber positioned between the damping chamber and the pressure equalization chamber;
• and
• piston assembly extending at least partially through the flow chamber, the damping chamber, and the pressure equalization chamber, wherein the piston assembly is movable between a closed position and an open position, wherein the piston assembly is positioned to sealingly engage the housing in the closed position to fluidly disconnect the inlet port from the outlet port, and wherein the piston assembly includes a bore extending between and fluidly coupling the flow chamber with the pressure equalization chamber.

A check valve assembly, comprising:

• a housing including—
• an inlet port configured to receive a flow of an operating fluid;
• an outlet port;
• a flow chamber fluidly coupling the inlet port to the outlet port;
• a damping chamber positioned to receive a damping fluid, wherein the damping fluid is less compressible than the operating fluid;
• and
• a pressure equalization chamber;
• and
• piston assembly extending at least partially through the flow chamber, the damping chamber, and the pressure equalization chamber, wherein the piston assembly is configured to move from a closed position to an open position when a pressure of the operating fluid at the inlet port exceeds a threshold value to permit the operating fluid to flow from the inlet port to the outlet port, wherein the piston assembly is positioned to sealingly engage the housing in the closed position to fluidly disconnect the inlet port from the outlet port, and wherein the piston assembly includes a bore extending between and fluidly coupling the flow chamber with the pressure equalization chamber.

A check valve assembly, comprising:

• a housing including—
• an inlet port;
• an outlet port;
• a flow chamber fluidly coupling the inlet port to the outlet port;
• a damping chamber;
• and
• a leak chamber fluidly coupled between the flow chamber and the damping chamber;
• a piston assembly movably positioned within the housing,
• wherein the piston assembly is movable between a closed position and an open position,
• wherein, in the closed position, the piston assembly seals the flow chamber to fluidly disconnect the inlet port from the outlet port, and
• wherein, in the open position, the inlet port is fluidly connected to the outlet port;
• a first sealing member positioned to at least partially fluidly disconnect the flow chamber from the leak chamber;
• and
• a second sealing member positioned to fluidly disconnect the damping chamber from the leak chamber.