A check valve is provided for use with, for example, variable frequency drives and other applications without the valve becoming misaligned. In one aspect, the valve includes a housing with an inner surface and a passage. A flange within the housing divides the housing into upstream and downstream portions, and extends around the inner surface, defining a valve seat and a valve aperture. A poppet is positioned in the downstream portion. The poppet includes a valve head and a stem extending from the valve head and into the downstream portion, and not through the valve aperture. The valve head is resiliently biased in the closed position against the valve seat to inhibit fluid flow in a first direction. A guide disposed within the housing receives the stem of the poppet valve as the poppet valve moves between an open position and a closed position. The guide is secured into place by a spring clip. The spring clip is uniquely configured to provide multiple functions to, for example, engage with the inner surface of the housing and an outer surface of the guide to securely retain guide and poppet within passage during operation of valve and allow the guide and the poppet to float during variable flow conditions.

A check valve is provided for use with, for example, variable frequency drives and other applications without the valve becoming misaligned. In one aspect, the valve includes a housing with an inner surface and a passage. A flange within the housing divides the housing into upstream and downstream portions, and extends around the inner surface, defining a valve seat and a valve aperture. A poppet is positioned in the downstream portion. The poppet includes a valve head and a stem extending from the valve head and into the downstream portion, and not through the valve aperture. The valve head is resiliently biased in the closed position against the valve seat to inhibit fluid flow in a first direction. A guide disposed within the housing receives the stem of the poppet valve as the poppet valve moves between an open position and a closed position. The guide is secured into place by a spring clip. The spring clip is uniquely configured to provide multiple functions to, for example, engage with the inner surface of the housing and an outer surface of the guide to securely retain guide and poppet within passage during operation of valve and allow the guide and the poppet to float during variable flow conditions.

A pressure relief valve includes a housing, a poppet, and a spring. The housing includes an internal bore defined along a longitudinal axis of the housing and extending from an upper portion to a lower portion. A ledge or seat is defined within the bore. At least one lower portion hole is defined from an outer surface of the lower portion and into the bore. At least one upper portion hole is defined from an outer surface of the upper portion and into the bore. The poppet is slidably engaged within the internal bore. The poppet includes a head, a shaft, and an internal channel that runs longitudinally through the entire poppet. The head includes a shoulder. The spring is disposed within the bore at the upper portion of the housing and biases the poppet downwards so that the shoulder abuts the ledge or seat.

Flow control valves may be positioned downstream of water meters to increase pressure and compress entrained water vapour passing through the meters. However, turbulence within such valves can cause the valve's head to move radially, bending a shaft within the valve which may break. Accordingly, there is provided a flow control valve comprising: a housing having a flow passage; a valve seat defined within the flow passage; a valve head moveable to a closed position to engage the valve seat and seal the flow passage; a shaft secured to the valve head; a support slidingly mounting the shaft within the housing; a spring biasing the valve head to the closed position and configured to maintain the valve head in the closed position until a predetermined pressure is applied; and a guide assembly extending along at least a portion of the flow passage to constrain radial movement of the valve head.

A damped check valve having multi-pressure operation is provided. The check valve includes a liner with a poppet movable within the liner. The liner defines a flow passage aligned along a longitudinal axis defined by the liner. A biasing element is operably coupled between the poppet and the liner to bias a first flow face of the poppet against an annular seat. The first flow face is configured such that a first fluid pressure is required to move the poppet from the closed position to an open position wherein the poppet is unseated from the annular seat and a second fluid pressure is required to hold the poppet in the open position, the second pressure being less than the first pressure. There is a sufficient diametrical clearance between the poppet and the liner which allows for flow control at pressures which are less than the initial opening pressure.

A check valve is provided which comprises a casing having a fluid passage, a valve seat member disposed in the fluid passage, and a valve element housing with a valve element disposed therein. The valve seat member has a valve seat surface on an end surface facing downstream. The valve element housing is a discrete member separate from the valve seat member and detachably secured to a downstream end portion of the same. The valve element is displaceable between a closed position and an open position.

A check valve is provided which comprises a casing having a fluid passage, a valve seat member disposed in the fluid passage, and a valve element housing with a valve element disposed therein. The valve seat member has a valve seat surface on an end surface facing downstream. The valve element housing is a discrete member separate from the valve seat member and detachably secured to a downstream end portion of the same. The valve element is displaceable between a closed position and an open position.

A charge valve assembly for an air conditioning system includes a valve housing having a first end, a second end, and an inner surface defining a cavity. A valve core assembly is received in the cavity of the valve housing through the second end of the valve housing. The valve core assembly has a first end, a second end, a flow channel extending from the first end of the valve core assembly to the second end of the valve core assembly, an inner sealing surface, and a pin slideably received in the flow channel between an open position and a closed position. The pin has a primary seal selectively engaging the inner sealing surface of the valve core assembly and closing the flow channel at the second end of the valve core assembly when in the closed position. The pin biases towards the first end of the valve housing.

Flow control valves may be positioned downstream of water meters to increase pressure and compress entrained water vapour passing through the meters. However, turbulence within such valves can cause the valve's head to move radially, bending a shaft within the valve which may break. Accordingly, there is provided a flow control valve comprising: a housing having a flow passage; a valve seat defined within the flow passage; a valve head moveable to a closed position to engage the valve seat and seal the flow passage; a shaft secured to the valve head; a support slidingly mounting the shaft within the housing; a spring biasing the valve head to the closed position and configured to maintain the valve head in the closed position until a predetermined pressure is applied; and a guide assembly extending along at least a portion of the flow passage to constrain radial movement of the valve head.

A valve member assembly includes a housing, a check valve assembly, and a float valve assembly. The housing is a cup, a retainer and a bonnet releasably secured together. The check valve assembly is positioned within the cup, and the float valve assembly is positioned between the bonnet and the retainer. The valve member assembly can be easily assembled and inserted into a valve body.