A valve assembly for a compressor, the valve assembly comprising: a seat plate defining a fluid passage; a guard plate having an additional fluid conduit an impact bushing formed of plastic and having a central guide supported by one or more arms, the impact bushing coupled to the seat plate configured as a linear bearing; and a sealing assembly configured to form a seal with the impact bushing and to control flow of a fluid through the fluid passage via relative displacement of the sealing assembly from the impact bushing, the sealing assembly comprising: a seal member comprising a poppet having a guide member protruding from an upper surface of the poppet; and a biasing member (52, 54, 56) to apply a force on the poppet towards the seat plate; wherein the central guide cooperates with the guide member to maintain alignment of the poppet during operation of the valve assembly; wherein the guard plate is coupled to the seat plate such that the sealing assembly is disposed between the guard plate and the seat plate; characterized in that the valve assembly comprises: an additional impact bushing formed of plastic coupled to the guard plate proximate the additional fluid conduit, the additional impact bushing configured to abut a lower surface of the poppet, opposite the upper surface, when the poppet is in a fully-opened position. a seat plate defining a fluid passage; a guard plate having an additional fluid conduit an impact bushing formed of plastic and having a central guide supported by one or more arms, the impact bushing coupled to the seat plate configured as a linear bearing; and a sealing assembly configured to form a seal with the impact bushing and to control flow of a fluid through the fluid passage via relative displacement of the sealing assembly from the impact bushing, the sealing assembly comprising: a seal member comprising a poppet having a guide member protruding from an upper surface of the poppet; and a biasing member (52, 54, 56) to apply a force on the poppet towards the seat plate; wherein the central guide cooperates with the guide member to maintain alignment of the poppet during operation of the valve assembly; wherein the guard plate is coupled to the seat plate such that the sealing assembly is disposed between the guard plate and the seat plate; characterized in that the valve assembly comprises: an additional impact bushing formed of plastic coupled to the guard plate proximate the additional fluid conduit, the additional impact bushing configured to abut a lower surface of the poppet, opposite the upper surface, when the poppet is in a fully-opened position. a seal member comprising a poppet having a guide member protruding from an upper surface of the poppet; and a biasing member (52, 54, 56) to apply a force on the poppet towards the seat plate; wherein the central guide cooperates with the guide member to maintain alignment of the poppet during operation of the valve assembly; wherein the guard plate is coupled to the seat plate such that the sealing assembly is disposed between the guard plate and the seat plate; characterized in that the valve assembly comprises: an additional impact bushing formed of plastic coupled to the guard plate proximate the additional fluid conduit, the additional impact bushing configured to abut a lower surface of the poppet, opposite the upper surface, when the poppet is in a fully-opened position.