A thermally compensated bore guide system for a shaft, the shaft configured to translate along a longitudinal axis, is provided. The thermally compensated bore guide system includes an inner bore defined within a component. The inner bore is configured to circumferentially surround at least a portion of the shaft, wherein the inner bore is non-linear in response to the thermally compensated bore guide system being at a first thermal condition and wherein the inner bore is configured to be linear and to define a bore axis substantially aligned with the longitudinal axis in response to the thermally compensated bore guide system being at a second thermal condition.

An electronic expansion valve with high flow control precision, comprises a valve seat (1) and a valve rod (3). A through groove (11) penetrating the top and bottom of the valve seat is formed on the valve seat (1). A bearing seat (2) matching the through groove is inserted in the through groove (11). The bearing seat (2) includes a seat body (23), a through hole, (21) passing through the seat body, is formed in the seat body (3), and the through hole (21) matches the valve rod (3). An internal thread segment (24) is formed in the middle of the inner wall of the through hole (21). A matched straight tube is welded to the bottom of the through groove (11). The outer wall of the valve seat (1) is provided with a side hole communicated with the through groove (11), and a matching elbow pipe (4) is welded to the side hole. An isolating sleeve (10) is welded to the outer wall of the valve seat (1). A magnetic rotor (6) is provided outside the upper end of the valve rod (3) and a second circular groove (27) and a rectangular valve port (26) are formed on the outer wall of a lower end opening of the seat body (23). The electronic expansion valve can not only eliminate the lateral pressure generated by the valve rod under air pressure, but also improves the flow control precision, and therefore, the control and adjustment of the system are facilitated, and costs are reduced so as to meet market requirements.

A bypass system has a source of a fluid to be cooled and a heat exchanger for selectively cooling fluid. A piston is moveable along an axis allowing movement of a valve poppet toward and away from the valve seat. The piston moves with a rigid seal carrier. The rigid seal carrier and the piston move within a valve housing. A wax element is disposed on an opposed axial side of the rigid seal carrier relative to a chamber, such that the wax element expands as a temperature of the fluid to be cooled increases, and causes the valve poppet to move against the valve seat. A bypass valve is also disclosed.

A bypass system has a source of a fluid to be cooled and a heat exchanger for selectively cooling fluid. A piston is moveable along an axis allowing movement of a valve poppet toward and away from the valve seat. The piston moves with a rigid seal carrier. The rigid seal carrier and the piston move within a valve housing. A wax element is disposed on an opposed axial side of the rigid seal carrier relative to a chamber, such that the wax element expands as a temperature of the fluid to be cooled increases, and causes the valve poppet to move against the valve seat. A bypass valve is also disclosed.

A valve assembly includes a body having a fluid inlet disposed on a first end of the body and a fluid outlet disposed on a second end of the body in fluid connection with the fluid inlet. The valve assembly further includes a push-to-connect fitting which is integral to the body and configured to connect to an end of a pipe, a stem configured to seal the body in a first position and configured to allow fluid to flow from the fluid inlet of the body to the fluid outlet in a second position, and a connector surrounding at least part of the push-to-connect fitting. The body is configured to house a sealing ring. The push-to-connect fitting is configured to communicate the fluid inlet with the end of the pipe. The sealing ring secured by the push-to-connect fitting is configured to provide a seal between the fluid inlet and the end of the pipe.

A valve assembly includes a body having a fluid inlet disposed on a first end of the body and a fluid outlet disposed on a second end of the body in fluid connection with the fluid inlet. The valve assembly further includes a push-to-connect fitting which is integral to the body and configured to connect to an end of a pipe, a stem configured to seal the body in a first position and configured to allow fluid to flow from the fluid inlet of the body to the fluid outlet in a second position, and a connector surrounding at least part of the push-to-connect fitting. The body is configured to house a sealing ring. The push-to-connect fitting is configured to communicate the fluid inlet with the end of the pipe. The sealing ring secured by the push-to-connect fitting is configured to provide a seal between the fluid inlet and the end of the pipe.

A steam valve includes a housing defining a steam inlet and steam outlet in fluid communication with a valve cavity, and an annular valve seat disposed within the valve cavity. A control valve is configured to selectively engage the valve seat. The steam valve further includes a stop valve configured to selectively engage the valve seat. The steam valve includes a pressure seal head configured to receive the stop valve. The pressure seal head includes an elongated body having a bore extending longitudinally through the body; and a nose piece extending from an end of the elongated body. The nose piece has at least a tapered end portion and a bore extending longitudinally therethrough. The bore of the nose piece is longitudinally with the bore of the elongated body. The nose piece is formed of a first material which has greater erosion properties than a second material forming the elongated body.

A steam valve includes a housing defining a steam inlet and steam outlet in fluid communication with a valve cavity, and an annular valve seat disposed within the valve cavity. A control valve is configured to selectively engage the valve seat. The steam valve further includes a stop valve configured to selectively engage the valve seat. The steam valve includes a pressure seal head configured to receive the stop valve. The pressure seal head includes an elongated body having a bore extending longitudinally through the body; and a nose piece extending from an end of the elongated body. The nose piece has at least a tapered end portion and a bore extending longitudinally therethrough. The bore of the nose piece is longitudinally with the bore of the elongated body. The nose piece is formed of a first material which has greater erosion properties than a second material forming the elongated body.

An electronic expansion valve with high flow control precision, comprises a valve seat (1) and a valve rod (3). A through groove (11) penetrating the top and bottom of the valve seat is formed on the valve seat (1). A bearing seat (2) matching the through groove is inserted in the through groove (11). The bearing seat (2) includes a seat body (23), a through hole, (21) passing through the seat body, is formed in the seat body (3), and the through hole (21) matches the valve rod (3). An internal thread segment (24) is formed in the middle of the inner wall of the through hole (21). A matched straight tube is welded to the bottom of the through groove (11). The outer wall of the valve seat (1) is provided with a side hole communicated with the through groove (11), and a matching elbow pipe (4) is welded to the side hole. An isolating sleeve (10) is welded to the outer wall of the valve seat (1). A magnetic rotor (6) is provided outside the upper end of the valve rod (3) and a second circular groove (27) and a rectangular valve port (26) are formed on the outer wall of a lower end opening of the seat body (23). The electronic expansion valve can not only eliminate the lateral pressure generated by the valve rod under air pressure, but also improves the flow control precision, and therefore, the control and adjustment of the system are facilitated, and costs are reduced so as to meet market requirements.