10000PSI ultra-low temperature butterfly shaped check valve

Abstract

Disclosed is an ultra-low temperature butterfly check valve which is 10000PSI or equal to 70MPa; the check valve comprises a valve body (1), a valve cover (10), a middle flange gasket (6) and a seal component which are both arranged between the valve body (1) and the valve cover (10); the valve cover (10) is fixed on the valve body (1) through a bolt and a nut; two channels respectively sealed by a pair of valve flaps (2) are arranged in the valve body (1); the seal component is constructed that wear resistant gaskets I, II, III (12,13,14) are arranged between the valve flaps (2) and a spring base (11) nested with a spring (5), then the resistant gaskets, the valve flap and the spring base are nested a shaft (4); the left valve flap and the right valve flap (2) are driven by the spring (5) to rotate around the shaft (4), so as to seal the two channels in the valve body (1). The intensity test pressure of the check valve reaches 105MPa; the ultra-low temperature can reach -196 DEG C. the check valve is erosion resistant in 30 types of mediums which accounts for 26% in the approximate 116 types of medium such as the acid mediums; the erosion rate is less than 0.8mm annually; the ultra-low temperature butterfly check valve is a good product which is ultra-high pressure, ultra-low temperature and erosion resistant.

Description

Technical field [0001] The application of the present invention relates to a butterfly check valve, in particular to a 10000PSI ultra-low temperature butterfly check valve. Background technique [0002] Check valve is a one-way valve commonly used in industrial production, especially in offshore platforms and oil wellhead devices. For example, CN2063596U discloses a wafer butterfly check valve, which is composed of a tubular valve body with a lifting hole, a valve disc made of two semicircular plates, a torsion spring and a rubber valve seat. At the same time, since sealing rings are added at both ends of the valve body, it is not necessary to add sealing gaskets during installation, which can ensure a good seal. In addition, the valve is small in size (only about 1 / 4 of the swing check valve of the same specification). Light weight (about 1 / 3 of the same kind of check valve), easy to install or maintain, it replaces the general valve body that is currently commonly used in swing...

AI Technical Summary

Problems solved by technology

[0004] But these valves are not suitable for the pressure of about 10000PSI (equivalent to 70MPa), let alone the ultra-low temperature of about -196℃

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