Chlorine and ammonia safety valve

Abstract

A safety valve for chlorine and ammonia relates to a special valve. Including valve body, valve seat, valve cover, valve stem, valve disc, the valve body includes inlet and outlet, the inlet of the valve body is set in the vertical downward direction, the outlet of the valve body is set in the horizontal direction, and the shape between the inlet and the outlet is Set at 90°, the inlet and outlet of the valve body are respectively provided with connecting flanges; a guide sleeve is installed at the assembly hole at the upper end of the valve body, and the guide sleeve is fixed between the valve body and the valve cover; the valve stem jacket in the valve cover To the spring, the spring seat, and the spring seat respectively cooperate and interfere with the two ends of the spring; the lower end surface of the valve disc and the upper sealing surface of the valve seat are closely matched in a detachable manner, and a special-shaped groove is set on the lower end surface of the valve disc, and the molding in the special-shaped groove is strengthened. Polytetrafluoroethylene resin, polytetrafluoroethylene resin is sintered in the special-shaped groove; hard alloy layer is surfacing on the sealing surface of the upper end of the valve seat. The valve has good anti-corrosion effect, erosion resistance, zero leakage, no frequency jumping and fluttering of the disc, safe and reliable, and no accidents.

Description

technical field [0001] The invention relates to a special valve, in particular to the technical field of manufacturing a safety valve for ammonia or chlorine. Background technique [0002] At present, most of the safety valves used in the desulfurization and denitrification working conditions of my country's chemical enterprises and power plants to control corrosive flowing media such as ammonia, liquid ammonia, and chlorine are ordinary safety valves. Due to the unreasonable design of the sealing connection form and valve structure, During use, the seals are easily damaged and fall off, the service life is short, and it is prone to leakage, resulting in frequency jump, flutter, jamming, etc., and even safety accidents, causing casualties and property losses. Frequent maintenance and replacement affect normal production and cause Economic losses. Contents of the invention [0003] In order to overcome the above-mentioned technical defects, the present invention provides a s...

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Problems solved by technology

[0002] At present, most of the safety valves used in the desulfurization and denitrification conditions of my country's chemical enterprises and power plants to control corrosive flowing media such as ammonia, liquid ammonia, and chlorine are ordinary safety valves. Due to the unreasonable design of the sealing connection form and valve structure, During use, the seals are easily damaged and fall off, the service life is short, leakage is easy to occur, frequency jumping, flutter, jamming and other phenomena occur, and even safety accidents occur, causing casualties and property losses. Frequent maintenance and replacement affect normal production and cause Economic losses

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