Floating ball valve dedicated to high-pressure steam

Abstract

The invention relates to a floating ball valve dedicated to high-pressure steam and belongs to the technical field of valves. The floating ball valve dedicated to high-pressure steam comprises a valve body, a ball and a valve rod. A first metal valve seat is arranged on one side of a medium inlet end of the valve body, and a second metal valve seat is arranged on one side of the outlet end. The first metal valve seat and the second metal valve seat are attached to the ball to form a metal seal pair. A valve seat compression ring is arranged outside the first metal valve seat, and a disc spring is arranged between the valve seat compression ring and the first metal valve seat. Seal pre-tightening pressure can be set by adjusting compression force of the disc spring. The floating ball valve dedicated to high-pressure steam is good in seal property, low in leakage rate, outstanding in abrasion resistance, convenient to assemble and disassemble, and applicable to working conditions with high working pressure and bad working conditions; besides, for the current situation the current situation that the leakage rate of steam valves in China is high and medium-and-low-pressure steam valves are dominated in China, the floating ball valve can well make up the gap.

Description

technical field

[0001] The invention relates to the technical field of valves, and more specifically, the invention relates to a special floating ball valve for high-pressure steam. Background technique

[0002] Since the high-temperature water vapor is easy to generate hydrogen and mix with the oxygen in the plant to cause an explosion, the floating ball valve for high-pressure steam is required to have higher wear resistance and sealing performance. The development of domestic steam valves started relatively late compared with foreign advanced countries. At present, the production of medium and low pressure steam valves is still the main product, with low parameters, poor performance, short life, and poor test methods. Most of them cannot meet the needs of the domestic market. High-parameter products are basically imported, but imported valves have disadvantages such as expensive prices, long production cycles, and high operating costs. In the traditional steam valve, the...

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