Characteristics and Application of Water Seal Gate Valve

Water seal valve for working pressure 1.6 ~ 10.0mpa, operating temperature 0 ~ 425 ℃ thermal power plant backwater condensing system and oil, chemical requirements and atmospheric isolation of the pipeline, cut off or connected to the media, the media for: water, oil Products, steam and non-corrosive gases. First, the characteristics and uses 1, s / z series opening and closing flexible, rapid, reliable seal, usually with double gate flexible seal; 2, the product structure is simple, compact and reasonable, easy maintenance, long service life; 3, The opening and closing device for the pipeline must be in the fully open or fully closed state and can not be used for regulating the flow rate. 4. There are two ways of connecting the valve: flange and welding. The driving mode is manual and electric, and the structure is complicated. Valve sealing surface configuration can be divided into wedge gate valve and parallel gate valve, wedge gate valve single gate type, double gate type and elastic gate type. Parallel gate-type gate valve can be divided into single gate and double gate type. According to the thread position of the stem division, can be divided into Ming rod valve and dark rod gate valve two. Second, the design and manufacture of water seal gate valve design and manufacture: gb12234 flange size: gb9113 jb7490 pressure temperature: jb / t74 gb9131 structure length: gb / t12221 test and test: jb / t9092 gb13927 Third, the main performance specifications Nominal pressure mpa Shell strength test 1.0 1.6 2.5 4.0 6.4 10.0 Sealing test 1.5 2.4 3.8 6.0 9.6 15.0 Sealing test 1.1 1.8 2.8 4.4 7.0 11.0 Gas seal test 1.1 1.8 2.8 4.4 7.0 11.0 Scope of application Product type Applicable temperature (℃) Applicable medium carbon Steel ≤425 Water, steam, oil, non-corrosive gas alloy type ≤540 Main parts material Product Type Part Name Valve body, valve cover, bracket Valve stem gate, valve flap, sealing surface Valve seat sealing surface valve Rod nut packing alloy steel (i) wcb cr5mol 20cr1mo1va cobalt-based alloy carbide aluminum bronze flexible graphite carbon steel type (c) wcb 1cr13 or 2cr13 cr13 stainless steel or carbide stainless steel aluminum bronze flexible graphite