Products: Lift check refers to rely on the flow of the medium itself automatically open and close the valve, relying on its own weight and fluid pressure valve for automatic valves to prevent backflow of fluid medium, also known as check valves, check valves, backflow valve, and back pressure valve. Check valves are an automatic valve, whose main role is to prevent the media back, to prevent the pump and drive motor reversal, and discharge the container medium. Pressure valve which can also be used to exceed the system pressure may rise auxiliary systems provide supply pipeline. Applications: flange lift check valve for nominal pressure PN1.6 ~ 16.0 Mpa, temperature petroleum, chemical, fire station and other -29 ~ 550 ℃, the various pressures of small-diameter pipeline, temperature and media control opening and closing device connect or disconnect the line media. Applicable medium: water, oil, steam and so on. Structural features: 1. valve product design and manufacturing according to GB / T 12235 design, manufacturing and testing, reliable sealing, excellent performance. 2. The valve seat sealing surface using Stellite (stellite) cobalt-based alloy cladding made of wear-resistant, high temperature, good anti-abrasion performance, long service life. 3. can be a variety of standard pipe flanges and flange sealing surface types to meet various project needs and user requirements. The full range of body materials, packing, gaskets according to actual working conditions or user requirements reasonable matching can be applied to all kinds of pressure, temperature and medium conditions. 5. Users can request to create different forms and connection forms the structure of the check valve, using a variety of equipment. Standards: the design and manufacture standard: GB / T 12235-2007 structural length standard: GB / T 12221-2005 connection flange standard: GB / T 9113 Pressure temperature rating: GB / T 12224-2005 Test inspection standards: GB / T 13927 -2008 lift valve performance specifications: Body material Nominal pressure (MPa) Operating temperature (℃) Suitable medium carbon steel 1.6-6.4 ≤425 water, oil, steam 10.0,16.0 ≤450 / stainless steel P 1.6-16.0 ≤ 200 nitric acid R / / acetic acid type chromium nickel-titanium heat-resisting steel PI 1.6-6.4 ≤550 petroleum, petroleum products Cr-Mo steel 1.6-16.0 ≤550 oil component materials and operating conditions: name body parts, valve cover, valve seal side rocker pin spacer part material surfacing alloy steel chrome stainless steel flexible graphite +304 main dimensions and weight: said pressure PN Nominal Diameter DN main connection dimensions Dimensions LDD 1 D 2 D 6 bff 1 Z -φd H 1.6MPa 40 200 145 110 85 - 16 2 - 4-18 95 50 230 160 125 100 - 16 2 - 4-18 105 65 290 180 140 120 - 18 2 - 4-18 120 80 310 195 165 135 - 20 3 - 8-18 130,100,350,215,180 155--203--8-18 140,125,400,245,210 185--223--8-12 155,150,480,280,240 210--243--8-23 180,200,600,335,295 265 - 263--12-23215 lift valve installation and use 1 lift check valve to be blocked at both ends of the path, there is a dry and ventilated room. If long-term storage should always check the anti-rust. 2. Lift check valve installed before the valve should be cleaned, and eliminate defects caused during transport. 3. The installation must be carefully checked flag and nameplate on the valve meets the requirements.