According to the standards of the valve sealing pressure testing and performance testing.

    1.The principle

Ball valve opening and closing parts is a sphere, the sphere rotates around the body center line to achieve a valve open, closed.

     2.Applicable place

    Low pressure, small caliber pipeline used for cutting off water andchange the flow of water allocation or require rapid opening and closing of the place.

    3.Characteristics

   1).Small flow resistance;

   2).Simple structure;

   3).Small volume, light weight;

   4).Valve sealing surface material made of plastics, good sealing performance;

   5).Convenient operation, quick open and close, to facilitate remote control;

   6).Convenient repair, seals are generally activities, convenient disassembly and replacement;

   7).The fully open or fully closed, the ball and seat sealing surface and the dielectric isolation, through the media will not cause erosion of the valve sealing surface.

    4.Classification

    1).Common ball valve according to its principle of work is divided into floating ball valve, fixed ball valve, lift rod ball etc..

    2).Ball according to their channels can be divided into straight through position, three links and right angle type. After two kinds of ball valves for distribution of media and change the flow of media.

    5.Construction, installation points

     1).Location, height, must meet the design requirements of the import and export orientation, the connection should be firmly.

    2).All kinds of manual valve installed in the pipe insulation, handle are not down.

     3).The valve must be installed prior to visual inspection, the valve plate should be consistent with the provisions of GB 12220 existing national standards, "universal valve logo". The working pressure greater than 1 MPa and in the main pipe on the role played off valve, the installation should be carried out before the performance test the strength and tight, pass behind the prospective use.Strength test, the test pressure is 1.5 times the nominal pressure,duration of not less than 5min, the valve housing, packing should be no leakage. Tightness test, the test pressure is 1.1 times thenominal pressure; the test pressure shall comply with the requirements of GB 50243 standard in the test duration, the sealing surface of the valve without leakage.

     4).The valve between the flange and pipe flange design by pipinginstalled gasket.

     5).Belt drive mechanism of the valve, according to product instructions for the installation.

      Chinabase Machinery is a group of manufacturing facilities, offering one-stop solution for mechanical power transmission products in China. We can supply a full-range of power transmission products, such as Stainless Steel Chain, sprockets and plate wheels, pulleys, Cast Iron Chain,gearboxes, motors,Belt guides, couplings, Flange Coupling,gears and racks. Our product range also covers locking assemblies (clamping elements/locking device), taper bushes, QD bushes, bolt-on hubs, torque limiters, shaft collars, motor bases and motor slides, chain detachers, chain guides, universal joint, rod ends and yokes.