To illustrate the butterfly valve installation

     一.Preparation before installation

     1.Should check the valve before installation specifications,materials and design is consistent.

      2.And in the installation of sand and dust before the internal,foreign bodies and miscellaneous debris clean up, so as to avoid the movement is not smooth or leakage.

      3.Prior to the installation of its associated piping should beregulation to make appropriate suspension fixed, in order to avoidafter the installation of the valve caused by stress improper.

      4.The piping between the two flange surfaces must be aligned parallel to the concentric.

      5.The installation of butterfly valve and flange gasket must be installed without.

      6.Butterfly valve and check valve or pump near the place, in the middle of the two expansion joint use, valve disc off torsion is not hindered.

      二.The installation steps:

    1.Before installing the valve plate to open 10 degrees. (before removing the same)

    2.In the appropriate position setting auxiliary screws, to adjust the distance between two flange.

     3.The butterfly valve to no contact with two flange insert alsopenetrated into the rest of the bolts.

      4.To determine the valve center and concentric flange center and the disc switch position not flange diameter or adjacent parts byprogressive block diagonal recurrent lock the bolt, until access to the valve flange face.

       5.Device should be completed after fully open and fully closedagain confirmed the degree.

Spring Chain Tensioner

     三.Operation:

      1.Before starting operation, air spray washing on the removal of foreign objects piping, clean water pipe inner surface.

      2.Open the valve view angle indicating dial, avoid torsion exceeds open width, the closed position must not exceed.

       3.Switch entirely to the indicator shall prevail, such as to dictate other hand tools, then angle indicating dial and switch will damage.

       4.To do with the pipe pressure test, valve should be opened.

      Long term valve in the fully closed state 5, piping, should make the switch 1~2 times in order to avoid fixing the situation monthly.

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