Usage condition

1. Temperature and pressure limit, please reference to the nameplate to see the
   appropriate usage range of temperature and pressure.
   
2. Fluid：Non-corrosive fluids are fit for use. If the fluid is corrosive, please
   contact with the manufacturer or ordering demand.
   
3. Installation demand
   1. Installation regarding to the flow direction, please see the cast direction
      of check valve body. (see Fig. 1 )
      

      Fig. 1.

      
      
   2. It can be installed in vertical piping.
      
   3. In the horizontal piping, please install the valve vertically according to
      the Fig. 2.
      

      ○ YES	× NO	× NO
      Fig.2.

      
      
   4. When installing wafer Check near an elbow, leave a space as large as
      possible between an elbow and Wafer Check Valve and be sure that
      the plate is stressed evenly. (see Fig. 3)
      

      ○ YES	× NO
      Fig.3.

      
      
   5. Avoid entering the end of a tube or gasket within the opening area of a radius
      of the wafer Check plate. (see Fig. 4 )
      

      Fig.4.

      
      
   6. It will affect the turbulence, vibration, and abrasion within pipes when
      considering the flow. We suggest the pipes be installed by 5D-5D .
      ("D" means the diameter of the pipes.)(see Fig. 5 )
      

      Fig.5.

Maintenance Instruction

1. Please check the spring, main parts of the valve, whether it is broken.
2. Please check the abrasion of the parts of the valve.
3. Please check the action of the valve whether it's action interfere with other parts.
4. If it is necessary to replace the parts of the valve, Please disassemble and assembly
   the valve according to the figure below.
5. If the valve is metallic, please clean and wash it after disassembling according to
   the figure below.
6. For the safety consideration, please check the wall thickness and clear it once a year.



	Part Name 1 Body 2 Plate 3 Spring 4 Hinge Pin 5 Stop Pin 6 Body Bearing 7 Plate Bearing 8 Spring Bearing 9 Plug 10 Eye Bolt
Fig.7.






Warning:

Please be sure that there is no high pressure and temperature within the piping system, when you disassemble the valve for maintenance or replacement from the piping system. The rupture of the body happens easily, when the temperature and pressure are exceeding normal range. Seriously, it will cause human demage and the piping of usage system failure. It's necessary for user to choose the appropriate material of body to meet the requirement of the fluid type, pressure and temperature. If a serious leakage happened when piping system operate, please replace a new one immediately and contact Astam people. If the piping system is operating, don't touch the valve or you might get hurt. If there is unknown noise and vibration happened when the piping system operates after installation. Please check if the installation the method is followed the instruction provided by Astam.

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