3 INSTALLATION
WARNING
Do not touch the pressure reducing valve, safety valve (relief valve) or the
opening section on the pipe outlet side with your bare hand.
If there is steam present, you may be seriously injured.
Before supply of steam, check whether there will be any danger if the steam
reaches the end of the pipe and whether all the pipe joints have been connected.
CAUTION
Before installing the pressure reducing valve on a pipe, discharge all the steam
in the pipe and remove any dirt or scale that may keep the pressure reducing
valve from operating properly.
Pay attention to the following items when installing the pipes.
1) Remove the dustproof seals covering the inlet/outlet connecting sections of the
pressure reducing valve body.
2) Check the flow direction indicated on the side of the pressure reducing valve body.
3) Be sure to install sections of straight pipe that are at least 10 times longer than the
pipe diameter just before and after the pressure reducing valve (behind the reducer).
4) To avoid reducing the pressure before it reaches the valve, do not install pipes that
reduce the pipe size on the primary side.
5) Install a pressure gauge and a stop valve both before and after the pressure reducing
valve, and always install a bypass line.
Be sure to install a strainer on the primary side (normally 60 - 80 mesh, or 100 mesh in
places where there are lots of scale or dirt present). The strainer should be installed in
such a way that the screen will point sideways to avoid the accumulation of
condensate in the area of the screen. (Refer to the plumbing example described later.)
or longer
or longer
