172-65260m-05 (S-COS/S-COSR Pressure Reducing Valve) 27 Oct 2008
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5. Maintenance Space
Leave sufficient
space for
maintenance,
inspection and
repair.
(Unit: mm)
6. Trap Outlet Pipe (S-COS Only)
For ease of maintenance, installation of
a union connection is recommended for
the trap outlet pipe.
Connect the outlet pipe to a condensate
return line, or extend it to a trench. In
the case of the latter, make sure the
end of the pipe is above the waterline.
(Dirt and water may be sucked up by
the vacuum formed during trap closure
and system shutdown.)
7. Blowdown Valve (requires product with optional plug)
In an environment of heavy dirt or scale, or when the steam equipment is used
only periodically, such as for room heating equipment,
be sure to use a blowdown valve.
1. Remove the plug from the main body.
2. Install the blowdown valve.
3. Open the blowdown valve and blow any residual dirt
and scale off of the screen.
4. Periodically activate the blowdown valve to keep the
system free of dirt and scale.
8. Piping Size
If it is expected that the secondary steam flow velocity will be more than 30 m/s,
install a diffuser in order to keep the flow velocity below 30 m/s. If the distance
between the reducing valve and the steam equipment is great, a possible drop in
pressure should be taken into consideration when selecting the piping size.
Straight-run Piping Lengths: Upstream = 10 d or more; Downstream = 15 d or more
(d = pipe diameter)
Diffuser
Small Hole
S-COS S-COSR
Remove the
¼” plug
(optional) and
install the
blowdown
valve.
