172-65604MA-00 (
PN-COSR
Pneumatic Control Valve) 10 Sep 2014
16
Setting the pressure with the adjustment screw
Other than setting the secondary steam pressure of
PN-COSR-16
using air pressure, it can be set by the adjustment screw.
・
To Maintain minimum required pressure by adjustment screw
Set the steam pressure at the secondary pressure side to a
minimum required pressure using the adjustment screw.
・
When setting the pressure using only motive air
Loosen the adjustment screw until there is no load on the coil
spring. The valve should be closed once there is no motive air.
<Adjustment>
1. It is necessary to blow down all pipe lines thoroughly. The blowdown is especially
important if the line is new or has been shut down for a long period of time. Take
particular care to ensure that matter such as condensate and dirt does not remain
inside the steam-using equipment. (Stay clear of any pressurized blow-out from the
safety valve.)
2. Make sure that the shut-off valve and the bypass valve located upstream and
downstream of the
PN-COSR-16
are completely closed.
3. Remove the spanner cap and turn the adjustment screw counterclockwise to
reduce tension on the coil spring.
NOTE: Do not pull up the adjustment screw forcibly once the adjustment screw has
reached the point at which it stops. The internal stopper (C-ring) may break.
4. Slowly, fully open the shut-off valve at the inlet of the
PN-COSR-16
.
5. Slightly open the shut-off valve at the outlet of the
PN-COSR-16
.
6. Turn the adjustment screw clockwise until the desired outlet pressure is obtained.
Wait several minutes.
Tighten the adjustment screw
to increase pressure
Loosen the adjustment screw
to decrease pressure
Clockwise
Counterclockwise
7. Slowly, fully open the shut-off valve at the secondary side of the
PN-COSR-16
.
After setup, put the spanner cap back on.
8. When shutting down the system, always close the shut-off valve at the outlet first
and then the inlet.
Adjustment
Screw
