172-65604MA-00 (
PN-COSR
Pneumatic Control Valve) 10 Sep 2014
5
Correct Usage of the
PN-COSR-16
Install properly and DO NOT use this product outside the recommended
operating pressure, temperature and other specification ranges.
Improper use may result in such hazards as damage to the product or
malfunctions which may lead to serious accidents. Local regulations
may restrict the use of this product to below the conditions quoted.
CAUTION
1. The
PN-COSR-16
should be operated only within its specifications.
2. Installing an ON/OFF Valve (Solenoid Valve or Motorized Valve)
PN-COSR
Motorized
Valve
Inlet side
PN-COSR
Motorized
Valve
Inlet side
PN-COSR
Solenoid
Valve
Outlet side
PN-COSR
Solenoid
Valve
Outlet side
If an on-off valve, such as a motorized valve, is required to stop supply of steam
to the steam-using equipment, install it at the inlet side of the
PN-COSR-16
. If a
solenoid valve is installed at the outlet of the
PN-COSR-16
, its opening and
closing will cause heavy chattering and may lead to damage of the piston and
main valve. (When the on-off valve opens, the secondary pressure of the
PN-
COSR-16
changes from zero to the set pressure. Passing through an area of
the reducing ratio of less than 10:1, where adjustment is impossible, chattering
occurs momentarily.) To save energy, it is recommended to install the on-off
valve as near to the boiler as possible.
NOTE: To prevent water hammer, it is recommended that a slow-acting motorized
on-off valve be used. In particular, if a fast-acting on-off solenoid valve is
used for frequent temperature control, the potential water hammer effect
can damage the steam-using equipment and the
PN-COSR-16
.
3. Installing a Control Valve
Control
Valve
PN-COSR
Safety
Valve
Equipment
PN-COSR
Safety
Valve
Control
Valve
Equipment
A control valve installed between the
PN-COSR-16
and the steam-using
equipment (downstream of the
PN-COSR-16
) for controlling equipment
temperature may raise the pressure between the
PN-COSR-16
and the control
valve when the control valve is closed, depending on the spatial relationship. A
safety valve should be installed downstream of the control valve.
NOTE: When installing a safety valve to protect the steam-using equipment, be sure
to install it on the steam-using equipment or directly before the inlet of the
steam-using equipment. If the safety valve is installed on the outlet side of
the
PN-COSR-16
between the
PN-COSR-16
and a control valve, an
eventual pressure rise could activate the safety valve.
