172-65174MA-11 (COSR Pressure Reducing Valve) 16 Feb 2022
5
Correct Usage of the COSR Pressure Reducing Valve
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 COSR should be operated only within its specifications.
2. Installing an ON/OFF Valve (Solenoid Valve or Motorized Valve)
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 COSR. If a solenoid
valve is installed at the outlet of the COSR, 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 COSR 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 COSR.
3. Installing a Control Valve
A control valve installed between the COSR and the steam-using equipment
(downstream of the COSR) for controling equipment temperature may raise the
pressure between the COSR 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
COSR between the COSR and a control valve, an eventual pressure rise could
activate the safety valve.
Motorized Valve
COSR
Motorized Valve
COSR
Inlet Side
Solenoid Valve
COSR
Solenoid Valve
COSR
Outlet Side
COSR
Safety Valve
Control
Valve
Steam-using
Equipment
COSR
Safety Valve
Control
Valve
Steam-using
Equipment
COSR
Control
Valve
Safety Valve
Steam-using
Equipment
COSR
Control
Valve
Safety Valve
Steam-using
Equipment
