6
Correct Usage of the
MC-COSR
Multi-control 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 MC-COSR should be operated only within its specifications.
172-65185A-08 (MC-COSR Multi-control Valve) 20 Nov 2014
2. Installing an ON / OFF Valve (Solenoid Valve or Motorized Valve)
M C -C O SR
M C -C O SR
電動弁
入口側
電磁弁
出口側
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 MC-COSR. If a solenoid valve is
installed at the outlet of the reducing valve, 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 multi-control valve 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, 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 equipment and the multi-control valve.
3. Installing a Control Valve
安全弁
蒸気使用装置
制御弁
M C -C O SR
安全弁
蒸気使用装置
制御弁
M C -C O S R
Motorized
Valve
Solenoid
Valve
A control valve (i.e. for temperature control) installed between the MC-COSR and the
steam equipment (downstream of the MC-COSR) may raise the pressure between the MC-
COSR and the control valve when the control valve is closed, depending on their spatial
relationship. Therefore, the control valve should be installed close to the steam equipment.
Also, a safety valve should be installed downstream of the control valve.
Note: When installing a safety valve to protect the steam equipment, be sure to install it
on the steam equipment or directly before the inlet of the steam equipment. If the
safety valve is installed between the MC-COSR and a control valve, an eventual
pressure rise could activate the safety valve.
Inlet Side
Outlet Side
Safety
V ve
al
Control
Valve
Control
Valve
Safety
Valve
Equipment
Equipment
