Installing An On-Off Valve; Installing A Control Valve; Blowdown; Remove Protective Seals - TLV COS Série Manuel D'utilisation

4.2 Installing an ON-OFF Valve (solenoid valve or motorized valve)
If an on-off valve is required to stop supply of steam to the steam-using equipment, install it at
the inlet side of the COS/COSR (see section 4.1). If a solenoid valve is installed at the outlet of
the COS/COSR, it 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 COS/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, install the on-off valve as near to the boiler as possible.
To prevent water hammer, it is recommended that a slow-acting motorized on-off valve be
used. If a fast-acting solenoid valve is used, the potential water hammer effect can damage the
steam-using equipment and the COS/COSR.

4.3 Installing a Control Valve

A control valve (i.e. for temperature control)
installed between the COS/COSR and the
steam equipment (downstream of the
COS/COSR) may raise pressure between the
COS/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-
using equipment. Also, a safety valve should
be installed downstream of the control valve.
NOTE: When installing a safety valve to protect steam-using equipment, be sure to install it on
the equipment or directly before the inlet of the steam-using equipment. If the safety
valve is installed between the COS/COSR and a control valve, an eventual pressure rise
could activate the safety valve

4.4 Blowdown

Before installing the COS/COSR unit, be sure to blow down all piping thoroughly. If this is not
possible, perform a blowdown using the bypass valve. Blowdown is especially important for
newly installed piping or after the system has been shut down for a long period of time.

4.5 Remove Protective Seals

Before installation, be sure to remove all protective seals and caps covering the product inlet
and outlets. (Found at 3 locations for the COS, 2 locations for the COSR.)

4.6 Installation Angle

Make sure the COS/COSR is installed on horizontal piping, so
that the arrow mark on the body matches the direction of steam
flow and the adjustment screw section faces up. Allowable
inclination is 10 degrees in the fore-aft direction and 15 degrees in
the plane perpendicular to the steam flow line.

4.7 Spacer Installation

If spacing adjustment is necessary to accommodate installation,
install a spacer on the outlet flange. The spacer should consist of
a spacer, gaskets, bolts and nuts. Fit gaskets to both sides of the
spacer between the COS/COSR outlet and the pipe flange.
Fasten with bolts and nuts.
COS/COSR
̶ 9 ̶
Safety Control
Valve Valve
Equipment
10˚
10˚
15˚ 15˚
Correct Spacer
Location