Operation instructions Butterfly Check Valve Series TRI-CHECK, with
counter weight and optional hydraulic damper
ZWICK Armaturen GmbH D-58256 Ennepetal
Instructions No.
Zw-Tri-Check-2016 / Rev.11
6
4
Installation
4.1. General
The requirements for the installation apply for valve units same as for the piping system into which
the valve is installed and as for the plant control system, to which the actuator is connected. This
instruction gives such advices only, which
shall be observed additionally
.
Danger
Check valves – especially wafer type valves – shall be transported and installed
disc
closed only.
Otherwise the disc could be damaged and the valve will no more be
tight.
Attention
When the valve is not yet installed: Prevent to get one’s hand between body and disc:
The Interlocking of the disc / the damper may only be removed and carefully be
operated when the check valve is installed in the pipe system.
If a butterfly valve is used in end-of-line-service, take special care to assemble a blind
flange or a cover behind the valve.
Attention
The check valve is adjusted for the tight closed position by the manufacturer:
In the closed position the limit stop of the unit valve / actuator must be in the seat of
the check valve. The movement of the counter weight and the disc must by no means
be limited. The position of the counter weight on the lever is adjusted by the
manufacturer.
This adjustment of the counter weight must not be changed.
Mortal
Danger
Make sure that the valve is installed in the orientation approved by the manufacturer.
Usually the valve is installed in a horizontal pipe. The shaft of the valve usually is in a
horizontal orientation. The counter weight has to be positioned in a way that it closes
the disc in a clockwise direction.
The mounting orientation MUST be approved by the manufacturer.
Disregarding these rules can lead to damages on the valve and/or make the pipe
system burst and cause danger to health and life of the user!
Attention
Check valves with damper:
Make sure that the damper complements the design of the installation. The damper
has a direct influence on the opening and closing time of the valve. An improper
adjustment can cause unregulated and/or inadmissible operating states of the
installation.
Disregarding these rules can lead to damages on the valve and/or make the pipe
system burst and cause danger to health and life of the user!
4.2
Installation
⇒
Bring the valve in its protective packaging to the place of installation and do not unpack it
earlier.
⇒
Check and be sure, that the valve and the actuator are free from damage. Valves or actuators
with visible damage must not be installed.
⇒
Check and be sure, that the valve pressure class and the connecting type and dimensions and
the actuator data correspond to the plant data. See markings in the valve’s label.
Mortal
Danger
No valve shall be installed, that’s certified pressure/temperature range (= "rating") is not
sufficient for the operating conditions: This range is defined in the catalogue <butterfly
valves TRI-CHECK>. See section 9 < information >.
If other materials are used or at service conditions not included in the above mentioned
diagrams, the manufacturer shall be asked for release.
Ignoring these requirements could mean danger for the life or health of the user
and/or cause damage in the piping system.
At any doubt, contact the manufacturer.