Flowserve Valtek Torex TX IOM - Manual (Page 3)

Torex TX VLEEIM4143-02 09.10
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4. Installation
Before installing the valve, ensure that the pipework is
free from impurities, that the pipe ends between which
the valve is to be installed are parallel and are correctly
aligned, and that the distance between the pipe ends cor-
responds to the valve length, including gaskets.
The valve should not be used for contraction or aligning
incorrectly pipe lines (see Fig. 2).
Wrong installation Correct installation
Fig 2: Ensure that the pipe ends align and have the
correct distance
Torex TX valves can be installed in any position,
regardless of the direction of flow. However, we
recommend that, if installed in a horizontal run of pipe,
the valve should be mounted with the stem horizontal,
in order to prevent the accumulation of dirt and other
impurities around the stem ends.
The butterfly valve body is marked with an arrow which
indicates that best tightness thereby that the differential
pressure gives an additional torque in the closing
direction while a differential pressure towards the plane
side gives an extra torque in the opening direction.
Locate the valve so that it will be easily accessible
for inspection and service, particularly if the valve is
equipped with an actuator and a valve positioner.
Ensure that the valve is installed so that the connected
pipe ends do not obstruct the free movement of the disc
when the valve is operated.
The pipes should be supported on each side of the
butterfly valve, in order to relieve the valve of loads and
avoid vibrations.
5. Flange gasket
Gaskets to the dimensions specified in SS 359, DIN 2690
or ANSI B 16.5, 1988, Table E1, Figure E2, Class 150 can
be used.
6. Starting up
Before starting up, flush the pipework - with all valves
in the open position - so that any impurities that may
damage the sealing surfaces of the valve and impede its
operation will be flushed away.