Flowserve Trunnball DL Ball Valves IOM - Manual (Page 4)

4
2 Lifting
All lifting must be carried out on the valve itself and not on the
actuator. The mounting connection between the valve and the
actuator is designed principally for carrying the operating torque and
the deadweight of the actuator and is not designed to support the
weight of the valve. See Figure 1.
Figure 1 – Lifting of the valve
3 Receiving Inspection
All valves leaving our facility are inspected and tested in accordance
with the relevant requirements or in accordance with the special
provisions specified by the purchaser. Valves equipped with actua-
tors are subjected to functional testing and are adjusted in such a
manner that every unit is ready for direct installation in the pipework.
However, because damage may have occurred during transport, it is
advisable that receiving inspection be carried out.
We suggest the following inspection procedure:
• Check that the valve delivered is correct in terms of type, size,
equipment, etc.
• Examine the valve, actuator and valve positioner for possible
damage.
4 Installation
Before installing the valve, ensure the pipework is free from impurities,
that the pipe end connectors between which the valve is to be
installed are parallel and are correctly aligned, and that the distance
between the pipe ends correspond to the valve length, including
gaskets. The valve must not be used for drawing together or aligning
incorrectly run pipes as this will cause improper loads on the valve
and pipe which could lead to problems during operation. See Figure
2.
Figure 2 – Ensure that the pipe ends align and have the correct gap
NAF Trunnball DL valves can be installed in any orientation and for
either direction of flow.
However, we recommend that if installed in a horizontal run of
pipe, the valve should be mounted with the stem pointing vertically
upwards.
The pipes should be supported on each side of the valve in order to
relieve the valve of unnecessary loads and avoid vibrations.
Locate the valve so it will be easily accessible for inspection and
service, particularly if the valve is equipped with an actuator and a
valve positioner.
5 Commissioning
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 or impede its operation will be flushed away.
Incorrect installation Correct installation
NAF Trunnball DL Ball Valves NFENIM4168-00-A4 01/15