Flowserve Serck Audco Twin Isolation Plug Valve - Manual (Page 8)

5 INSTALLATION INSTRUCTIONS
a) Serck Audco TIPV plug valves are bi-directional, and can be installed vertical (stem operating end
at the top), horizontal or any angle in between. If the valve is installed in any other position, the
operating torque will increase considerably, possibly resulting in seizure.The actuator may need
supporting if it is not vertically above the valve.Ensure access to the sealant fitting, stem packing
compound injector, plug loading screw, and any drain plugs. Ensure that the relief valve in the gear
unit position indicator cannot discharge where it could cause personal injury.
b) Installation of flanged valves should follow prevailing site standards. Where such standards do not
exist the following should be used as a guideline.
c) Flanged joints require compressive loading onto the gasket material as the normal line pressure
forces tend to separate the joint. There should be no misalignment between the valve and
mating faces.
d) Pipework should have the correct gap to allow for the valve face to face length plus assembled gasket
material width.
e) Ensure the pipeline and flange faces are clean and free of any debris which may be detrimental to
flange sealing.
f) Bolting should be of the correct size, length, and material for the duty.
g) Locate the valve between the pipe ends and slide in the gaskets. It may be necessary to lever the
mating flanges gently apart to allow for easy fitting of the gasket. Care should be taken to prevent
damage to the sealing surfaces. Correct lifting equipment must be used when handling valves for
operator safety - see Section 3, paragraph k).
h) Assemble all bolts and loosely tighten. Diametrically and evenly tighten the bolts to the correct torque
required for the specific gasket material, per the gasket manufacturers recommendations.
i) Screwed Ends - Pipe wrenches can be used to grip the valve body adjacent to the connection, while
tightening it. Use of a thread sealant is recommended to ensure a pressure tight joint.
j) Weld Ends - All welding should be performed by qualified welders using approved procedures. If
good industry accepted practices are used (such as ASME IX), the heat from the welding will not
affect the stem packing, or cause the sealant to decompose. Any post weld heat treatment (PWHT)
must be restricted to the heat affected zone.
k) Hub Ends - To be installed according to the hub end designers installation instructions.
l) It is recommended that the valves are left in the open position during fitting.
5.1 COMMISSIONING TESTS
All valves are factory tested in accordance with valve industry standards API 6D, API 6A, API 598, or
BS EN 12266-1, unless specified otherwise. If there is an operational need to test the valve at higher
pressure, temperature or duration, consult Serck Audco Valves Technical Sales.
If water is used for testing, it is beneficial to dry out the valve internals by flushing the system with dry
nitrogen or air, after the testing is completed.
Serck Audco TIPV Twin Isolation Plug Valve FCD - SRENIM0005-04 (A4) – 02/14
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