Know-how makes the difference
7
B-6140-UK-01-2014-REV. A
An
Company
Approvals
Installation guide
General remarks
1.1 The installation must take place under the supervision of an authorised person taking account of local safety
instructions and advice.
1.2 The handling of valves must be done by staff trained in all technical aspects of their operation.
1.3 Before installation the pipes must be depressurised and purged (empty of fluid) in order to avoid any danger
to the operator.
1.4 The pipe work must be correctly aligned so that no extra stress is exerted on the valve casing.
1.5 The valve is a fragile piece of equipment and must not be used to align or break the flanges of pipework.
1.6 In an ATEX zone, check that the pipework is earthed. Do not use isolating pipes (PVC etc.)
1.7 Check the compatibility of the connection flanges against the operating pressure: the PN number of the
flanges must be greater or equal to the operating pressure.
Installation position
2.1 If the non-return valve has an inspection plate, this should be easily accessible.
Fitting to the pipework
3.1 Make sure that the surfaces of the flanges are clean and undamaged.
3.2 Make sure that the valve can be easily fitted between the flanges without damaging the surface of the flanges
or joint.
3.3 Prise apart the flanges with a suitable tool (without damaging the flanges) if the fit is too tight.
3.4 Make sure that nothing interferes with the movement of the closing system while the valve is operating.
3.5
On a new installation, never weld the flanges with the valve in place - risk of burning the internal
components.
3.6 The flange bolts must be tightened in accordance with current regulations.
3.7 In an ATEX zone, connect the earth strap to one of the pipes upstream or downstream. Check the continuity
between the valve casing and the pipe connected to the braided wire using an ohmmeter (test according to
the standard EN 12266-2 annexe B, point B. 2.2.2. and B.2.3.1). Check in addition that the pipe work is
properly earthed and that the electrical connection between the two sets of pipe work (upstream/downstream)
has been made.
Installation conditions
4.1 It is recommended that the valve be positioned some distance from any change of direction in the pipe work or
from other apparatus in order not to place it in a turbulent zone which would increase its wear.
(Between 3 and 5 times the diameter in a straight line both upstream and downstream of the valve).
4.2 At the lifting of a rotodynamic pump, it is recommended that a valve which conforms to the standard NF CR
13932 is installed.
Commissioning
5.1 Before putting valve into operation, check that the working conditions are compatible with the details given on
the identification plate, this instruction notice and the other details (technical datasheet, price list catalogue,
advisory service).
5.2 Check several times that the valve works efficiently during testing.
5.3 On a new installation or after maintenance, the circuit must be rinsed with the valve completely open in order
to remove solid matter which may damage the internal parts of the valve.
5.4 The installation should be put under pressure progressively to avoid damaging internal parts.
5.5 Make sure that when flow stops the valve maintains pressure well and that there is no water-hammer which
might damage the valve or installation. If there is water-hammer, an anti-water hammer system must be
added to the installation.
5.6 During a prolonged stop, a change in the state of the fluid may result in damage when the installation is
brought back into service (solidification….). Establish an adequate procedure programme for cleaning the
system.
CE
