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INTRODUCTION / DESCRIPTION
AVK Valves Swing Check Valves are primarily designed and manufactured for the prevention of
reversal and are suitable for
potable water or sewage applications. The operation of the valve is fully automatic allowing liquid to
in one direction only.
The function of the external lever and weight, where
is to provide additional weight loading to the valve disk, thus giving mechanical
assistance towards closure. The position of the weight is adjustable and allows the closure rate to be varied to suit the actual working
conditions.
Swing check valve options covered by this manual
Free shaft with cover
Lever and weight
Lever, weight and guard
HEALTH AND SAFETY AT WORK
Please ensure that all relevant Health and Safety issues and regulations are strictly adhered to, prior to and during any
installation or maintenance work carried out on these valves.
It is essential that wherever work is being undertaken on a valve that may involve the release of any internal pressure, the valve
is fully depressurised prior to any work being carried out, and the line drained.
It is also essential that the user handling the valve is aware of the weight of the components or assemblies to be handled and
manipulated during installation and maintenance. It is the end users responsibility to ensure that safe working practices are
followed at all times.
Whenever AVK Valves products are installed, operated, or maintained, the inherent dangers of pressurised liquids and gasses, which can
be severe, must be addressed.
Therefore, it is essential that staff undertaking these operations are adequately trained and it is the responsibility of the end user to ensure
that only trained and competent staff undertake these duties.
This manual has been designed to assist, but it can never fully replace quality training in the workplace. However AVK Valves technical staff
are always available to answer any questions relating to
problems that may not be covered by this manual.
AVK Valves products are designed and manufactured to be
for purpose, and to a high and reliable standard. This provides a safe product
with minimum risk to health when used correctly for the purpose for which it was designed.
However, this assumes that the equipment is used and maintained in accordance with this manual, and the user is advised to study this
manual, and to make it available to all staff that may need to refer to it.
AVK Valves cannot be held responsible for any incidents arising from incorrect installation, operation or maintenance. The responsibility for
this must rest wholly with the end user.
Note:
These valves are
NOT
designed for “end of line”’ services.
SPARE PARTS
The use of inferior materials or parts in a valve can have serious consequences. Therefore it is absolutely essential that in order to guarantee
the highest level of safety and performance, only genuine AVK Valves spare parts are be used.
AVK Valves cannot accept any responsibility whatsoever for the
and subsequent failure of any non-AVK Valves or non-approved parts.
DESIGN CONSTRAINTS
Please consider the following points when selecting your valve:
Consideration should be given at the design stage where valves will be located to give access for operation, adjustment, maintenance
and repair.
If a valve is installed less than 6 diameters downstream of an elbow or tee etc., it will experience very high-localised
velocities that are far in excess of the average velocity. This high velocity will result in excessive turbulence within the valve
and variations in performance may be experienced, therefore installation in this area should be avoided.
Valves must be provided with adequate support. Adjoining pipework must be supported to avoid the imposition of pipeline
strains on the body which may impair its performance
Heavy Valves may need independent support or anchorage
With proximity switch
