Walworth Valves - How to Order
How
to Specify and Order the Correct Valves This
catalog has been published to assist you in
choosing the correct valve for a vast number
of piping conditions. Walworth product lines
make available to you a very broad choice of
valves. These valves are described in this catalog.
Other valves and piping accessories are regularly
manufactured by the company and can be furnished
to meet your requirements on request. Care should
be taken to select the most suitable valves
for your service(s). Exact specification of
each valve should be made to avoid possible
ambiguity. When requesting quotations and/or
ordering the product a fully adequate description
should be made.
Selecting
the Valve
Size
Nominal
size of the pipeline into which the valve will
be placed must be determined. Comprehensive
data on flow characteristics and pipe properties
are available to assist you in determination
of proper valve size.
Valve
Material
The
following facts should be considered in determining
the correct valve material:
The
medium or media which will be controlled.
The
temperature range of the line medium (media).
The
pressure range to which the valve will be subjected.
Possible
atmospheric conditions which may affect the
valve.
Possible
extraordinary stresses to which the valve will
be subjected.
Safety
standards and/or piping codes which must
be met. In the technical data section and throughout
the catalog, data is given to assist you in
making this determination. In material descriptions
for specific valves the standard materials are
listed. However, other materials are available
and are shown on the pages referred to in the
description of the valve. Careful attention
should also be paid to the various "trim"
options which are available to accommodate the
service conditions.
Type
of Valve
What
is the control function of the valve? Each valve
configuration has been developed to perform
certain control functions. Do not expect one
type of valve to perform all the valving
jobs in a system. A few minutes spent in reading
some simple valve facts in this catalog will
prove helpful. Please pay careful attention
that the pressure-temperature ratings stated
in the catalog are in keeping with the requirements
of the service.
Valve
end connections Considerations as to pipeline
integrity, future maintenance, corrosion factors,
field assembly, weight and safety should be
given in determining the method of connecting
the valve in the pipeline.
Method
of Operation
The
means by which the valve is operated as supplied
are shown for the valves in the catalog. Many
optional operating devices are regularly supplied
by Walworth Company.
Ordering
the Valve
Please
state the following information when ordering
a valve in order to avoid unnecessary delays
and possible failure of Walworth to supply you
with the valve you have requested.
1.
Valve size.
2.
Pressure-vessel metal and trim material where
applicable.
3.
Type of valve - gate, globe, globe non-return,
y-globe etc.
4.
End connection including wall thickness of connecting
pipe if weld end and any special flange characteristics
(such as ring joints) if flanged.
5.
Any changes in materials from standard - packing,
bolting etc.
6.
Any accessories - acid shield, locking devices,
chain operation etc.
7.
Manual or power actuators with details of requirements.
8.
For convenience in ordering, specify, wherever
possible, by Walworth Valve figure number.
Do
not hesitate to contact your nearest Walworth
Sales Office for additional assistance in valve
selection. Walworth sales personnel are technically
competent and are backed by a company with over
135 years of experience of supplying valves
for industry . . . everywhere.
