Flowserve Nordstrom Dynamic Balance Plug Valve and Double DB Plug Valve - Manual (Page 12)

Flow Control
Nordstrom Valves
12 Dynamic Balance ® Plug Valve and Double DB ® Double Isolation Plug Valve FCD NVENIM2005-01
5.4 When You Call or Write Us
In our effort to make a great valve even better, we have continually
made design changes over the years. Three pieces of information,
located on your Dynamic Balance Plug Valve, help us correctly
identify your valve. Please provide us with the following, which you
will find imprinted on the valve Nameplate:
1. Valve Size and Figure Number (including prefixes or suffixes)
2. Bill of Material Number
3. Valve Serial Number (Note: some valves don’t have this
number.)
An example of the valve Nameplate is shown below (the numbers
correspond with the points listed above).
Figure 1 – Illustration of typical nameplate
1
3
2
5.5 Product Identification
It is important to know the type of valve you are working on or
around, since it may influence the safety precautions that need to be
taken.
Both the valve design and our parent company have changed several
times:
• In 1989 BTR plc acquired the Flow Control Division of Rockwell
International and formed Nordstrom Valves, Inc.;
• In 1999 Nordstrom Valves, Inc., and Serck Audco Valve Company,
both Invensys companies, merged as Nordstrom Audco Inc.;
• In 2002 Flowserve Corporation acquired the Flow Control Division
of Invensys, and Nordstrom Audco Inc., was renamed Flowserve
Sulphur Springs Operations;
Therefore, nameplates on Dynamic Balance Plug Valves may show
any one of four company names:
• Rockwell International
• Nordstrom Valves, Inc.
• Nordstrom Audco Inc.
• Flowserve Nordstrom Valves
5.6 Economics of Valve Repair
The instructions listed in this manual are intended to serve as
a basic guide for maintaining, reconditioning, and repairing all
Dynamic Balance Plug Valves.
In determining whether a used valve justifies repair, compare the
probable cost of repair with the cost of purchasing a new valve for
replacement. Clearly, the cost of repair depends on the amount of
work involved and the cost of parts.
The reclamation of Dynamic Balance Plug Valves of all sizes and
figure numbers is usually worthwhile when the valve requires only
cleaning, inspection, and reassembly with new packing, diaphragms,
and gaskets.
In severe cases, the valve body may require reboring and fitting an
oversize plug. Repairs of this extent are economically justified for
a great many sizes and figure numbers of Dynamic Balance Plug
Valves. Only general indications can be given, as repair costs will
vary due to differences in labor and overhead rates.
Before any repair is started, it is suggested that the cost of non-
guaranteed repair valve performance be considered. Often, valves
repaired by a company other than the original equipment manufac-
turer can ultimately cost more in faulty performance and short life.
To maintain the high standards of performance expected of
Flowserve Nordstrom Valves, Flowserve offers valve remanufactur-
ing services that includes the following features and benefits:
1. Repair work is guaranteed under a three-year warranty.
2. New features are added to older design valves. (In some cases)
3. The valve is tested to new valve standards.
4. A like-new valve is provided at a fraction of a new valve cost.