Flowserve 50165 Nordstrom Figure - Manual (Page 18)

Nordstrom Figure 50165 and 50169 Dynamic Balance Iron Plug Valve FCD NVENIM2006-00 – 09/05
1
5
Dynamic Balance Iron
Plug Valve Maintenance
Notice
This manual is intended as a maintenance guide for Flowserve Nordstrom Dynamic Balance Iron Valves.
Before working on any Nordstrom valve or related product, the reader should review and fully comply
with this manual and its warnings as well as the reader’s company safety procedures.
If anything in this manual is unclear, contact the Flowserve Nordstrom Valves Customer Service Depart-
ment for assistance.
Flowserve and its employees are in no way responsible for damage to property or for personal injury or
death that may result through the use or misuse of any Flowserve Nordstrom Valves product, publica-
tion, audio or visual aid.
Economics of Valve Repair
The instructions listed in this maintenance manual are intended to serve as a basic guide for recondi-
tioning or repairing all Dynamic Balance Plug Iron Valves.
Whether a used valve justifies repair is an individual matter and should be decided by comparing the
probable cost of repair with the cost of purchasing a new valve for replacement. Naturally, the cost of
repair will depend upon the amount of work involved and the cost of parts, if any are required.
The reclamation of Dynamic Balance iron valves of all sizes and figure numbers is usually worthwhile
when the condition of the valve is such as to require only cleaning, inspection, and reassembly with new
packing, diaphragms, and gaskets.
In severe cases, the valve body may require boring and fitting an oversize plug. Repairs of this extent
are economically justified for a great many sizes and figure numbers of Dynamic Balance valves. Only
general indications can be given since repair costs will vary due to differences in labor and overhead
rates in various shops.
Before any repair is started, it is suggested that the cost of non-guaranteed repair valve performance
be considered. Many times valves repaired by other than the original equipment manufacturer can cost