44
Series Ball Valve (US)
A quantum advance in ball valve durability, cycle life,
leak tightness and automation. Flowserve Worcester Controls
Series 44 three-piece ball valves, for many years the most
respected ball valve design in the industry, are now better
than ever. A major research, design, and testing program brings
you a new valve, designed to ANSI B16.34 specifications with
advanced seal technology and body mount bracket design.
This means a very strong, tough valve that can handle pressure
and unforseen piping strains with a stem seal that extends
operational cycle life and a standardized overall design that
keeps parts inventory to a minimum. Then there’s documentation.
B16.34 means complete traceability of assembly and testing
procedures, heat codes, and foundry identification. Full CMTRs
(Certified Material Test Reports) on pressure vessel parts
are optionally available. Valve identification is provided
on a stainless steel nameplate meeting MSS SP-25.
High Performance
An improved stem seal design, consisting of live-loaded
PEEK and Polyfill® thrust bearings and seals, significantly
increases valve cycle life over conventional ball valves and
extends time between adjustments. In manual valves, the two
spring washers are compressed by two retaining nuts. A single
Nylon-insert locking nut and four spring washers are used
on automated valves. Body-Mounted Actuator Design Actuators
for Worcester’s Series 44 three-piece valves are mounted
on rigid, precisely machined, box-style brackets bolted to
the valve center section. This brings a number of advantages
to the valve user:
- Actuator loads are on the valve body;
- Actuators and brackets can be removed for service without
affecting valve or piping integrity;
- Easy access for stem seal adjustment;
- Inventory simplification. Mounting brackets are common
to threepiece and equivalent flanged valves.
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