Weld-on
Valve Jacketing
Flextrol's Weld-on Valve Jackets are produced in full coverage
or partial coverage designs. The weld-on design places the
heating media in direct contact with the valve body, thereby
ensuring excellent and reliable heat transfer to the valve
body. The valve bonnet may also be jacketed. Our standard
rating is 150 PSIG at 650°F. Other pressure and temperature
ratings are available. The jacket can be fabricated of carbon
steel, stainless steel, or other alloys. All finished jacketed
valves are pressure tested on both the heating side and
the process side before shipment. Normally, we provide 1/2"
female NPT ports on 1" through 2 1/2" valves,
3/4" ports on 3" through 6" valves, and 1"
ports on 8" and larger valves. Flanged ports are also
available.
CAD
images of a full metal jacketed valve:
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Full
Coverage with Oversized Flanges
This design allows heating media to contact both the valve body
and that portion of the flange within the bolt circle. Standards
for this design require that the flanges be oversized by one full
size over the valve size. The finished face-to-face dimension
will conform to ANSI standards for the oversized flange.
Full
Coverage with Standard Flanges
Standard flanged valves can be fully jacketed. This compact design
is accomplished by installing blind, tapped inserts in the flange
bolt holes, with the jacket welded to the periphery of the flange.
Flextrol's unique design will allow the heating media to come
into contact with the valve body and flanges.
Partial Coverage with Standard Flanges
When standard flanges are required and full coverage is not necessary,
partial coverage is appropriate. The reliability and excellent
heat transfer characteristics of the weld-on jacket are retained,
but flange heating is indirect. In the partial coverage design,
only the mid-section of the valve body is enclosed in the jacket,
thereby leaving clearance for flange bolt-up. Flextrol Partial
Jackets can be added to most valves such as ball, globe, plug,
gate, butterfly, check and sampling valves and also other process
equipment.
