Climax VM8000 GLOBE/CONTROL VALVE REPAIR - Manual (Page 8)

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V M 8 0 0 0 V a l v e R e p a i r M a c h i n e
page 8
Sometimes it's economical to replace
smaller valves, but it's usually more cost-
effective to repair the larger sizes.
Maintaining an inventory of replacement
valves to keep your system operating
would be prohibitive. Using portable
machine tools to repair valves in-line,
you save all the expense of replacement
valve inventory, weld reinspection, recer-
tification, and the downtime necessary
to complete the job.
With the Model VM8000 Valve Repair
machine, the repair operation consists of
removing the valve bonnet and stem
assembly, applying a weld build-up as
necessary in the corroded valve seat and
seal areas and remachining to the
manufacturer's original specifications.
The original in-line welds are not dis-
turbed and need no recertification.
Capabilities
The VM8000 is designed for on-site
remachining of seats and seal areas of
Fisher and Dresser Masoneilan (or any
other, similar type) control valves. The
machine mounts directly on the valve
and bores throat areas from 2.5 - 10
inches (63.5 - 254 mm) in diameter. Also
reface seats up to 0.75 inches (19.05
mm) wide without tool bit adjustment.
The machine can reach 16 inches
(406.4mm) from the top to the valve
body and has a boring stroke of 10
inches (254mm).
The machine cuts nearly any kind of
finish from fine to 40-pitch scroll for
gasket seals.
Features
Components of the VM8000 include a
main body, rotational drive unit, turning
bar, mounting fixtures and tool holder
set. Machining torque is delivered
through the rotational drive unit, which
may be either hydraulically or pneumati-
cally driven. The axial feed system is
manually controlled. Calibrated in 0.001
inch (0.0254 mm) increments, the feed
dial can be zeroed to cut precise depths
specified by the manufacturer. Boring
diameter is set with the manual hand
wheel on top of the bar. Make multiple
boring passes without removing the
machine for tool adjustments.
Pin locators in the mounting plates allow
accurate repositioning of the machine's
main body during multiple setups.
Because the turning bar rotates in close-
tolerance needle bearings, the machine
is capable of high precision machining.
During boring operations, total indicated
runout (TIR) will not exceed 0.002 inches
(0.0508 mm) over the entire stroke.
With the long turning bar, deep valve
machining is possible. The rack-actuated
tool head radial feed is automatic at 0.003
inches (0.076 mm) per revolution, or
manual at 0.025 inches (0.635 mm) per
revolution.
Precision machining is achieved with the
calibrated radial feed dial located on top
of the turning bar.
Setup and Operation
Remove the valve's bonnet and stem
and mount the Model VM8000 base
plate. Attach, center and level the
intermediate plate and main body
assembly. Cut the necessary weld preps,
making sure old weldments and all
corrosion is removed. Remove the
VM6000 and apply weld buildup as
needed. Using the pin locator system,
the machine is reattached to the
intermediate plate in perfect alignment
for finish machining all seat and seal
areas. The tool bit remains visible during
machining operations so the operator
has excellent control of all precision
boring and facing operations.
Repair corroded seal areas on-site with
the valve in-line.
Base
plate
Locator
pin
Valve