13 Disassembly and Reassembly
The MaxFlo 4 control valve is allowed to be
disassembled and reassembled only by qual
ified staff personnel who are familiar with
disassembling, reassembling, installation
and commissioning of this product, and pos
sess the relevant qualifications in their field
of activity.
When performing repairs, personnel are to follow these
instructions using only
original
equipment manufacturer
(OEM) spare parts and recommended special tools to ensure
the reliability of the MaxFlo 4 control valve.
Only Flowserve trained and authorized personnel are allowed
to repair (disassemble and reassemble) the MaxFlo 4 in
hazard areas.
Valves are provided for oil and grease-less service or oxygen
service may only disassembled and reassembled in clean
rooms (ISO 14644- ISO 8, US FED STD 209 E - M 6.5, or
equivalent).
WARNING
Control valves are pressure vessels.
Improper opening of the valve or actuator can result in bodily injury.
Prior to disassemble and reassemble, we require, that you check the following conditions to reduce the risk of malfunction
and safetyrelated incidents.
No.
Important information
Possible malfunction or safety related incident
1 Disregarding these instructions may bring serious or
harmful consequences.
Failure to comply with these user instructions will render
the manufacturer‘s guarantee and liability null and void.
Unless otherwise agreed, the manufacturer‘s general
terms and conditions of sale shall apply.
2
Always observe system safety instructions
when preparing for and performing the repair
procedure.
Potential hazards and their sources are under the operator‘s
influence. The operator must observe national and interna
tional environmental regulations for control valve removal
from the pipe and cleaning. Permissible exposure limits
must be maintained, appropriate personal protective equip
ment must be used and service personnel must be properly
instructed in performing the repair procedure.
3
Make sure the pipeline is depressurized an in
ambient state, also a suitable rigging (e.g.
Endless Sling) and securing devices (e.g. Vee Trough
with Stands / Vise) are readily available.
Remove the MaxFlo 4 from the pipeline in a depressur
ized and ambient state. Failure to do so can cause serious
personal injury.
The control valve is not equipped with integral stands,
therefore guard against the valve from tipping over. Bodily
injuries can be the result. Use appropriate clamps, block
ing or other stabilizing support. Attachment to overhead
crane can ensure stability.
4 Confirm that you have the required spare parts at the site.
Not having the full complement of parts, accessories and
tools can slow or stop repair work.
5
Confirm that you have the required tools avail
able to manage the disassembly and reassembly
Improper tools and / or improper use of tools can result
in personal injury or damage to the parts.
6 Review the serial plate information to identify the valve.
The serial number and the part numbers needed are re-
quired when ordering spare parts.
A serial plate used for product identification is attached
on every control valve (See Section 3: Product Identifica-
tion).
7 Do not damage any valve surfaces during repair.
Damaging the stem surface and / or packing area may
lead to premature leakages in the packing area.
8
Check all parts for damage such as scoring, deformities,
corrosion or overexpansion.
If in doubt, replace faulty parts.
Never reuse gaskets.
Table 7: Basic safety messages for repairing the control valve
MaxFlo 4 Control Valve FCD VLENIM0064-02-AQ – 09/16
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