美国福斯 FlowTop 系列控制阀使用手册.pdf
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Valtek No. 185063 60-1
ing instruction, product documentation or on the
product itself) is essential, in order to avoid faults,
which in themselves might directly or indirectly cause
severe personal injury or property damage.
GENERAL INFORMATION
The following instructions are designed to assist in
unpacking, installing and performing maintenance as
required on FlowTop general service control valves.
Product users and maintenance personnel should thor-
oughly review this bulletin prior to installing, calibrating,
operating, troubleshooting or performing any mainte-
nance on the valve or actuator. Separate instructions
cover additional features such as positioners, solenoid
valves, limit switches, etc.
To avoid possible injury to personnel or dam-
age to valve parts, WARNING and CAUTION
notes must be strictly followed. Modifying this
product, substituting non-factory parts or us-
ing maintenance procedures other than out-
lined could drastically affect performance and
be hazardous to personnel and equipment and
may void existing warranties.
CAUTION: The FlowTop is a general service, light-
duty valve and is not intended for severe ser-
vice applications such as cavitation, flashing or
extreme noise levels. Refer to the FlowTop Con-
trol Valves technical bulletin for application
guidelines and other limitations.
WARNING: Standard industry safety practices
must be followed when working on this or any
other process-control product. Specifically, per-
sonal protection and lifting devices must be used
as warranted.
NOTE: Selecting the proper fastener material is the
responsibility of the user. Typically, the supplier does
not know the valve service conditions or environment.
The user therefore must consider the material’s
resistance to stress corrosion cracking in addition
to general corrosion. As with any mechanical
equipment, periodic inspection and maintenance
is required.
TERMS CONCERNING SAFETY
The safety terms DANGER, WARNING, CAUTION and
NOTE are used in these instructions to highlight par-
ticular dangers and/or to provide additional information
on aspects that may not be readily apparent.
DANGER: indicates that death, severe personal
injury and/or substantial property damage will
occur if proper precautions are not taken.
WARNING: indicates that death, severe personal
injury and/or substantial property damage can
occur if proper precautions are not taken.
CAUTION: indicates that minor personal injury
and/or property damage can occur if proper pre-
cautions are not taken.
NOTE:
indicates and provides additional technical
information, which may not be very obvious even to
qualified personnel. Compliance with other, not par-
ticularly emphasized notes, with regard to transport,
assembly, operation and maintenance and with re-
gard to technical documentation (e.g., in the operat-
Table of Contents
General Information ............................................. 1
Unpacking ............................................................ 2
Valve Installation.................................................. 2
Preventive Valve Maintenance ............................ 2
Overhauling Procedure ....................................... 3
Actuator Removal ............................................ 3
Mounting Actuator ........................................... 3
Replacing Plug ................................................ 4
Replacing Seat Ring........................................ 5
Packing Replacement...................................... 5
Reversing Single Actuator Action .................. 12
Actuator Service ................................................ 12
Diaphragm Replacement............................... 12
Stem Seal Assembly Replacement ............... 12
Actuator Mounting ............................................. 12
Air Supply .......................................................... 15
Troubleshooting, Actuator/Valve ........................ 15
FlowTop General Service
Control Valves
IM049 FlowTop IOM.p65 2/10/03, 12:34 PM1
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