FMC M12-HD, Руководство по эксплуатации и техническому обслуживанию

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F M C M 1 2 - H D O P E R A T I O N A N D M A I N T E N A N C E M A N U A L
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Note: FMC M12 valves are held in place using a self-locking taper. The tapered portion
of the valve seat and the tapered portion of the fluid cylinder must be clean and dry
prior to assembly to insure proper operation. Failure to properly clean parts before
reassembly could lead to wash out of fluid cylinder or dislodgment of valve assemblies
during operation.
•
To reassembly valves, first insure the fluid cylinder
and valve seats are clean, dry, and free from oil,
rust, or other debris. Use a hose, pressure washer,
or scrubbing cloth on the valve bores on the fluid
cylinder if necessary to insure proper cleanliness.
•
Suction valves must be installed first, followed by
discharge valves. Valve assemblies from FMC will
arrive properly assembled and torqued direct from
the factory. If it is necessary to disassembly new
valves (or if you are not sure if they had been
previously disassembled) insure that the cage is
torqued to the seat to 25 ft-lbs before installation.
Use the hex provided on the valve cage tool (11) in
the puller kit to torque the cage.
•
Lower the suction valve assembly into position on
the port taper of the fluid cylinder, lift slightly, then
allow to drop straight into the port. If the seat
drops straight it will seize in the taper and cannot
be removed by hand.
•
Drive the valve assembly into the port taper using
several sharp blows from a mallet. The valve cage
can be bent or damaged if impact forces are
applied unequally or to the center of the valve
cage. To avoid bending the top of the valve cage, it
is advised to seat the valve assembly by driving on
the top of the valve stem as shown. If this is not
practical, drive on the top of the cage using a
device that spreads the force of the impact across
the full diameter of the valve cage (such as a wood
or bronze bar of the proper diameter). Make sure
valves are seated properly or they may dislodge
during operation and cause damage to the pump.
•
Install the discharge valve assemblies using the
same procedures used for the suction valves.
•
Install a new o-ring (6) in the valve cover. Use a
dab of grease or oil in the groove to help hold the
o-ring during assembly.
•
Replace the valve cover (5) in the fluid cylinder.
Replace the studs (3), valve cover clamp (4),
washers (2), and hex nuts (1).
•
Torque the valve cover hex nuts (1) to 200 ft-lbs.