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1728 Orbit Way - Minden, Nevada 89423 P: 775-782-1700 F: 775-782-1701 [email protected] www.maxtonvalve.com
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The normal mechanical life of a Maxton valve is in excess of two million cycles. Valve operating life
can be affected by many variables, i.e. the operating temperature, the usage frequency, the
pressure ratio, and the presence of contaminants in the oil, their size, type and amount, etc. With the
presence of at least some adverse conditions in most installations, serious consideration should be
given to overhaul or replacement of a control valve on a five year cycle.
Rebuild of a control valve requires proper tools, detailed knowledge of critical areas in the valve, and
full testing of the completed assembly. Machining and component replacement may be necessary to
meet current design specifications. Few facilities have the knowledge and capability. For this reason,
Maxton no longer offers a valve service kit. Valve seal kits, seat kits, and solenoid kits are available,
but are neither designed nor intended for field rebuild of a valve unit.
A more cost effective and lower liability option to repairing control valves in the field is the Maxton
Valve Exchange Program. The exchange program provides you with a fully reconditioned, tested
replacement valve and includes a 2 year limited warranty, the same as our new valves.
Seat kits, seal kits, and solenoid kits are intended for use by professionals trained in the
manufacture, installation and maintenance of hydraulic elevator systems. Before disassembly or
replacement of a control valve, the main line power switch should be disconnected and locked out
and the car landed on the buffers (zero system pressure).
Manual lowering is used to lower a car for service, and to depressurize the oil system. This control
should be fully closed after use. If a car is stuck in the hoist way, manual lowering must be shut to
ensure the car remains supported by a column of oil.
There are neither parts nor kits available for the UC3/3A/3AM or Minimax control valves. These
valve models are no longer manufactured nor supported in the form of kits, parts, and repairs. For
replacement of a UC3 or MiniMax valve, contact our sales department with the job specifications to
determine the correct valve for replacement. Job specifications needed would include car speed,
jack piston diameter, capacity, no-load system pressure or empty car weight, the coil voltage and the
pump flange type.
It is recommended that solenoid seats and ball cage assemblies be replaced every 2,000,000
cycles. For a valve that was manufactured or last repaired before May 1995, the solenoid seat and
solenoid tube assembly must be changed together (use the appropriate solenoid kit).
SEAL KIT AND SAFE USE RECOMMENDATIONS
Содержание EMV10
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