Maxton EMV10, Руководство пользователя

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1728 Orbit Way - Minden, Nevada 89423 P: 775-782-1700 F: 775-782-1701 info@maxtonvalve.com www.maxtonvalve.com
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CAR AT REST – SOLENOID COILS DE-ENERGIZED
The car at rest is held by a hydraulic fluid system locked in place by a check valve, solenoid pilot valves and a
manual-lowering valve.
DOWN DIRECTION
When a down call is registered, the down leveling solenoid (DL) and the down valve solenoid (D) are
simultaneously energized, allowing fluid from the control side of the down piston and fluid from the down
control adjustments, down stop (DS) and down transition (DT), to flow through the down acceleration
adjustment (DA) and back to the reservoir. This reduces the pressure on the control side of the down piston.
The pressure acting on the area of the down piston exposed to the jack pressure causes the down piston to
open the down valve. The down valve will remain in the open position as long as the flow of control fluid
passing through the down acceleration adjustment (DA) exceeds the flow through the down transition (DT)
and the down stop (DS) adjustments. The maximum down speed is controlled by a mechanical stop limiting
the down piston travel (Down Adjustment (D)).
Upon reaching a predetermined distance above the floor to which the car is traveling (6 inches for each 25
feet per minute of car speed) the down solenoid (D) is de-energized. The fluid input to the control side of the
down piston from the jack continues, as the control side of the piston is larger in area than the area exposed
to jack pressure. This causes the down piston to start closing. A control rod follows the movement of the
piston, uncovering control porting and allowing fluid to flow through the down level adjustment (DL), which
when equal in quantity to the flow through the down transition adjustment (DT), stops the motion of the piston,
placing the down valve in the leveling position. The rate of movement of the down piston from the open
position to the leveling position is controlled by the down transition adjustment (DT). Upon reaching a point
slightly before floor level, (usually 3/8 of an inch to 1/4 of an inch), the down leveling solenoid (DL) is
de-energized, causing the fluid coming through the down stop (DS) adjusters to be diverted to the control side
of the down piston, moving the down piston to the fully closed position of the down valve.
The final closing rate of the down valve is controlled by the down stop adjustment (DS). Opening the down
stop adjustment (DS) will cause the car to stop more firmly, as control fluid is sent to the control side of the
down piston at a more rapid rate.
DOWN DIRECTION UC4MR
Constant down speed is controlled by the down speed regulator adjustment (DSR) which regulates the
movement of the down piston and down valve in the event of increased jack pressure. This continuous
regulation causes a constant rate of flow in the down direction from the jack through the down valve and back
to the reservoir regardless of varying loads on the elevator. The UC4MR valve does not require the down
stop adjustment (DS) as does the UC4 and UC4M valves. With the above exception, the UC4MR valve
operates in general as the UC4 and UC4M valves.
OPERATING SEQUENCE UC4, UC4M, UC4MR
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