Working Test; Rupture Valve Maintenance; Rupture Valve Effects On The Lift - OmarLift VP 114 Manual De Istrucciones

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Idiomas disponibles

Idiomas disponibles

Rupture valves VP
Operative instructions
4

Working test

4
Working test
a) Get the travel shaft free and be sure that the whole lift equipment is perfectly working.
a) Get the travel shaft free and be sure that the whole lift equipment is perfectly working.
b) Load the car with the nominal load and take it to the upper floor.
b) Load the car with the nominal load and take it to the upper floor.
c) Screw in screw n. 4 completely. The screw is located on OMARLIFT valve block on the pump unit.
c) Screw in screw n. 4 completely. The screw is located on OMARLIFT valve block on the pump unit.
d) Make a travel from the upper floor to the lowest one.
d) Make a travel from the upper floor to the lowest one.
e) The car speed increases and exceeds the nominal speed.
e) The car speed increases and exceeds the nominal speed.
f)
When the downward speed increases by about 30%, the rupture valve is activated. As a result, the car
f)
When the downward speed increases by about 30%, the rupture valve is activated. As a result, the car
decelerates until it comes to a stop.
decelerates until it comes to a stop.
g) If, after a few meters travel at a speed higher than the nominal one, the rupture valve has not tripped, stop
g) If, after a few meters travel at a speed higher than the nominal one, the rupture valve has not tripped, stop
the car by pushing the "STOP'' button. Adjust the rupture valve again by screwing the regulation screw
the car by pushing the "STOP'' button. Adjust the rupture valve again by screwing the regulation screw
gradually (1/4 turn by 1/4 turn) and repeat the test.
gradually (1/4 turn by 1/4 turn) and repeat the test.
h) Open screw n. 4 again by two turns and fix it with the proper nut. Check that under these conditions the
h) Open screw n. 4 again by two turns and fix it with the proper nut. Check that under these conditions the
rupture valve does not trip during the downward travel.
rupture valve does not trip during the downward travel.
Otherwise unscrew the rupture valve slightly and repeat the test.
Otherwise unscrew the rupture valve slightly and repeat the test.
i)
Once the test has finished, block the regulation screw with the lock nut and seal with red paint.
i)
Once the test has finished, block the regulation screw with the lock nut and seal with red paint.
5

Rupture valve maintenance

5
Rupture valve maintenance
For a long-lasting correct working of the valve, check the calibration of the valve once a year, at least, as per chapter
For a long-lasting correct working of the valve, check the calibration of the valve once a year, at least, as per chapter
n. 4. In case of non-tripping or doubtful operation:
n. 4. In case of non-tripping or doubtful operation:
1) replace the old valve with a new OMARLIFT one.
1) replace the old valve with a new OMARLIFT one.
2) or stop the installation and send the faulty valve to OMARLIFT to be overhauled.
2) or stop the installation and send the faulty valve to OMARLIFT to be overhauled.
WARNING
WARNING
The rupture valve has not to be modified using repaired components or parts different from the original ones.
The rupture valve has not to be modified using repaired components or parts different from the original ones.
If any damage is detected, put the lift out
If any damage is detected, put the lift out
of service, contact the supplier and replace the rupture valve promptly.
of service, contact the supplier and replace the rupture valve promptly.
The lift has not to be left into service if the rupture valve is not perfectly working.
The lift has not to be left into service if the rupture valve is not perfectly working.
6

Rupture valve effects on the lift

6
Rupture valve effects on the lift
RUPTURE VALVE TRIPPING:
RUPTURE VALVE TRIPPING:
-car stop;
- static pressure "zero";
-car stop;
- static pressure "zero";
- no downward travel even with hand
- no downward travel even with hand
emergency device;
emergency device;
- tripping of min. pressure switch, if present.
- tripping of min. pressure switch, if present.
The installation needs to be
The installation needs to be
checked and the cause of the
valve tripping has to be eliminated.
checked and the cause of the
valve tripping has to be eliminated.
REGULATION SCREW IS TOO OPEN:
REGULATION SCREW IS TOO OPEN:
- the rupture valve does not trip even if the
downward speed has been increased by
- the rupture valve does not trip even if the
closing screw n. 4 on the valve block of
downward speed has been increased by
the pump unit.
closing screw n. 4 on the valve block of
the pump unit.
The adjusting of the valve needs
to be remade and the rupture
The adjusting of the valve needs
valve working has to be
to be remade and the rupture
valve working has to be
checked.
checked.
Soggetto a modifica senza preavviso! - Subject to change without notice
Soggetto a modifica senza preavviso!- Subject to change without notice
THE REGULATION SCREW IS TOO
THE REGULATION SCREW IS TOO
CLOSED:
CLOSED:
- the lift stops immediately after the start, in
- the lift stops immediately after the start, in
downward direction;
- the lift goes up with a reduced speed;
downward direction;
- the lift goes up with a reduced speed;
- dynamic: pressure during the upward travel
- dynamic: pressure during the upward travel
is too high with respect to the static pressure.
is too high with respect to the static pressure.
The regulation screw needs to be
slightly unscrewed at the rupture
The regulation screw needs to be
valve working has
slightly unscrewed at the rupture
to be checked again.
valve working has
to be checked again.
THE RUPTURE VALVE DOES NOT
CLOSE PERFECTLY AFTER TRIPPING:
THE RUPTURE VALVE DOES NOT
- static pressure decreases immediately
CLOSE PERFECTLY AFTER TRIPPING:
- static pressure decreases immediately
after tripping and then increases to the
static pressure.
after tripping and then increases to the
static pressure.
Valve cleaning and
inspection or replacement
Valve cleaning and
have to be made.
inspection or replacement
have to be made.
Pagina/Page
D780M3L.008
01.2018
Data/Date
Versione/Issue
3
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