GMV VC 3006 User manual

RUPTURE VALVE VC 3006 - types A*,B,R,G,E*
This device consists of a valve which stops (completely or partially) the oil flow when downward speed exceeds the
preset value.Thisdevice ensures a deceleration lower than gn(9,81 m/s2).
These valves are designed and manufactured to a safety factor greater than 1,7 with respect to the proof stress
(non-proportional elongation) calculated on a pressure 2,3 times the maximum static one (45 bar).
SETTING OF THE RUPTURE VALVE :
- Calculate the tripping flow with the following formula:
Qi=
where:
Qi= maximum tripping flow of the valve [l/min]
Vd= rated downward speed of the car [m/s]
A = ram area [cm2]
Nvc = number of jack connected to the rupture valve
cm= reeving ratio (1 for direct installation 1:1,2 for indirect installation 2:1)
- Remove the cap from the adjusting screw and untight the locking nut.
- Screw the adjustment screw in to stop and measure the quote Xo (valve completely closed).
- Read on the diagram for valve setting the quote X with respect to the tripping flow and to the valve dimension
(es: VC 3006/B 1"1/4; Qi = 150 l/min; X = 9mm)
- Screw out the adjustment screw to obtain the requested quote X + Xo.
CHECKING OF THE RUPTURE VALVE:
- Call the car with full load to the top floor.
- Tight screw #5 to stop and call the lift back to the bottom floor.
- When the lift reaches the downward speed according the tripping flow, the rupture valve closes and the car stops
In case of rupture valve with by-pass, the car will continue to descend with low speed. If the valve does not close it is necessary
to re-adjust it:
- Untight the locking nut and screw in the adjustment screw one turn.
- Call the lift to the top floor and then back to the bottom floor.
- Repeat this operation until the valve closes.
- Screw out #5 to stop and be sure the valve does not trip during a normal down travel.
IMPORTANT!!!
Once the check is done re-assemble the cap on the adjusting screw.
(*) not certified
Table 1 - area for single ram jacks
ram HL 55 HL 65HL 75
A [cm2]
28,26 38,46 50,24
ram 50 60 70 80 90 100 110 120 130 140 150 180 200 238
A [cm2]19,63 28,27 38,48 50,27 63,62 78,54 95,03 113,10 132,73 153,94 176,71 254,47 314,16 444,88
Table 2 - equivalent area for telescopic jacks with hydraulic synchronization
jack type T42 T50 T63 T70 T85 T100
C2 (2 stages) A [cm2]21,14 29,40 44,22 59,59 84,94 117,61
C3 (3 stages) 33,25 44,04 66,63 88,83 132,27 176,15
Table 3 - equivalent area for telescopic jacks with mechanical synchronization (by chains)
jack type TCS/EC 60 TCS/EC 75 TCS/EC 90 TCS/EC 105 TCS/EC 120
-2N, Y (2 stages) A [cm2]36,76 54,55 75,87 100,73 129,12
-3Y (3 stages) 45,95 65,50 88,59 115,22 *****
-4Y (4 stages) 56,32 77,64 102,50 ***** *****
V(d13)6AN
vc
⋅⋅⋅,⋅ cm
--------------------------------------------------------
INSTRUCTION FOR
RUPTURE VALVE SETTING
table :
date : 06.005
revision :
page : D19/01/1998
1/3
09/11/2017

INSTRUCTION FOR
RUPTURE VALVE SETTING
RUPTURE VALVE AND DISTRIBUTOR "3010"
DIAGRAM FOR VC3006 ADJUSTMENT
tripping flow [l/min]
dimension x [mm]
table :
date : 06.005
revision :
page : D19/01/1998
2/3
09/11/2017

tripping flow [l/min]
dimension x [mm]
DIAGRAM FOR VC3006 3/4” ADJUSTMENT
INSTRUCTION FOR
RUPTURE VALVE SETTING
table :
date : 06.005
revision :
page : D19/01/1998
3/3
09/11/2017