Valve Adjustment - GMV VC 3006 Serie Instrucciones De Regulacion, Uso Y Manutención

GB

7. VALVE ADJUSTMENT

Adjustment and testing are always necessary in the installation phase.
The valve should be adjusted to intervene before the down speed of the cabin reaches
V + 0,3 m/s.
d
7.1 Trigger flow rate calculation
The maximum trigger flow rate must be calculated in the elevator design phase. If the value
is not determined at design phase, it should be calculated at the installation phase.
The maximum trigger flow rate of the Rupture Valve is calculated using the following formula:
( ) 6 A N
V + 0 3 ,
d
Q = ----------------------------------------------------------- -
i max
where:
Q = Maximum flow rate at which the valve actuates [l/min]
i max
V = Nominal down speed [m/s]
d
A = Equivalent cross-sectional area or of telescopic pistons [cm
N = Number of pistons connected to rupture valve
VC
(If there are more than one)
c = Coefficient (1 for direct acting 1:1, 2 for indirect acting 2:1)
m
Therefore the maximum flow rate Q
speed, and the maximum flow rate Q
For Vd < = 1,00 m/s it is recommended to use the following formula:
( ⋅ ) 6 A N ⋅ ⋅
V 1 3 ,
d
Q = --------------------------------------------------------- -
i
c
m
Table 4 - Single stage piston effective area
ram HL55 HL65
2
28,26 38,46
A [cm ]
ram 50 60
2
19,63 28,27
A [cm ]
Table 5 - Hydraulically synchronised telescopic piston equivalent effective area
piston type
C2 (2 stages)
A [cm
C3 (3 stages)
Table 6 - Mechanically synchronised telescopic piston effective equivalent area
piston type
-2N, Y (2 stages)
-3Y (3 stages)
-4Y (4 stages)
⋅ ⋅ ⋅
VC
c
m
should be set between the flow rate at nominal down
i
i max
⋅
VC
HL75
50,24
70 80 90
38,48 50,27 63,62
T42 T50
21,14 29,40
2
]
33,25 44,04
TCS/EC 60
36,76
2
45,95
A [cm ]
56,32
corresponding to Vd + 0,3 m/s.
100 110 120
78,54 95,03 113,10 132,73 176,71 254,47 314,16 444,88
T63 T70 T85
44,22 59,59 84,94
66,63 88,83 132,27
TCS/EC 75 TCS/EC 90
54,55 75,87
65,50 88,59
77,64 102,50
22
2
]
130 150 180
T100
117,61
176,15
TCS/EC 105 TCS/EC 120
100,73
115,22
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200 238
129,12
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