User Manual

2
Siemens
A6V12045425_en--_b
Smart Infrastructure
2020-08-12
Use
This device is used as motorized or shut-off valves in heating, ventilation and air conditioning
systems applications.
● In open and closed circuits
● For 2-position (SPDT) (by SQL321B…)
● For DC 0…10 V control signals (by SQL361B.. actuator) and 4..20 mA control signals (by
SQL351B.. actuator)
● For chiller and cooling tower sequencing circuits
● To open or close the flow to a heat exchanger or to complete plant sections
Type summary
Product number
Stock number
DN
K
vs
Top Flange
Flow velocity of medium
1)
[m
3
/h]
EN ISO 5211
Water [m/s]
VFF41.40
S55235-V137
40
55
F07
4.5
VFF41.50
S55235-V120
50
70
VFF41.65
S55235-V121
65
155
VFF41.80
S55235-V122
80
250
VFF41.100
S55235-V123
100
510
VFF41.125
S55235-V124
125
820
VFF41.150
S55235-V125
150
1350
VFF41.200
S55235-V126
200
3100
VFF41.250
S55235-V127
250
4550
F10
VFF41.300
S55235-V128
300
7500
VFF41.350
S55235-V129
350
10250
F12
VFF41.400
S55235-V130
400
14100
VFF41.450
S55235-V131
450
18500
F14
VFF41.500
S55235-V132
500
24000
VFF41.600
S55235-V133
600
37000
F16
VFF41.700
S55235-V134
700
42420
VFF41.800
S55235-V135
800
58490
F25
VFF41.900
S55235-V136
900
74020
1)
Recommended maximum velocity of flow and the butterfly valve fully open
K
vs
Nominal flow rate of cold water (5…30 °C) through the fully open butterfly valve by a differential pressure
of 100 kPa (1 bar)
Ordering
Butterfly valve, actuator must be ordered separately.
When ordering, please specify the quantity, product name and product number.
Example:
Product No.
Stock No.
Product Name
Quantity
VFF41.150
S55235-V125
Butterfly valve
1
Delivery
● Butterfly valve and actuator are packed separately.
Rev. No.
● Please see chapter “Revision numbers” on page 10.