2-port control ball valves for flanged connection, PN16 VAF41.. For use in heating, ventilation and air conditioning systems as a control or shutoff valve. ● ● ● ● ● ● A6V11168935_en--_d 2022-02-23 Dutctile iron, EN-GJS-450-10 (QT450) valve body DN 65...150 kvs 63...360 m3/h Angle of rotation 90° Flange connection to ISO 7005-2 Used with rotary actuators GEB..1E and GIB..1E without spring return and GCA..
Use For use in heating, ventilation and air conditioning systems as a control or shutoff valve. For closed circuits of cooling water (Refer to Cavitation).
Sizing Flow diagram ● ● ● ● ● ∆pmax = Maximum permissible differential pressure across the valve, valid for the entire actuating range of the motorized valve. For low noise operation we recommend a maximum permissible differential pressure of 240 kPa ∆pv100 = Differential pressure across the fully open valve and the valve’s control path by a volume flow V100 V100 = Volumetric flow through the fully open valve 100 kPa = 1 bar ≈ 10 mWC 1 m3/h = 0.
Valve flow characteristic 0…90 º equal percentage nql = 3.0 to VDI / VDE 2173 Cavitation Cavitation accelerates wear on the ball and seat, and also results in undesirable noise. Cavitation can be avoided by not exceeding the differential pressure shown in the Flow diagram, and by adhering to the static pressures shown below. Note on chilled water: To avoid cavitation in chilled water circuits, please ensure sufficient counter pressure at valve outlet, e.g. by a throttling valve after the heat exchanger.
Working pressure and temperature Working pressure and medium temperature as per IS0 7005 Current local legislation must be observed. Type summary Product number Stock number DN Kvs SV [m3/h] VAF41.65-63/1 S55232-V110 65 63 VAF41.80-100/1 S55232-V111 80 100 VAF41.100-160 S55232-V107 100 160 VAF41.125-250 S55232-V108 125 250 VAF41.
Delivery ● Ball valve and its related mounting sets are packed together. ● Ball valves and rotary actuators are packed and delivered separately. ● The ball valves are supplied without counter-flanges and flange gaskets. Spare parts Mounting sets for Product number Stock number Valve Actuator VAF41...65-63/1 GEB..1E ASK77.23 S55845-Z252 GCA..1E ASK77.21 S55845-Z203 ASK77.22 S55845-Z204 Example VAF41.80-100/1 VAF41...65-63/1 VAF41.80-100/1 VAF41.100-160 GIB..1E VAF41.125-250 VAF41...
Actuator overview Type Stock number Open-loop control Operating voltage Positioning signal input Y Position indicator U = DC 0…10V ⎓ Feedback potentiometer GEB141.1E S55499-D329 - - S55499-D330 AC 24 V ~ / DC 24…48 V ⎓ - GEB142.1E 2- or 3position GEB146.1E S55499-D331 GEB341.1E S55499-D336 GEB346.1E S55499-D337 GEB161.1E S55499-D332 GEB163.1E S55499-D333 GEB164.1E S55499-D334 GEB166.1E S55499-D335 GEB361.1E S55499-D338 GIB131.1E GIB131.1E GIB135.
Product documentation Topic Title Document ID Mounting and installation VAF41.. Mounting instructions A5W90003152 Data sheet VAF41.. Data sheet A6V11168935 Environmental compatibility Product environmental compatibility A5W90003652 Related documents such as environmental declarations, CE declarations, etc., can also be downloaded at the following Internet address: www.siemens.
Direction flow Pay attention to the valve's flow direction symbol during mounting. Commissioning NOTICE Commission the ball valve only if the rotary actuator has been mounted correctly. ● ● Ball valve rotation counter clockwise: ball valve opens = increasing flow Ball valve rotation clockwise: ball valve closes = decreasing flow Maintenance VAF41.. ball valves with assembled rotary actuator require no maintenance.
Technical data Functional data PN class PN 16 to ISO 7268 Working pressure To ISO 7005 within the permissible “medium temperature ” range according to the diagram in Working pressure and temperature. Flow characteristic Equal percentage; ngl = 3.0 to VDI / VDE 2173 (modified) Leakage rate 0…0.
Dimensions Dimensions in mm ● ● ● ● Type DN Valve Actuator VAF41.65-63/1 GEB..1E L L1 L2 L3 D n [mm] [mm] [mm] [mm] [mm] D2 D4 D5 [mm] [mm] [mm] H DN = Nominal size H = Total actuator height plus minimum distance to the wall or the ceiling for mounting, connection, operation, service, etc.
Issued by Siemens Switzerland Ltd Smart Infrastructure Global Headquarters Theilerstrasse 1a CH-6300 Zug +41 58 724 2424 www.siemens.com/buildingtechnologies Document ID A6V11168935_en--_d Edition 2022-02-23 © Siemens Switzerland Ltd, 2020 Technical specifications and availability subject to change without notice.
