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_b 2020-05-19 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 ● ● ● ● ● Siemens Smart Infrastructure ∆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 medium temperature as per IS0 7005 Current local legislation must be observed. Type summary Product number Stock number DN Kvs [m3/h] SV VAF41.65-63/1 S55232-V110 65 63 200 VAF41.80-100/1 S55232-V111 80 100 VAF41.100-160 S55232-V107 100 160 VAF41.125-250 S55232-V108 125 250 VAF41.
Spare parts Mounting sets for Product number Stock number Valve Actuator VAF41...65-63/1 VAF41.80-100/1 GEB..1E ASK77.23 S55845-Z252 VAF41...65-63/1 VAF41.80-100/1 GCA..1E ASK77.21 S55845-Z203 VAF41.100-160 VAF41.125-250 GIB..1E VAF41...150-360 2*GIB..1E ASK77.22 S55845-Z204 Example Equipment combinations Actuators GEB..1E Additional mounting set 1) GCA..1E GIB..1E 2*GIB..1E ASK77.21 1) 1) Ball valves ∆pmax ∆ps ∆pmax ∆ps VAF41.65-63/1 400 400 400 400 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 GIB135.1E GIB135.1E GIB136.
Notes Security CAUTION National safety regulations Failure to comply with national safety regulations may result in personal injury and property damage. ● Observe national provisions and comply with the appropriate safety regulations. Engineering We recommend installing the ball valve in the return pipe, as the temperature is ● higher for application in cooling systems and ● lower for applications in heating systems, which could extend the life of stem sealing gland.
Maintenance VAF41.. ball valves with assembled rotary actuator require no maintenance. Warnings: ● When performing service work on the ball valve / rotary actuator: – Deactivate the pump and disconnected the pump power supply – Close the manual shutoff valves ● Fully release the pressure in the piping system and allow pipes to completely cool down. ● If necessary, disconnect the electrical wires of actuator before performing the service work.
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 DN = Nominal size H = Total actuator height plus minimum distance to the wall or the ceiling for mounting, connection, operation, service, etc. H1 = Dimension from the pipe centre to install the actuator (upper edge) H2 = Dimension from the pipe center to the top of the shaft L L1 L2 L3 D n [mm] [mm] [mm] [mm] [mm] D2 [mm] D4 [mm] D5 [mm] H 65 90 150 36 16 118 4 19 65 145 > 550 153 331 226 5.
Issued by Siemens Switzerland Ltd Smart Infrastructure Global Headquarters Theilerstrasse 1a CH-6300 Zug Tel. +41 58 724 2424 www.siemens.com/buildingtechnologies 12 Siemens Smart Infrastructure Document ID A6V11168935_b Edition 2020-05-19 © Siemens Switzerland Ltd, 2020 Technical specifications and availability subject to change without notice.
