Three-port valves. Special versions with special stem sealing gland for: High temperature hot water C Thermo oils

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1 4 440 Three-port valves with flange, PN6 VXF4... Three-port valves with flange, PN6 Can be used as mixing or diverting valves Grey cast iron GG-25 DN mm k vs m 3 /h Stroke 20 or 40 mm Can be equipped with actuators SQX..., SKD..., SKB... and SKC... Use In district heating, heating, ventilating, and air conditioning systems as a control valve for "mixing" or "diverting" function. For open and closed circuits. Media Standard versions with standard stem sealing gland for: Cooling water Chilled water Low temperature hot water C High temperature hot water ) 2) Water with anti-freeze ) 2) Brine Special versions with special stem sealing gland for: High temperature hot water C Thermo oils ) Media below 0 C: ASZ6.5 stem heating element required to prevent freezing of the valve stem in the sealing gland 2) Water with anti-freeze and brine: up to max. 0 C as per DIN 358 (stress case I) or up to 25 C as per DIN 358 (stress case II) Siemens Building Technologies CMN4440E / HVAC Products /6

2 Type summary Standard version Type DN k vs S v p vmax. mixing diverting [mm] [m 3 /h] kpa kpa VXF4.4 ) 5/0,9 VXF4.5 ) 5 3 > 50 VXF4.24 ) 25/20 5 VXF4.25 ) 25 7,5 > ) VXF4.39 ) 40/32 2 > 50 VXF4.40 ) 40 9 > 00 VXF4.49 ) 50/40 9 > 50 VXF4.50 ) 50 3 > 00 VXF VXF VXF > VXF VXF Special versions with type suffix 4 For media and temperatures Example: High temperature hot water C VXF4.504 Thermo oils ) With tight bypass (actuator SQX...) 2) If noise is permitted, the same values apply as for mixing DN = Nominal diameter p vmax. = Max. permissible differential pressure k vs = Nominal flow value as per VDI 273 across the control path (II-I = mixing S v = Rangeability as per VDI 273 or I-II = diverting) of the valve valid for entire stroke range Accessories Electric stem heating element, AC 24 V, required for media below 0 C: ASZ6.5 Ordering Delivery When ordering, please indicate type reference and type suffix (where required). Example: VXF4.50 Both the valve and the actuator are packed and supplied separately. The valves are supplied without counter-flanges and without flange gaskets. Equipment combinations Valves Actuators ) SQX... 2) 3) SKD... 2) SKB... SKC... mixing divertin mixing divertin mixing g g H 00 mixing divertin g [mm] p max [kpa] divertin g VXF4.4 VXF ) ) VXF4.24 VXF ) VXF VXF4.40 VXF VXF4.50 VXF ) VXF VXF VXF VXF Data sheet ) Actuators available for delivery: AC 24 V / AC 230 V with 3-position signal AC 24 V with proportional pos. signal DC V or DC ma 2) Usable up to max. medium temperature of 40 C 3) The p max and p values are valid for the new SQX32... / SQX82... and SQX62 actuators; deliverable from January 999 4) If noise is permitted, the same values apply as for mixing CMN4440E / Siemens Building Technologies 2/6 HVAC Products

3 H 00 = 00% stroke of the valve and the actuator p max = Max. permissible differential pressure across the control path (II-I = mixing or I-II = diverting) of the valve across the entire actuating range of the motorized valve Pneumatic actuators Mechanical design Valve cross-section Pneumatic actuators are available on request from your local office. Application is possible only if the VXF4... is used as a mixing valve. 4440Z0 Depending on the nominal size, a guided perforated or slot plug is used that is directly connected to the valve stem. DN with tight bypass when the SQX... actuator is used. The seats are attached to the valve body with the aid of special gland material. Disposal The various material types used require that you disassemble the unit and sort the components prior to disposal. Sizing Sizing diagram p v00 [bar] 0,0 0,02 0,03 0,04 0,05 0, 0,2 0,3 0,4 0, V 00 [m³/h] ,8 0,6 0,5 0,4 0,3 0,2 DN , 50/ / ,5 25/ /0 -,9 p vmax ,4 6,8 4,2 8,4 5,8 2,8 2,2,7,4, 0,85 0,6 V 00 [l/s] 0,3 0,2 0,75 0,5 0, 0,08 0, p v00 [kpa] D0 00 kpa = bar 0 mwg m 3 /h = kg/s water at 20 C = p vmax. = Max. permissible differential pressure across the mixing valve's II-I control path (actuator) valid for the entire stroke range Siemens Building Technologies CMN4440E / HVAC Products 3/6

4 path = p vmax. = Max. permissible differential pressure across the diverting valve's I-II control (actuator) valid for the entire stroke range Valve flow characteristic Working pressure and temperature p v00 = Pressure difference across the fully opened valve (actuator) across the control path (II-I = mixing or I-II = diverting) at flow & V00 &V00 = Flow in m3 /h Flow k v / k vs Working pressure [bar] 0,8 0,6 0,4 0, l ll lll l - lll l - ll 0 0 0,2 0,4 0,6 0,8 Stroke H / H 00 Use the three-port valve primarily as a mixing valve D02E Valve flow characteristic in the through-port %: linear %: n gl = 3 as per VDI / VDE 273 Bypass %: linear Mixing: Diverting: Port I Port II Port III Working temperature [ C] Flow from port II and port III to port I Flow from port I to port II and port III = constant flow = variable flow = bypass (variable flow) Working pressure staged as per ISO 7268 and EN 333 at operating temperatures of C as per DIN 4747 and DIN D03E Note Engineering Mounting Water quality requirements as per VDI In open circuits, there is a risk of valve plug seizing caused by scale deposits. Thus, use only the most powerful actuators SKB... or SKC... for these applications. Additionally, periodic actuation (twice or three times per week) must be planned. Always use a strainer upstream of the valve. We generally recommend that you install a strainer even with closed circuits to increase the valve's functional safety. For media below 0 C, use the electric ASZ6.5 stem heating element to prevent the valve stem from freezing in the sealing gland. For safety reasons, the stem heating element has been designed for AC 24 V / 30 W operating voltage. Both valve and actuator can easily be assembled at the mounting location. Neither special tools nor adjustments are required. The valve is supplied with mounting instructions. CMN4440E / Siemens Building Technologies 4/6 HVAC Products

5 Mounting positions Permissible 4440Z05 Not permissible Siemens Building Technologies CMN4440E / HVAC Products 5/6

6 Direction of flow When mounting, pay attention to the valve's flow direction symbol: Mixing from II / III to I Diverting from I to II / III ll l l l l ll l l 4440Z06 Commissioning Commission the valve only if the actuator has been mounted correctly. Stem retracts: Through-port opens, bypass closes Stem extends: Through-port closes, bypass opens Service Stem sealing gland For actuator service work: Turn off the pump and the operating voltage, close the shutoff valves, depressurize the pipes and allow them to cool down. Disconnect the electrical connections, where required, from the terminals. Recommission the valve only if the actuator has been mounted correctly. The glands can be exchanged without removing the valve, provided the pipes are depressurized and cooled off and the stem surface is unharmed. If the stem is damaged in the gland range, replace the entire stem-plug-unit. Contact your local office or branch. Spare parts Standard version Special version 4440Z02 Replacement for EPDM-O-ring sealing gland, including flat seal made from copper, for cooling water, chilled water, low temperature hot water, high temperature hot water, and brine C For VXF4... DN (Stem dia. 0 mm) For VXF4... DN (Stem dia. 4 mm) Replacement for PTFE sealing gland, including flat seal made from copper, for high temperature hot water, saturated steam, hot steam, and thermo oils C For VXF DN (Stem dia. 0 mm) For VXF DN (Stem dia. 4 mm) Z04 Warranty The use of third-party actuators expressly voids any warranty claims. The technical data p max, p s, leakage rate, noise level and life apply only when used together with the Landis & Staefa actuators as listed in "Type summary". Technical data Function data PN class PN6 Valve flow characteristic Through-port % linear % n gl = 3 as per VDI / VDE 273 Bypass % linear Leakage rate Through-port % of k vs value, VDI / VDE 273 Bypass DN with SQX... actuator % of k vs value, VDI / VDE 273 DN with actuators SKD..., SKB... and SKC % of k vs value Permissible pressure 600 kpa (6 bar), ISO 7268 / EN 333 Working pressure DIN 4747 / DIN 358 in the range of C Flange connections ISO 7005 Stroke DN mm CMN4440E / Siemens Building Technologies 6/6 HVAC Products

7 DN mm Materials Valve body GG-25 as per DIN EN 56 Seat, plug, and stem stainless steel Sealing gland Standard version brass Special version stainless steel Gland materials EPDM-O-rings, PTFE sleeves Dimensions H H2 B L3 D2 D4 D K H L2 D DN 4440M0 L DN B D D2 D4 H H2 K L L2 L3 Weight [mm] dia. dia. dia. [kg] (4x) (4x) (8x) (8x) DN H DN = Nominal diameter [mm] SQX... SKD... SKB... SKC... 5 > 489 > 564 > 639 H = Total actuator height plus minimum distance to 25 > 489 > 564 > 639 the wall or the ceiling for mounting, connection, operation, 40 > 482 > 557 > 632 service, etc. 50 > 52 > 596 > > 689 H = Dimension from the pipe centre to install 80 > 70 the actuator (upper edge) Siemens Building Technologies CMN4440E / HVAC Products 7/6

8 00 > > 738 H2 = Valve in the "Closed" position means that 50 > 76 the stem is fully extended Dimensions in mm 998 Siemens Building Technologies Ltd. Replaces CEN4452E CMN4440E / Siemens Building Technologies 8/6 HVAC Products