CONTROL EQUIPMENT STAZ-16, STBZ-16
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1 CONTROL EQUIPMENT STZ-16, STZ-16 INSTLLTION & MINTENNCE 3-PORT SET VLVES VXF31 Used as a control valve for mixing and distribution of heating, ventilation and air conditioning systems. Only for closed hydralic circuits. Flanged connection, PN10 Grey cast iron EN-GJL-250, valve body DN , m³/h Lift height 20 or 40mm ctuators for SK... and SKC... Media temperature: C Intended for cooling water, chilled water, hot water, tap water, water with antifreeze (max 50%) and saline. Type DN [m³/h] VXF ,5 15 VXF VXF VXF ,3 25 VXF ,5 VXF VXF VXF VXF VXF VXF VXF VXF VXF VXF VXF VXF VXF VXF VXF VXF VXF S v H 100 (mm) 1 If noise is permitted, subject to the same values as the assembly as a mixing valve. >50 > ctuators Δp max (kpa) DN Nominal size Nominal flow rate of cold water ( C) through the fully open valve (H 100 ), by a differential pressure of 100 kpa (1 bar) S v Rangeability k vs / k vr k vr Smallest k v value, at which the flow characteristic tolerances can still be maintained,by a differential pressure of 100 kpa (1 bar) H 100 Nominal stroke Δp s Maximum permissible differential pressure across valve s control path, valid for the entire actuating range of the motorized valve. SK... SKC... mixing diverting 1 mixing diverting FläktGroup DC_8792G _R0 Specifications are subject to alteration without notice
2 2 Installation & maintenance VLVE CROSS SECTION DN DN closes against pressure closes against pressure Guided plug which is integrated in the valve stem. The seats are machined in the valve body. Schematic representation, design variations are possible. CCESSORIES SZ6,5 Electric stem heater, C 24 V / 30 W, required for media below 0 C. FLOW DIGRM DN - k Δp vmax Maximum permissible differential pressure across the valve (mixing: port -, - ), valid for the entire actuating range of the motorized valve Δp v100 Differential pressure across the fully open valve and the valve s control path, - by a volume flow V 100. V 100 Volume flow through the fully open valve (H 100 ) 1 m³/h 0,278 l/s water at 20 C 100 kpa 1 bar 10 mwc FläktGroup DC_8792G _R0 Specifications are subject to alteration without notice
3 Installation & maintenance 3 VLVE FLOW CHRCTERISTIC WORKING PRESSURE ND MEDIUM TEMPERTURE Stroke H/H 100 Straight - trough 0 30 % Linear % ngl 3 as per VDI/VDE 2173 Kvs-values 100, 160, 250, 315 m3/h % Linear % Logaritmic (ngl 3) according to VDI/VDE % Optimized for maximal flow Kv100 ypass % Linear Mix: Flow from port and port to port. Distribution: Flow from port to port and port. Port Variable flow Port Straight - trough variable flow Port Flow summary + 3-way valve should be used primarily as a mixing valve. MOUNTING We recommend installation in the return pipe, as the temperatures in this pipe are lower for applications in heating systems, which in turn, extends the stem sealing gland s life. lways use a strainer upstream of the valve to increase the valve s functional safety. For media below 0 C, use the electric 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 C 24 V / 30 W operating voltage. oth valve and actuator can easily be assembled at the mounting location. Neither special tools nor adjustments are required. Working pressure (bar) Working pressure and medium temperature staged as per ISO Current local legislation must be observed COMMISSIONING MINTENNCE Medium temperature ( C) Mixing from / till Diverting from till / When mounting, pay attention to the valve s flow direction symbol. Important! Commission the valve only if the actuator has been mounted correctly. Valve stem retracts: valve opens increasing flow Valve stem extends: valve closes decreasing flow Important! Ventilen VXF31.. valves require no maintenance. When doing service work on the valve/actuator: Deactivate the pump and turn off the power supply Close the shuttoff valves Fully reduce the pressure in the piping system and allow pipes to completely cool down If necessary, disconnect the electrical wires. efore putting the valve into operation again, make certain the actuator is correctly fitted. FläktGroup DC_8792G _R0 Specifications are subject to alteration without notice
4 4 Installation & maintenance STEM SELING GLNDS INDUSTRY STNDRDS 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. DISPOSL efore disposal the valve must be dismantled and separated into its various constituent materials. Legislation may demand special handling of certain components, or it may be sensible from an ecological point of view. Current local legislation must be observed. FUNCTIONL DT PN class PN 10 according to ISO 7268 Working pressure Flow characteristic to ISO 7005 within the permissible medium temperature range according to the diagram on page 3 Through-port % Linear % Equal percentage N gl 3 to VDI / VDE ) ypass % Linear Pressure Equipment Directive Pressure Fluid group 2 Environmental compatibility MTERIL Valve body Stem Plug Sealing gland Gland materials PED 97/23/EC as per article 1, section ccessories DN without CE-marking in accordance with artical 3, section 3 (generally valid engineering practice) DN , Category 1, with CE-marking ISO (Environment) ISO 9001 (Quality) SN (Environmentally compatible products) RL 2002/95/EG (RoHS) Grey cast iron EN-GJL-250 Cr-Ni-steel DN rass DN ronze rass, silicon-free EPDM O-rings, silicon-free Leakage rate Permissible media Through-port 0...0,02 % of - value to DIN EN 1349 ypass 0,5...2 % of - value chilled water, low temperature hot water, high temperature hot water, water with anti-freeze, brine; 3) recommendation: water treatment to VDI 2035 Medium temperature 2) C Rangeability S v DN : > 50 DN : > 100 Nominal stroke DN : 20 mm DN : 40 mm 1) -values 100, 160, 250, 315 m3/h: flow characteristic is over 75 % stroke optimized for maximal flow kv 100, see page 5. 2) t media temperature <0 C, a steam heater used. National and local legislation must be observed. 3) Must not be capable, or mix, so that it attacks the valves materials. FläktGroup DC_8792G _R0 Specifications are subject to alteration without notice
5 Installation & maintenance 5 DIMENSIONS / WEIGHT Flanged connections ccording to ISO 7005 L3 H1 D4 D K H H2 D2 L2 L1 Type DN VXF VXF VXF31.24 VXF VXF31.25 VXF VXF31.39 VXF VXF31.40 VXF VXF31.50 VXF VXF31.65 VXF VXF31.80 VXF VXF31.90 VXF VXF31.91 VXF VXF31.92 VXF D D2 DN Nominal size H Total actuator height plus minimum distance to the wall or the ceiling for mounting, connection, operation, maintenance etc. H1 Dimension from the pipe centre to install the actuator (upper edge) H2 Valve in the Closed position means that the stem is fully extended D4 K L1 L2 L3 H1 H ,5 137 > 615 3,3 14 (4x) ,5 > 609 6, ,5 > (4x) , SK ,5 > , ,5 > ,5 (8x) ,5 > (8x) ,5 > H SKC Vikt (kg) 10,4 18,5 FläktGroup DC_8792G _R0 Specifications are subject to alteration without notice
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