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 DN25... 150 2,5... 315 m³/h Lift height 20 or 40mm ctuators for SK... and SKC... Media temperature: -25...+150 C Intended for cooling water, chilled water, hot water, tap water, water with antifreeze (max 50%) and saline. Type DN [m³/h] VXF31.15-2.5 2,5 15 VXF31.15-4 4 VXF31.24 5 VXF31.25-6.3 6,3 25 VXF31.25 7,5 VXF31.25-10 10 VXF31.39 12 VXF31.40-16 16 40 VXF31.40 19 VXF31.40-25 25 VXF31.50 31 50 VXF31.50-40 40 VXF31.65 49 65 VXF31.65-63 63 VXF31.80 78 80 VXF31.80-100 100 VXF31.90 124 100 VXF31.100-160 160 VXF31.91 200 125 VXF31.125-250 250 VXF31.92 300 150 VXF31.150-315 315 S v H 100 (mm) 1 If noise is permitted, subject to the same values as the assembly as a mixing valve. >50 >100 20 300 40 ctuators Δp max (kpa) DN Nominal size Nominal flow rate of cold water (5...30 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 1 100 70 200 70 150 60 100 50 FläktGroup DC_8792G 20180529_R0 Specifications are subject to alteration without notice
2 Installation & maintenance VLVE CROSS SECTION DN 15 40 DN 50 150 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 20180529_R0 Specifications are subject to alteration without notice
Installation & maintenance 3 VLVE FLOW CHRCTERISTIC WORKING PRESSURE ND MEDIUM TEMPERTURE 1 0.8 0.6 0.4 0.2 0 - - 0 0.2 0.4 0.6 0.8 1 Stroke H/H 100 Straight - trough 0 30 % Linear 30 100 % ngl 3 as per VDI/VDE 2173 Kvs-values 100, 160, 250, 315 m3/h 0...30 % Linear 30...75 % Logaritmic (ngl 3) according to VDI/VDE 2173 75...100 % Optimized for maximal flow Kv100 ypass 0...100% 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) 10 9 8 7 6 1 0-60 -40-20 -10 0 20 80 100 120 150 160 Working pressure and medium temperature staged as per ISO 7005. Current local legislation must be observed. 90 90 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 20180529_R0 Specifications are subject to alteration without notice
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 0...30 % Linear 30...100 % Equal percentage N gl 3 to VDI / VDE 2173 1) ypass 0...100 % 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 2.1.4 ccessories DN 15...100 without CE-marking in accordance with artical 3, section 3 (generally valid engineering practice) DN 125...15, Category 1, with CE-marking ISO 14001 (Environment) ISO 9001 (Quality) SN 36350 (Environmentally compatible products) RL 2002/95/EG (RoHS) Grey cast iron EN-GJL-250 Cr-Ni-steel DN 15...40 rass DN 50...150 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) 10...150 C Rangeability S v DN 15... 40: > 50 DN 50...150: > 100 Nominal stroke DN 15...80: 20 mm DN 100...150: 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 20180529_R0 Specifications are subject to alteration without notice
Installation & maintenance 5 DIMENSIONS / WEIGHT Flanged connections ccording to ISO 7005 L3 H1 D4 D K H H2 D2 L2 L1 Type DN VXF31.15-2.5 VXF31.15-4 VXF31.24 VXF31.25-6.3 VXF31.25 VXF31.25-10 VXF31.39 VXF31.40-16 VXF31.40 VXF31.40-25 VXF31.50 VXF31.50-40 VXF31.65 VXF31.65-63 VXF31.80 VXF31.80-100 VXF31.90 VXF31.100-160 VXF31.91 VXF31.125-250 VXF31.92 VXF31.150-315 D 15 14 95 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 H2 46 65 40,5 137 > 615 3,3 14 (4x) 25 16 115 65 85 34 130,5 > 609 6,3 40 18 150 50 20 84 110 200 100 100 39 135,5 > 614 19 (4x) 165 99 125 230 115 115 13,8 65 185 118 145 290 145 145 80 22 200 SK 60 156,5 > 635 132 160 310 155 155 24,1 19 100 24 220 156 180 350 175 175 93 209,5 > 666 36,5 (8x) 125 26 150 285 250 184 210 400 200 200 104 220,5 > 677 50 23 (8x) 211 240 480 240 240 120 236,5 > 693 70 H SKC Vikt (kg) 10,4 18,5 FläktGroup DC_8792G 20180529_R0 Specifications are subject to alteration without notice