3-port valves vxf42..

Transcription

1 Air Comfort Air treatment 99 G.0.0 -port valves vxf.. with flanged connections, pn STAZ- and stz-» eq DATASHEETS -port valves VXf.. In boiler, district heating and refrigeration plants, cooling towers, heating groups, in ventilation and air-handling units as control or shutoff valves. For use in closed hydraulic circuits (observe cavitation). Performance valves for medium temperatures from -0 C Valve body of grey cast iron EN-GJL- DN... k VS...0 m /h Flange type, flange design VVF..K with pressure compensation to handle high differential pressure Equipable with electro-motoric actuators SAX.. or electro-hydraulic actuator SKC.. Valves Actuators Stroke SAX.. ) SKC.. mm PN Positioning force 0 N 0 N Data sheet N N C Stock number VXF.- S-V VXF.- S-V9 VXF.- S-V VXF.- ) S-V VXF.- S-V VXF.-0 ) S-V 0 DN k vs S v Δp max (m /h) (kpa) > A A 7 A A A A A A ) Suitable for medium temperatures up to C. ) Valve characteristic for k vs value m /h from 70 % stroke, k vs value 0 m /h from % stroke and k vs value 0 m /h from 90 % stroke is optimized for maximum volumetric flow.

2 Technical and mechanical design -port valves Fluids Mixing valve (preferred use) Diverting valve sizing Flow chart 0,0 0,0 0,0 0,0 0,0 0,0 0,0 0, , 0, 0, 0, 0, 0, 0, 0,0 0,0 0,0 0,0 0,0 0,0 0 0, 0 0, 0, 0, 0, 0, , k VS 0,0 0,0 0,0 0,0 0,0 0,0 0,0 0,0 0,00 0, ,, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,0 p max values apply for the mixing function.

3 Valve characteristics -port valves Throughport A-A 0 %: Linear %: Equal percentage n gl = to VDI/VDE 7 For high k vs values the valve characteristic is optimized for maximum volumetric flow k V ypass -A 0... %: Linear Tor A = constant flow Tor A = variable flow Tor = bypass (variable flow) Mixing: Flow from port A and port to port A Diverting: Flow from port A to port A and port Medium compatibility and temperature ranges Medium Temperature range T min ( C) T max ( C) Valve VXF.. Cold water - Low-temperature hot water - High-temperature hot water ) Water with antifreeze - For medium temperatures below 0 C, -0 the stem heating ASZ. has to be - - installed. Cooling water ) - - rines - For medium temperatures below 0 C, -0 the stem heating ASZ. has to be - - installed. Demineralized water according to VDI/SWKI_T0-0 ) Differentiation due to saturated steam curve ) Open circuits Note

4 Engineering notes Mounting location Preferably mount the valves at the return, as the temperature is lower there and the strain on the stem sealing gland is lower. Dirt trap Mount a dirt filter or dirt trap before the valve to ensure proper functioning, and a long service life of the valve. Remove dirt, welding beads, etc. from the valves and pipes. Cavitation Cavitation can be avoided by limiting the pressure differential across the valve depending on the medium temperature and prepressure. mounting notes Mounting position Indoors Commissioning notes Note! Ensure that actuator stem and valve stem are rigidly connected in all positions. Function check The valve may be put into operation only if actuator and valve are correctly assembled. Valve Throughport A A ypass A Valve stem extends Closes Opens Valve stem retracts Opens Closes Maintenance notes The valves are maintenance-free. When servicing valves or actuators: Deactivate the pump and turn off the power supply. Close the shutoff valves. Fully reduce the pressure in the piping system and allow pipes to completely cool down. Outdoors Disposal If necessary, disconnect the electrical wires. Due to the different types of material used, the valve must be disassembled prior to disposal. Special handling of certain valve components may be required by law or may be sensible from an ecological point of view. Local and currently valid legislation must be observed.

5 Technical data Functional data PN class PN Connection Operating pressure Valve characteristics ) Leakage rate Permissible media Throughport ypass Flange See Section Operating pressure and medium temperatures. See section Valve characteristics" % of k vs value 0. % of k vs value (k vs.) See table Medium compatibility and temperature ranges. Medium temperature -0 C Rangeability To DN : > From DN : > Nominal stroke To DN : mm From DN : mm Materials Valve body EN-GJL- lank flange VVF... SJRG Valve stem Stainless steel Seat Machined Plug rass/ronze Stem sealing gland rass EPDM O-rings PTFE sleeve silicon-free Compensation sealing Stainless steel FEPM (silicone-free) Standards Pressure Equipment Directive PED 97//EC Pressure-carrying accessories According to article, section.. Fluid group PN Without CE certification as per DN article, section (sound engineering practice) Category I, with CE certification DN PN class ISO 7 Operating pressure ISO 700, DIN EN Flanges ISO 700 Length of flanged valves DIN EN -, line Valve characteristic VDI 7 Leakage rate Throughport, bypass according to EN 0- / EN 9 Water treatment VDI

6 Technical data Standards Environmental conditions Storage: IEC 07-- Class K Temperature - + C Rel. humidity 9 % r.h. Transport: IEC 07-- Class K, M Temperature - + C Rel. humidity < 9 % r.h. Operation: IEC 07-- Class K, Z Temperature - + C Rel. humidity 9 % r.h. Environmental compatibility ISO 0 (environment) ISO 900 (quality) SN (environmentally compatible products) RL 0/9/EG (RoHS) Dimensions/Weight Dimensions See Dimensions. Weight See Dimensions. ) For certain valve lines and high k vs values, the valve characteristic is optimized for maximum volumetric flow k V. dimensions (mm) VXF.. Product number DN KG Ø D Ø D Ø D L L L Ø K H H H SAX.. VXF (x) (x) (x) SKC..