2-PORT SEAT VALVES PN16 WITH FLANGED CONNECTIONS STAZ-16, STBZ-16, STCZ-52 DATASHEET

Transcription

1 -PORT SEAT VALVES PN WITH FLANGED CONNECTIONS STAZ-, STBZ-, STCZ- DATASHEET 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 0 C Valve body of grey cast iron EN-GJL- DN...00 k VS...0 m /h Flange type, flange design B Equipable with electro-motoric actuators or electrohydraulic actuator STAZ-, STBZ- and STCZ-0 Valves Actuators Stroke STCZ-0 cccc=-000 ) STCZ-0 cccc>000 mm PN Positioning force 0 N 0 N Data sheet N N STCZ C Stock number DN k vs (m /h) S v Δp s Δp max Δp s Δp max cccc=000 VVF.-0 S-V 0 cccc=00 VVF.- S-V 0 0 cccc=00 VVF.- S-V cccc=000 VVF.-00 ) S-V 00 > 00 7 cccc= VVF.00- S-V 00 cccc=00 VVF.00-0 ) S-V ) Suitable for medium temperatures up to 0 C. ) Valve characteristic for k vs value 00 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. FläktGroup DC_99GB 07_R0 We reserve the right to make changes without prior notice

2 Datasheet TECHNICAL AND MECHANICAL DESIGN -port valves The illustrations show the basic design of the valves. Constructional features, such as the shape of plugs, may differ. Fluids Closing against the pressure Note! -port valves do not become -port valves by removing the blank flange!. A A B For use with all actuators 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 0,0 0,0 0,0 0,0 0,0 0,0 0,0 0,00 0, k VS ,, 0, 0, 0, 0, 0, 0, 0, 0, 0,0 p max values apply for the mixing function. FläktGroup DC_99GB 07_R0 We reserve the right to make changes without prior notice

3 Datasheet VALVE CHARACTERISTICS -port valves Flow rate kv /kvs 0, 0, 0, 0 0 0, 0, 0, 0 0 %: Linear 0 00 %: Equal percentage n gl = to VDI/VDE 7 For high k vs values the valve characteristic is optimized for maximum volumetric flow k V00. Stroke H / H 00 OPERATING PRESSURE AND MEDIUM TEMPERATURE Fluids, PN with V..F.. Operating pressure (bar) Medium temperature [ C] Curve for saturated steam; steam forms below this line Operating pressure according to EN 09, valid for -port valves with blank flange Operating pressure and operating temperatures according to ISO 700, EN 09 and EN. Notes! All relevant local directives must be observed. MEDIUM COMPATIBILITY AND TEMPERATURE RANGES Medium Temperature range T min ( C) T max ( C) Valve VVF.. Cold water - Low-temperature hot water 0 - High-temperature hot water ) Water with antifreeze - 0 For medium temperatures below 0 C, -0 0 the stem heating ASZ. has to be installed. Cooling water ) - - Brines - 0 For medium temperatures below 0 C, -0 0 the stem heating ASZ. has to be installed. Demineralized water according to VDI/SWKI_BT0-0 0 ) Differentiation due to saturated steam curve ) Open circuits Note FläktGroup DC_99GB 07_R0 We reserve the right to make changes without prior notice

4 Datasheet 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. COMMISSIONING NOTES The valve may be put into operation only if actuator and valve are correctly assembled. 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. 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. Note! Ensure that actuator stem and valve stem are rigidly connected in all positions. FUNCTION CHECK Valve Throughport A AB Bypass B AB Valve stem extends Closes Opens Valve stem retracts Opens Closes FläktGroup DC_99GB 07_R0 We reserve the right to make changes without prior notice

5 Datasheet TECHNICAL DATA Functional data PN class PN Connection Operating pressure Valve characteristics ) Leakage rate Permissible media Throughport Bypass Flange See Section Operating pressure and medium temperatures. See section Valve characteristics" % of k vs value Medium temperature -0 0 C 0. % of k vs value (k vs.) See table Medium compatibility and temperature ranges. Rangeability To DN : > 0 From DN : >00 Nominal stroke To DN : mm From DN 00: mm Materials Valve body EN-GJL- Blank flange VVF... SJRG Valve stem Seat Plug Stem sealing gland Compensation sealing Stainless steel Machined Brass/Bronze Brass EPDM O-rings PTFE sleeve silicon-free Stainless steel FEPM (silicone-free) Standards Pressure Equipment Directive PED //EU Pressure-carrying accessories Scope: Article, section Definitions: Article, section Fluid group PN Without CE certification as per article, section (sound engineering practice) Category I, Modul A, with CE-marking as per article, section DN 0 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 Water treatment VDI Throughport, bypass according to EN 0- / EN 9 FläktGroup DC_99GB 07_R0 We reserve the right to make changes without prior notice

6 Datasheet TECHNICAL DATA Standards Environmental conditions Environmental compatibility Storage: IEC 07-- Transport: IEC 07-- Operation: IEC 07-- Class K Temperature - + C Rel. humidity Class 9 % r.h. K, M Temperature -0 + C Rel. humidity Class < 9 % r.h. K, Z Temperature - + C Rel. humidity Dimensions/Weight Dimensions See Dimensions. Weight 9 % r.h. ISO 0 (environment) ISO 900 (quality) SN 0 (environmentally compatible products) RL 0/9/EG (RoHS) See Dimensions. ) For certain valve lines and high k vs values, the valve characteristic is optimized for maximum volumetric flow kv 00. DIMENSIONS (mm) DN KG B Ø D Ø D Ø D L L L Ø K H H H STCZ-0 cccc=-000 STCZ-0 cccc> (x) (x) (x) FläktGroup DC_99GB 07_R0 We reserve the right to make changes without prior notice