Maintenance-free shut-off globe valves PN 25/40 DN Standard variants. Application. Operating data. Materials

Transcription

1 Type series booklet /11-10 NORI 40 Maintenance-free shut-off globe valves with bellows with two-piece stem Type ZXLB Type ZXSB Our bellows seal valves meet the requirements of the TA-Luft (German Clean Air Act) flanged or with butt- or socket weld ends PN 25/40 DN DN see type sheet BOA-H/HE Application In industrial plants, building services industry, power stations and marine engineering For water, steam, gas and other non-aggressive media Other applications on request Operating data Maximum allowable pressure 40 bar Maximum allowable temperature 450 C Pressure-temperature ratings see next side Materials Flanged design DN forged steel P 250 GH DN cast steel GP 240 GH+N N Weld end design DN forged steel P 250 GH DN cast steel GP 240 GH+N N Design Tapered plug Two-piece stem Back seat Safety gland with gland cover Position indicator Inside and outside confined cover seal Materials free from non-ferrous metals Yoke suitable for mounting electric and pneumatic actuators (DIN ISO 5210/5211) EC type tested (Module H), component mark TÜ.A.-209 Exterior finish: blue RAL 5002 The valves meet the safety requirements of the Pressure Equipment Directive 97/23/EC (PED) of annex I for fluids of the groups 1 and 2. Standard variants Throttling valve plug Cone with GYLON-gasket (max. 240 C) Pilot plug (from DN 125) Locking device/stroke limitation Nuts and bolts (tough at subzero temperature) Free from oil and grease Stellited seat faces Body/cover seal-welded Leakage detection hole Gasket PTFE-coated (max. 300 C) Serrated gasket, PTFE or graphite-coated PTFE gland box (max. 300 C) Dried for chlorine applications Position switch Other flange and butt-weld end designs onacceptance tests to technical codes such as TRD/TRB/AD2000 or customer specificati. Remarks Operating instructions: On all enquiries / orders please specify 1 Type 6 Medium 2 PN 7 Operating temperature 3 DN 8 Pipe connection 4 Working pressure 9 Standard variants 5 Differential pressure 10 Type sheet number The valves do not have a potential internal source of ignition and can be used in potentially explosive atmospheres, group II, category 2 (zones 1+21) and category 3 (zones 2+22) according to ATEX 94/9/EC. PED 97/23/EC

2 Pressure-Temperature ratings (to EN ) Nom. pressure Material Working pressures at temperatures in C PN RT 1 ) P 250 GH GP 240 GH+N ) RT = room temperature (--10 C to+50 C) Working pressures to DIN 2401 are also permitted. Installation Globe valves are installed in the line so that the medium enters the valve underneath the valve plug and flows out above it. They can also be installed in lines with alternating flow. If differential pressures as taken from the table above are exceeded, a pilot plug is required. In this case, the valve must be installed so that the pressure to be sealed off lies above the plug. The pilot plug acts as a bypass and can only fulfill its function if a back pressure builds up after the valve is open, so that the max. permissible differential pressure for shut-off does not exceed the value specified in the table above. Max. permissible differential pressure for shut-off (standard plug) DN p bar For the optimum selection of valves with throttling valve plug, detailed information about the operating mode should be provided. Endurance of bellows Working pressures in bar Number of load DN cycles at 20 C DN ZXLB ZXSB DN DN Forged steel DN Forged steel DN DN DN

3 Materials Part No. Name of parts Material Remarks DN Type ZXLB 100 Body P250GH DN Type ZXSB With stainless steel DN Type ZXLB hard-faced (1.4370) GP 240 GH DN Type ZXSB 131 Connection branch P235GH From DN 65 onwards 166 Yoke P250GH DN GP 240 GH DN 10-25, DN *) Stem (upper part) X20Cr13V Nitrided 350 *) Valve plug X 35 CrMo DN P250GH DN With hard-faced (1.4115) 411 *) Gasket CrNi-steel / graphite 440 *) Bellows set comprising: 165 Cover P250GH DN Stem (lower part) X20Cr13V Bellows X 6 CrNiMoTi Stuffing box part P250GH DN Intermediate ring X 6 CrNiMoTi Gland GS-C 25 N DN P250GH DN *) Packing Graphite 540 *) Yoke bush 11 SMn 30+C Nitrided 579 Locating lug G-X20Cr14G DN St 37 K DN Olive chromated Stud 21 CrMoV Olive chromated Hexagon nut 25 CrMo Socket head cap screw 961 Handwheel JL *) Recommended spare parts Variants Throttling valve plug Valve plug with Gylon gasket Pilot plug Locking device / lift stop Position switch closed Position switch open Leakage detection hole Position switch 3

4 Dimensions type ZXLB Face-to-face dimension -- EN 558-1/1 (previously: DIN 3202/F 1) ISO 5752/1 Flanges -- connection dimensions to EN 1092 (previously: DIN 2501) ISO 7005 raised face type B Other flange designs: -- e.g. grooved both ends type D, tongue type C, recessed (female face) type F, spigot (male face) type E to EN Other flange desings on request. Dimensions in mm Nom. Nom. Face-to-face Flange Bolt circle Number of Bolt hole Raised face Flange Centre-to-top Vertical clearance Handwheel Weight pressure bore dimension diam. bolt holes diameter thickness height open for removal PN DN l ød øk z øi ød 4 xf b h1 h4 ød approx. kg 25/ x x x x x x x x x x x x x x

5 Dimensions type ZXSB Face-to-face dimension -- EN 12982/64 (previously: DIN 3202-S2) Butt-weld ends -- DIN EN Fig. 2 Socket-weld ends -- DIN EN Different designs of butt-weld ends and welding groove forms are possible, but only within the dimensions A max. and B min. Butt weld ends to DIN 3239 type1 or socket weld ends to ASME B16.11/DIN 3239/2 possible. Socket weld end 7165:15 Butt-weld end Dimensions in mm Nom. Nom. Face-to-face Butt-weld ends Butt-weld ends to DIN EN Socket weld ends to DIN EN Centre-to-top Vertical clearance Hand- Weight pressure bore dimension not machined for removal wheel Associated height open approx. PN DN l øa max. øb min. ød 2 ød 3 pipe dimensions ød -- 0,5 øc +0.2 b min. h1 h4 ød kg 25/ x x x x x x x x x x x x x

6 Product Features - to our Customers Benefit Yoke Easy retrofitting of actuators without dismantling pressure-retaining components Robust yoke guarantees maximum reliability of mounted actuators Two-piece stem High safety in the packing area, due to burnished, non-rotating lower stem Minimized packing wear Low actuating forces Good service life Split bonnet Cost-effective replacement of bellows unit Conical stem Blow-out prevention Improved protection for staff and plant Reliable back seat Bonnet gasket seal Seal-weldable Inside and outside confined Seat Long service life Corrosion and wear-resistant Subject to technical modification without prior notice 7165:8 Tapered plug Self-cleaning due to angular seat Replaceable (from DN 32 onwards) / KSB Aktiengesellschaft Bahnhofplatz Pegnitz (Germany) Tel.: fax: valves@ksb.com