Si-110 EN
1 / 8ページ

Datasheet Ball segment valve Si-110 EN Edition: 2012-07 Type KVTW/KVXW Wafer design Type KVTF/KVXF Flanged design Nominal pressure PN 25/20/16/10 Nominal size DN 80 - 500 Material Stainless steel and • Control-valve shut-off • High capacity • One-piece shaft gives a torque transmission free of backlash • Excellent tightness irrespective of differential pressure • Easy maintenance Option The SOMAS ball segment valve type KVTW with a centrically mounted shaft, and KVXW with an eccentrically mounted shaft are of wafer design. Type KVTF is a flanged version with centrically mounted shaft while KVXF is flanged and eccentric design. The valve body is in one piece. Shaft device is also in one piece for torque trans­ ission m free of backlash. The spring-loaded seat is available in three alternative materials (PTFE, PTFE 53 and HiCo). The valves can be used for control, as well as for shut-off applications on practi­ ally c every type of media within a wide temperature range. Choose KVT for liquids, media containing impurities etc. For dry and clean media choose KVX. In the KVX-valve the ball segment is eccentrically mounted and rotates out from the seat when the valve is opened. This reduces the wear on seat and segment. Low noise trim is available as an option. The designation “LN” indicates that the ball seg­ ent is equipped with a network of bars that are used to split up the pressure drop m across the valve. This results in less pressure recovery, thereby reducing the noise and potential damage due to cavitation. Note! Capacity factors will be reduced for valves with LN-trim. • KVM-ballwith segment V-groove for high fibre concentrations • LN Noise) (Low Ball segment with low noise trim for high ∆P Ball segment with V-groove is available for use at high fibre concentrations. The V-groove design prevents dewatering at small opening angles. The SOMAS valves are delivered ready for installation and operation. The valve assem­ blies are delivered factory tested as complete units with actuators, positioners and accessories.

Si-110 EN Edition: 2012-07 Capacity factor Kv and Resistance factor ξ for ball segment valve type KVTW/KVXW DN 80 100 150 200 250 10° 15 23 43 66 97 20° 39 58 109 167 245 30° 67 101 189 288 425 40° 102 154 288 439 646 Opening angle 50° 60° 138 184 208 276 390 519 594 790 875 1162 70° 231 348 652 994 1463 80° 295 444 817 1268 1866 90° 340 510 925 1450 2150 ξ 90° 0,57 0,62 0,44 0,45 0,44 Capacity factor Kv and Resistance factor ξ for ball segment valve type KVTF/KVXF DN 80 100 125 150 200 250 300 350 400 500 10° 15 23 43 60 100 155 219 308 385 607 20° 39 58 109 153 253 390 552 780 878 1539...

Edition: 2012-07 Si-110 EN Selection table KVTW/KVXW Double acting Valve DN 80 100 150 200 250 Shaft dia. (mm) 20 20 25 30 35 5.5 bar A21 A21 A22 A31 A31 4 bar A22 A22 A23 A24 A32 KVTF/KVXF Double acting Valve DN 80 100 125 150 200 250 300 350 400 500 Shaft dia. (mm) 20 20 25 30 35 40 50 60 70 80 5.5 bar A21 A21 A22 A31 A31 A32 A41 A41 A42 A42 4 bar A22 A22 A23 A31 A32 A32 A41 A42 A42 A43 Pneumatic actuators Spring return Spring to close Spring to open 5.5 bar 4 bar 5.5 bar 4 bar A23-SC A23-SC A23-SO A23-SOL A23-SC A23-SC A23-SO A23-SOL A24-SC A24-SC A24-SO A24-SOL A33-SC A33-SC A33-SO...