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  6. Heavy Duty Slurry Valves Type SLV and SLF

Heavy Duty Slurry Valves Type SLV and SLF

Stafsjö’s knife gate valves SLV and SLF are particularly suitable for abrasive and demanding slurry where operation reliability and low life cycle cost are emphasized. The SLV is a lugged version while the SLF is fully flanged and especially suitable on old non-centred pipes or low pressure applications.

When the valves are in opened position, the seats form a tight extension of the pipe line and no metal parts are in contact with the media. When the valve closes the two seats are displaced axially forming a seal with the gate until it forms a complete closure – 100% tight in any pressure direction.

The SLV and SLF comes with a coated valve body in nodular iron with integrated purge ports in the lower end to be utilized if a bottom cover is assembled on the valve. The unique seats are available in low friction special EPDM, natural rubber or Viton. These seal against a gate specially machined and grinded to reduce the friction when the valve is operated. The gate can also be hard chromed to give a really hard and wear resistant surface.

The SLV valve is available from DN 50/2″ up to DN 900/36″ and the SLF from DN 80 up to DN 400 (3″ to 16″). Larger sizes on request. Further information on the valves is available in the product data sheets.

Other slurry valves are the high pressure versions SLH and SLX which can be supplied for pressures up to 50 bar (720 psi).

Print Product Data Sheet

Main Dimensions – SLV

Dimensions (mm)
DN A7) A8) B9) B10) B11) C D E F G H J K L Weight12)
50 50 55 56 54 66 94 80 315 86 614 609 124 753 371 13
65 65 71 56 54 66 107 80 315 93 624 619 139 763 381 14
80 80 83 59 57 69 126 80 315 94 712 729 180 801 419 18
100 100 107 59 57 73 158 80 315 103 748 789 206 836 454 25
125 125 132 66 64 80 186 145 315 124 868 899 237 971 533 31
150 150 159 66 64 80 213 145 315 136 878 909 259 981 543 35
200 200 207 78 76 92 269 145 315 169 1031 1119 312 1079 641 44
250 250 260 78 76 96 322 145 400 204 1162 1251 388 1261 723 63
300 300 310 84 82 102 372 175 520 236 1400 1485 457 1409 861 98
350 350 350 84 82 102 434 200 520 266 1510 1610 516 1569 916 136
400 400 400 97 95 115 483 200 635 300 1650 1737 575 1701 998 176
450 450 450 97 95 115 533 300 – 330 – 1935 627 1942 1129 215
500 500 504 123 121 141 589 300 – 364 – 2019 680 2000 1187 270
600 600 600 123 121 141 690 300 – 425 – 2324 816 2290 1377 340
700 660 700 174 170 190 798 310 – 482 – – 920 2551 1538 500
800 750 800 194 190 210 905 310 – 544 – – 1040 2817 1704 660
900 850 900 225 220 240 1005 500 – 594 – – 1154 3086 1858 900

Main Dimensions – SLF

Dimensions (mm)
DN A1 A2 B1 B2 B3 C D E F G H J K L
80 80 75 151 146 158 116 80 315 100 712 749 200 801 419
100 100 93 151 146 162 143 80 315 115 748 809 230 836 454
125 124 120 151 146 162 172 145 315 127 868 938 254 971 533
150 148 145 154 149 165 197 145 315 143 878 948 285 981 543
200 199 190 161 156 172 253 145 315 172 1031 1147 343 1079 641
250 249 240 226 221 241 303 145 400 204 1162 1279 406 1261 723
300 293 283 247 242 262 356 175 520 242 1400 1609 483 1409 861
350 337 327 256 251 271 408 200 520 268 1510 1714 535 1569 916
400 375 365 278 273 293 464 200 635 300 1650 1908 590 1701 998

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