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).

Main Dimensions – SLV

Dimensions (mm)
DNA7)A8)B9)B10)B11)CDEFGHJKLWeight12)
50505556546694803158661460912475337113
656571565466107803159362461913976338114
808083595769126803159471272918080141918
1001001075957731588031510374878920683645425
12512513266648018614531512486889923797153331
15015015966648021314531513687890925998154335
20020020778769226914531516910311119312107964144
25025026078769632214540020411621251388126172363
300300310848210237217552023614001485457140986198
3503503508482102434200520266151016105161569916136
4004004009795115483200635300165017375751701998176
4504504509795115533300330193562719421129215
500500504123121141589300364201968020001187270
600600600123121141690300425232481622901377340
70066070017417019079831048292025511538500
800750800194190210905310544104028171704660
9008509002252202401005500594115430861858900

Main Dimensions – SLF

Dimensions (mm)
DNA1A2B1B2B3CDEFGHJKL
80807515114615811680315100712749200801419
1001009315114616214380315115748809230836454
125124120151146162172145315127868938254971533
150148145154149165197145315143878948285981543
200199190161156172253145315172103111473431079641
250249240226221241303145400204116212794061261723
300293283247242262356175520242140016094831409861
350337327256251271408200520268151017145351569916
400375365278273293464200635300165019085901701998

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