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Reliable prevention of medium back flow by automatic mechanical closing of the Non-return valve.

The disc opens automatically, if the medium flows in the direction indicated by the arrow on the valve body.

No. 9831 Design features:
  • reduced weight
  • simple cleaning
  • fully corrosion free
  • optimised velocity
  • simple maintenance
  • PN 25 (on request)
  • opening pressure min. 0,03 bar
  • closing pressure min. 0,5 bar (tight)
  • No. 9830 Design features
  • with lever and counterweight (on request)
  • opening pressure min. 0,03 bar
  • closing pressure min. 0,1 bar (tight) without handwheel and extension spindle
    (only suitable for manual actuation)
  • Hawle Check Valve DN 40 - 300 Technical Specifications

    DN PN L H D d 1 k d 2 f b Bolts Kv m³/h Weight kg
    40 16 180 119 150 88 110 19 3 18 4 x M 16 60 9,0
    50 16 200 77 165 102 125 19 3 19 4 x M 16 170 9,5
    65 16 240 141 185 122 145 19 3 20 4 x M 16 163 15,0
    80 16 260 95 200 138 160 19 3 19 8 x M 16 366 14,5
    100 16 300 113 220 158 180 19 3 19 8 x M 16 698 22,5
    125 16 350 199 250 188 210 19 3 26 8 x M 16 588 46,0
    150 16 400 155 285 212 240 23 3 19 8 x M 20 1489 45,0
    200 10 500 187 340 268 295 23 3 20 8 x M 20 1388 82,0
    16 12 x M 20
    250 10 600 337 405 320 350 23 3 32 12 x M 20   180,0
    16 355 27 12 x M 24
    300 10 700 374 460 378 400 23 4 32 12 x M 20   270,0
    16 410 27 12 x M 24