Rotary Valve

Key Features

  • Maximum number of blades in contact with body at one time without affecting throughput.
  • Good throat opening at valve entry allowing high pocket filling efficiency.
  • Minimum clearance at rotor tips and sides with body.
  • Robust body adequately stiffened to prevent distortion.
  • Heavy shaft diameters minimising deflection.
  • Outboard bearings for non-contamination.
  • Packing gland type seals.
  • Maximising valve speed to 25 rpm -prolonging life, ensuring good throughput.
  • Precision machining of components.

The prime function of a Rotary Valve is to regulate the flow of dust, powder and granular products from one chamber to another whilst maintaining a good airlock.

In the dust filtration field a good airlock is essential on cyclone and bag filter applications in order that the manufacturers quoted high dust collection efficiencies can be maintained. Airlocks are also important in the pneumatic conveying industry, where product is regulated into a pressure or vacuum conveying line while minimising air leakage.

With Rotolok there are no double standards, all our standard valves are precision machined for close tolerances and minimal eccentricities.

Pressure differentials to 20psi and temperatures to 400°C (752°F) are considered the norm and extreme pressures and temperatures can be accommodated with special designs. If your application requires such considerations contact the Rotolok Engineering team.

Rotolok Rotary Valves and Airlocks have ATEX Covered

Following successful completion of the rigorous testing process Rotolok can offer a complete range of Rotary Valves certified as suitable for use as an explosion barrier to a maximum of 10bar and for explosion isolation for St1 and St2 dusts.

Due to careful design of the internal components the overall dimensions are very similar to our standard range of valves and we can offer a selection of optional features such as purged shaft seals, scalloped rotor pockets and staggered rotor pockets without the throughput being greatly reduced or the barrier efficiency being affected.

  • Bodies

    Cast Iron, Stainless Steel or Aluminium precision bored.

  • End Covers

    Cast Iron, Stainless Steel or Aluminium spigot located inbody for concentricity.

  • Rotor

    Fabricated Mild or Stainless Steel.

  • Bearings

    Sealed-for-life ball type rigged outboard.

  • Shaft Seal

    Gland type with PTFE packing.

  • Drive

    TEFC geared motor unit side wall mounted to valve body and complete with taper lock sprockets and chain drive all in an enclosed guard.

  • Quick Release Rotors
  • Direct Coupled Drives
  • Air Purge Glands
  • Body Vents
  • Vent Boxes
  • Dropout Boxes
  • V.S. Drives
  • Speed Switches
  • Flameproof Motors
  • Shear Plate Deflectors
  • Electroless NickelPlating
  • Hard Chrome Internals etc.

All dimensions are in mm unless otherwise stated

Size A A1 B B1 C D E F G H J K L M N P Q R S T V W X kW
125 127 127 225 225 12 98.5 197 195 159 232 406 220 195 28 143 8 14 8 7 On Application 0.37
150 152 152 152 250 12 140 280 180 174 247 406 234 195 28 143 12 12 8 7 3 70 3 70 0.37
200 203 203 300 300 15 165 330 155 199 272 406 259 219 18 143 12 12 8 7 3 90 3 90 0.37
250 254 254 370 370 15 203 388 200 229 322 478 290 249 35 155 12 18 10 8 3 108 3 128 0.75
300 305 305 440 440 19 240 465 170 260 353 478 320 279 35 195 12 18 10 8 3 128 3 128 0.75
350 356 356 470 470 19 257 514 160 270 363 512 329 289 35 220 12 12 10 8 3 140 3 140 0.75
400 406 406 550 550 20 300 580 115 332 425 626 403 352 50 235 12 18 14 9 3 165 3 165 1.1
450 457 457 610 610 20 322 630 85 357 450 626 428 377 50 285 12 18 14 9 3 187 3 187 1.1
500 508 508 650 650 20 340 670 120 382 475 700 453 402 50 289 16 18 14 9 4 148 4 148 1.5
600 610 610 750 750 20 380 750 115 432 525 700 503 452 50 335 16 18 14 9 4 173 4 173 2.2
750 750 750 1000 1000 25 500 1000 60 503 643 910 605 522 70 450 24 18 20 12 6 149 6 149 2.2
915 915 915 1165 1165 25 600 1200 -25 605 748 1000 707 625 70 540 24 22 20 12 6 175 6 175 4.0

All dimensions are in mm unless otherwise stated

Size A B C D E F G H J K L M N O P Q R S kW
50 51 152 10 60 120 * 74 On Application
85 85 190 10 80 80 * 117 On Application
125 127 240 12 108 108 200 159 232 406 219 178 28 143 8 18 200 8 7 0.37
150 154 285 12 140 270 180 174 247 406 234 194 28 143 8 22 241 8 7 0.37
200 203 320 13 160 310 155 199 272 406 259 219 28 143 8 18 280 8 7 0.37
250 254 370 15 200 380 200 229 322 478 289 248 35 155 8 18 320 10 8 0.75
300 305 440 19 240 465 170 260 353 478 320 279 35 195 12 22 395 10 8 0.75
350 356 533 19 270 520 160 270 363 512 332 289 35 220 12 22 445 10 8 0.75
400 406 540 20 300 580 110 332 425 626 403 352 50 235 12 22 495 14 9 1.1
450 457 635 20 320 625 80 357 450 626 419 377 50 285 16 32 578 14 9 1.1
500 508 700 20 340 670 115 382 475 700 453 402 50 289 20 32 635 14 9 1.5
600 610 813 20 385 760 115 432 525 700 503 452 50 335 20 35 749 14 9 2.2
750 762 984 25 500 1000 45 503 646 910 605 522 70 450 28 35 914 20 12 2.2

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