Rotary Air Lock

Rotary Air Lock

Rotary Air Lock

The prime function of a rotary valve is to regulate the flow from one chamber to another while maintaining a good airlock condition. The product is mainly in dry powder or granular form. In the dust filtration field good airlocks are essential on cyclone and bag filter applications in order that the manufacturer’s quoted high dust collection efficiencies can be maintained. Airlocks are also important in the pneumatic conveying industry, where product is regulated into a high-pressure conveying line while minimising air leakage. All RMB Knovatech standard valves are precision machined for close tolerances and minimal eccentricities. Pressure differentials up to 15 bar and temperatures up to 400°C.

Standard Feature

  • 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.
  • Labyrinth/Packing gland type seals.
  • Maximizing valve speed to 25 rpm -prolonging life, ensuring good throughput.
  • Precision machining of components

Construction / Technical Specification

Body Fabricated-MS/SS
Rotor Fabricated Closed and Open, MS/SS
Side Plates Fabricated MS/SS
Gear Box Heliworm / Helibevel / Helical Gear
Drive Type Direct/Chain
Drive Bonfiglioli Standard
Rotor Type Fabricated Closed or open
Rotor Tips Flexible Tips/Wear Tips
Sensor Proximity Sensor
Seals Labyrinth Seal
Bearing Cartridge Type
Bearing Make SKF/NTN/ZKL eqvt.
Shaft CS1030
Opening Size 200 to 750
Temperature UP to 400 Degree C
Differential Pressure 15 Bar
Capacity Range Up to 350 Cu M
Surface Treatment Grit Blasting
Painting Standard 50 µm Epoxy Grey
Primer and 50 µm PU
Blue paint RAL 5015

Selection

The chart below gives theoretical and estimated throughputs on the basis of rotor speed. The theoretical figure is determined by the swept volume of the valve and is calculated on a pocket fillage of 100%. In practice this is seldom achieved as density, product characteristics, pressure differential, feeding methods, all affect the valve throughput efficiency. Factors other than throughput can sometimes determine valve selection. This is particularly true on cyclone and filter applications where the valve inlet size to prevent bridging can become the governing factor,always with the proviso that the potential valve discharge rate exceeds the collecting rate.

Model Opening (MM) Power Capacity Chart In CU M PER HR considering 100%filling
RPM 26 24 22 20 18 16
KH750 750x750 7.5 - - - 420 360 300
KH750 750x750 7.5 - - - 420 360 300
KH600 600x600 5.5 - - - 280 240 200
KH500 500x500 4 - - 120 105 90 75
KH400 400x400 3.0 - - 80 70 60 50
KH300 300x300 1.5 50 45 40 35 30 25
KH200 200x200 0.75 20 18 16 14 12 10

Dimension Direct Drive

Name KH200 KH300 KH400 KH500 KH600 KH750
A 300 430 530 630 760 930
B 200 300 400 500 600 750
C 517 598 894 1028 1068 1309
D 367 383 629 711 940 1050
E 150 215 265 315 380 465
F 85 94 94 114 100 108
G 255 376 470 570 700 864
H 14 15 15 15 18 18
I 12 16 20 20 28 32
J 574 718 932 1089 1182 1376
K 190 250 325 375 457 465
L 384 468 607 714 725 911
M 330 470 620 760 900 1120
N 165 235 310 380 450 560
O 165 235 310 380 450 560
Net Weight 84 183 400 615 1058 1750
Gross Weight 105 215 440 750 1120 1820
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