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Nordfab Ducting for Process Ventilation & Dust Collection

Rotary Valves

Rotary valves are used as an airlock feeder valve at the bottom of pressurized vessels (both negative and positive) such as dust collectors, cyclones, and hoppers. Rotary valves are used for wood dust & shavings, paper, animal feed & cereals, plastics and many other free flowing products.

They are fabricated in 3 mm black plate and painted and have a rotational speed of 20 rpm. Rotary valves have 6 blades with rubber tips and have a bearing at one end and a gear box & motor mounted directly on the other end. The approximate capacity of a rotary valve is calculated at 50% full when used under dust collectors, cyclones etc. When used as a rotary feeder under hoppers, the rate can be increased to 80-90 % of total capacity.

rotary valves   Rotary valves

 

Rotary Valves   A mm B mm  C mm  D mm  E mm  F mm   G mm H mm  J mm  K mm  Output @ 50% 
 R.V.250  250 350  300  2 x 150  11   300 2 x 150  460  490  350  20 m3/hr 
 R.V.500  500 350  300  1 x 200 (+) 2 x 175  11   300 2 x 150 460 490  350   40 m3/hr
 R.V.1000  925  1025  975  5 x 165 11  300  4 x 75 460 490  350   60 m3/hr
 R.V.W5000  500  590  560  4 x 140 11  300  4 x 75 460 490  350   90 m3/hr

 

Cast Iron Rotary Valves

Nordfab’s cast iron rotary valve has internally machined surfaces that permit free movement of the impeller whilst maintaining an airtight seal. Operating Principle Product is fed through the square inlet opening and is moved through an airlock by a rotating impeller, and discharged on the opposite side. Construction cast iron, with machined internal surface. 

cast iron   cast iron

Model  Volume per round
(L/round) 		 Motor power
(kW) 		 Valve speed
(rpm) 		 Working temp
(degree C) 		  Dimensions (mm)
 A B  C   A1 B1     C1     H  E  Flange hole diameter 
 RV2  2  0.55  24  <300 240  200  150   240 x 240  200   150 x 150   240  ~680  9
 RV4  4  0.55  24  <300  280  240  180  280 x 280  230  180 x 180   280  720  11
 RV6  6  0.75  24  <300  300  260  200  300 x 300  250  200 x 200   300  ~740  11
 RV8  8  0.75  24  <300  320  280  220  320 x 320  270  220 x 220   320  ~760  11
 RV10  10  1.1  24  <300  340  300  240  340 x 340  290  240 x 240   340  ~800  11
 RV12  12  1.1  24  <300  360  320  260  360 x 360  310  260 x 260   360  ~820  13
 RV14  14  1.1  24  <300  381  340  280  380 x 380  330  280 x 280   380  ~1020  13
 RV16  16  1.1  24  <300  400  360  300  400 x 400  350  300 x 300   400  ~1040  17
 RV18  18  1.1  24  <300  420  380  320  420 x 420  370  320 x 320   420  ~1080  17
 RV20  20  1.1  24  <300  440  400  340  440 x 440  390  340 x 340   440  ~1100  17
 RV26  26  2.2  24  <300  500  460  400  500 x 500  450  400 x 400   520  ~1200  17
 RV30  30  2.2  24  <300  540  500  440  540 x 540  490  440 x 440   560  ~1240  17
 RV36  36  3  24  <300  640  590  500  640 x 640  590  500 x 500   680  ~1280  20
 RV40  40  4  24  <300  680  630  540  680 x 680  630  540 x 540   720  ~1380  20
 RV46  46  4  24  <300  820  740  600  820 x 820  740  600 x 600   840  ~1600  22
 RV56  56  5.5  24  <300  940  840  700  940 x 940  840  700 x 700   1000  ~1850  22
 RV66  66  7.5  24  <300  1060  940  800  1060 x 1060  940  800 x 800   1200  ~2100  22
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