Double-Dump Airlock / Double-Dump Valves

In Comparison

Rotary valves have a gap between the blade ends and the housing that allow leakage. The constant scraping of material between the blade and housing causes even hardened surfaces to wear-out.

Rotary valve comparison

Don’t waste time and money programming what we’ve already programmed!

The Roto-Disc Cycle Controller (RDCC)™ allows you to easily control your double-dump assembly to get the throughput you want. Purpose-driven programs are available for temporal, gravimetric or volumetric control, all with manual override. Save programs for specific recipes/batch sizes and monitor the system through an intuitive LED screen.

Double-dump cycle timer

Double-dump cycle timer with field adjustable fill, dump & dwell timing


Roto-Disc® Airlock/ Double-Dump specifications

Roto-Disc® Airlock/Double-Dump valves are the solution for processing dry or slurry material into or out of pressure or vacuum environments. Intermediate accumulator chambers are designed for ledge-free flow of material from valve to valve. Cycle-timing and pressure equalization couplings are available for turn-key feeding solutions. These are the perfect replacement for leaky rotary-vane valves or other, flimsy double-dump valves.

Accumulator chambers can be sized to suit your processing needs.
Roto-Disc airlock / double-dump assembly with accumulator chamber
Feed Hoppers & Funnels are available per customer requirements. Assembly supports supplied through engineering partners
Roto-Disc airlock / double-dump assembly with accumulator chamber
Double-Dump Industrial Process Equipment Airlock Valve

Double-Dump Concept/Capabilities

Temporal, Gravimetric, Volumetric or Manual Feeding Solution

Roto-Disc’s design takes double-dump valves to the next level. Our double-dump assemblies can be used to process material into/out of differential pressure environments by timing, weight or volume, and even switch between any of these in just minutes. This is a revolutionary processing solution that can take the place of other feeding devices and make your process more efficient!

Roto-Disc Double-Dump Industrial Airlock Valve


Roto-Disc® Airlock/Double-Dump

Roto-Disc Airlock Double-Dump Diagram 1

Custom intermediate accumulator chambers to meet a specific volume and/or takeout space requirements are available.
Roto-Disc Airlock Double-Dump Diagram 2
Size Std/Opt Flg Sizes A thru K A.O.H. Weight Purge Coupling Size Typical Cycle Frequency (per minute) Accum Vol cu.in / cu.ft Typical Capacity, Ft³/Min
3” Sm see Roto-Disc diagram see Roto-Disc diagram 11.00” (279mm) 99 lbs 1/4” NPT 5 30 / .017 0.1
3” Md see Roto-Disc diagram see Roto-Disc diagram 23.13” (587mm) 117 lbs 1/4” NPT 4 172 / .10 0.4
3” Lg see Roto-Disc diagram see Roto-Disc diagram 22.75” (577mm) 122 lbs 1/4” NPT 4 432 / .25 1.0
4” Sm see Roto-Disc diagram see Roto-Disc diagram 11.50” (292mm) 180 lbs 1/4” NPT 4 68 / .04 0.2
4” Md see Roto-Disc diagram see Roto-Disc diagram 20.00” (508mm) 187 lbs 1/4” NPT 4 259 / .15 0.6
4” Lg see Roto-Disc diagram see Roto-Disc diagram 26.25” (667mm) 200 lbs 1/4” NPT 3 872 / .50 1.5
6” Sm see Roto-Disc diagram see Roto-Disc diagram 14.00” (355mm) 256 lbs 1/4” NPT 4 117 / .068 0.3
6” Md see Roto-Disc diagram see Roto-Disc diagram 24.75” (628mm) 271 lbs 1/4” NPT 3 579 / .33 1.0
6” Lg see Roto-Disc diagram see Roto-Disc diagram 31.38” (797mm) 278 lbs 1/4” NPT 3 1732 / 1.0 3.0
8” Sm see Roto-Disc diagram see Roto-Disc diagram 16.75” (425mm) 353 lbs 3/8” NPT 3 230 / .133 0.4
8” Md see Roto-Disc diagram see Roto-Disc diagram 31.87” (809mm) 377 lbs 3/8” NPT 3 1295 / .75 2.3
8” Lg see Roto-Disc diagram see Roto-Disc diagram 31.87” (809mm) 402 lbs 3/8” NPT 2 3462 / 2.0 4
10” Sm see Roto-Disc diagram see Roto-Disc diagram 21.25” (539mm) 514 lbs 3/8” NPT 3 405 / .234 0.7
10” Md see Roto-Disc diagram see Roto-Disc diagram 42.50” (1079mm) 553 lbs 3/8” NPT 3 2598 / 1.50 4.5
10” Lg see Roto-Disc diagram see Roto-Disc diagram 45.05” (1144mm) 582 lbs 3/8” NPT 2 6048 / 3.50 7.0
12” Sm see Roto-Disc diagram see Roto-Disc diagram 25.25” (641mm) 1092 lbs 3/8” NPT 3 726 / .40 1.2
12” Md see Roto-Disc diagram see Roto-Disc diagram 47.88” (1216mm) 1186 lbs 3/8” NPT 2.5 4,319 / 2.50 6.3
12” Lg see Roto-Disc diagram see Roto-Disc diagram 56.50” (1435mm) 1233 lbs 3/8” NPT 2.5 10,375 / 6.0 15.0
14” Sm see Roto-Disc diagram see Roto-Disc diagram 33.00” (838mm) 1141 lbs 3/8” NPT 2 1,968/1.1 2.2
14” Md see Roto-Disc diagram see Roto-Disc diagram 51.75” (1315mm) 1217 lbs 3/8” NPT 2 6,932/4.0 8.0
14” Lg see Roto-Disc diagram see Roto-Disc diagram 69.88” (1775mm) 1271 lbs 3/8” NPT 1.5 20,762/12.0 18.0
16” Sm see Roto-Disc diagram see Roto-Disc diagram 30.75” (781mm) 1200 lbs 3/8” NPT 2 2546/1.5 3.0
16” Md see Roto-Disc diagram see Roto-Disc diagram 45.75” (1162mm) 1292 lbs 3/8” NPT 2 6947/4.0 8.0
16” Lg see Roto-Disc diagram see Roto-Disc diagram 65.25” (1657mm) 1321 lbs 3/8” NPT 1.5 20,730/12.0 18.0
18” Sm see Roto-Disc diagram see Roto-Disc diagram 40.75” (1035mm) 1577 lbs 1/2” NPT 2 3749 / 2.2 4.4
18” Md see Roto-Disc diagram see Roto-Disc diagram 61.00” (1549mm) 1834 lbs 1/2” NPT 1.5 12,088 / 7.0 10.5
18” Lg see Roto-Disc diagram see Roto-Disc diagram 78.25” (1987mm) 2046 lbs 1/2” NPT 1.25 34,555 / 20.0 25.0

 

* Dimensions based on standard flanges and standard control package. Dimensions vary with flange options and other control packages.
** Maximum recommended torque based on standard shaft material and will vary with other materials.



Roto-Flate® Airlock/Double-Dump

Roto-Disc Airlock Double-Dump Diagram 2

Custom intermediate accumulator chambers to meet a specific volume and/or takeout space requirements are available.
Roto-Disc Airlock Double-Dump Diagram 2
Size Std/Opt Flg Sizes A thru K A.O.H. Weight Purge Coupling Size Typical Cycle Frequency (per minute) Accum Vol cu.in / cu.ft Typical Capacity, Ft³/Min
3” Sm see Roto-Flate diagram see Roto-Flate diagram 11.00” (279mm) 99 lbs 1/4” NPT 5 50 / .029 0.1
3” Md see Roto-Flate diagram see Roto-Flate diagram 23.13” (587mm) 117 lbs 1/4” NPT 4 173 / .10 0.4
3” Lg see Roto-Flate diagram see Roto-Flate diagram 22.75” (577mm) 122 lbs 1/4” NPT 4 432 / .25 1.0
4” Sm see Roto-Flate diagram see Roto-Flate diagram 11.50” (292mm) 180 lbs 1/4” NPT 4 105 / .06 0.2
4” Md see Roto-Flate diagram see Roto-Flate diagram 20.00” (508mm) 187 lbs 1/4” NPT 4 262 / .15 0.6
4” Lg see Roto-Flate diagram see Roto-Flate diagram 26.25” (667mm) 200 lbs 1/4” NPT 3 870 / .50 1.5
6” Sm see Roto-Flate diagram see Roto-Flate diagram 14.00” (355mm) 256 lbs 1/4” NPT 4 207 / .12 0.3
6” Md see Roto-Flate diagram see Roto-Flate diagram 24.75” (628mm) 271 lbs 1/4” NPT 3 572 / .33 1.0
6” Lg see Roto-Flate diagram see Roto-Flate diagram 31.38” (797mm) 278 lbs 1/4” NPT 3 1792 / 1.0 3.0
8” Sm see Roto-Flate diagram see Roto-Flate diagram 16.75” (425mm) 353 lbs 3/8” NPT 3 346 / .20 0.6
8” Md see Roto-Flate diagram see Roto-Flate diagram 31.87” (809mm) 377 lbs 3/8” NPT 3 1297 / .75 1.5
8” Lg see Roto-Flate diagram see Roto-Flate diagram 31.87” (809mm) 402 lbs 3/8” NPT 2 3572 / 2.0 4
10” Sm see Roto-Flate diagram see Roto-Flate diagram 21.25” (539mm) 514 lbs 3/8” NPT 3 660 / .38 1.1
10” Md see Roto-Flate diagram see Roto-Flate diagram 42.50” (1079mm) 553 lbs 3/8” NPT 3 2598 / 1.50 3.0
10” Lg see Roto-Flate diagram see Roto-Flate diagram 45.05” (1144mm) 582 lbs 3/8” NPT 2 6056 / 3.50 7.0
12” Sm see Roto-Flate diagram see Roto-Flate diagram 25.25” (641mm) 1092 lbs 3/8” NPT 3 1130 / .65 1.6
12” Md see Roto-Flate diagram see Roto-Flate diagram 47.88” (1216mm) 1186 lbs 3/8” NPT 2.5 4323 / 2.50 5.0
12” Lg see Roto-Flate diagram see Roto-Flate diagram 56.50” (1435mm) 1233 lbs 3/8” NPT 2.5 10,388 / 6.0 12.0
14” Sm see Roto-Flate diagram see Roto-Flate diagram 33.00” (838mm) 1141 lbs 3/8” NPT 2 3322 / 1.92 3.8
14” Md see Roto-Flate diagram see Roto-Flate diagram 51.75” (1315mm) 1217 lbs 3/8” NPT 2 6921 / 4.0 7.0
14” Lg see Roto-Flate diagram see Roto-Flate diagram 69.88” (1775mm) 1271 lbs 3/8” NPT 1.5 20,784 / 12.0 18.0
16” Sm see Roto-Flate diagram see Roto-Flate diagram 30.75” (781mm) 1200 lbs 3/8” NPT 2 3955 / 2.3 4.6
16” Md see Roto-Flate diagram see Roto-Flate diagram 45.75” (1162mm) 1292 lbs 3/8” NPT 2 6922/4.0 7.0
16” Lg see Roto-Flate diagram see Roto-Flate diagram 65.25” (1657mm) 1321 lbs 3/8” NPT 1.5 21,005/12.0 18.0
18” Sm see Roto-Flate diagram see Roto-Flate diagram 40.75” (1035mm) 1577 lbs 1/2” NPT 2 5996 / 3.5 5.3
18” Md see Roto-Flate diagram see Roto-Flate diagram 61.00” (1549mm) 1834 lbs 1/2” NPT 1.5 12,113 / 7.0 8.8
18” Lg see Roto-Flate diagram see Roto-Flate diagram 78.25” (1987mm) 2046 lbs 1/2” NPT 1.25 34,734 / 20.0 20.0

 



Roto-Clean® Airlock/Double-Dump

Roto-Clean Airlock Double-Dump Diagram 2

Custom intermediate accumulator chambers to meet a specific volume and/or takeout space requirements are available.
Roto-Clean Airlock Double-Dump Diagram 2
Size Std/Opt Flg Sizes A thru K A.O.H. Weight Purge Coupling Size Typical Cycle Frequency (per minute) Accum Vol cu.in / cu.ft Typical Capacity, Ft³/Min
3” Sm see Roto-Clean diagram see Roto-Clean diagram  17.36″ (441mm)  64 lbs 1/4” NPT 5  31 / .018 0.09
3” Md see Roto-Clean diagram see Roto-Clean diagram  21.49″ (546mm)  66 lbs 1/4” NPT 4  57 / .033 0.13
4” Sm see Roto-Clean diagram see Roto-Clean diagram  17.08″ (434mm)  72 lbs 1/4” NPT 4  52 / .03 0.12
4” Md see Roto-Clean diagram see Roto-Clean diagram  21.21″ (539mm)  75 lbs 1/4” NPT 4  99 / .06 0.24
6” Sm see Roto-Clean diagram see Roto-Clean diagram  19.88″ (505mm)  134 lbs 1/4” NPT 4  110 / .064 0.26
6” Md see Roto-Clean diagram see Roto-Clean diagram  26.00″ (660mm)  137 lbs 1/4” NPT 3  267 / .16 0.48
8” Sm see Roto-Clean diagram see Roto-Clean diagram  26.05″ (662mm)  244 lbs 1/4” NPT 3  131 / .076 0.29
8” Md see Roto-Clean diagram see Roto-Clean diagram  32.18″ (817mm)  248 lbs 1/4” NPT 3  416 / .24 0.72
10” Sm see Roto-Clean diagram see Roto-Clean diagram  27.45″ (697mm)  300 lbs 1/4” NPT 3  421 / .243 0.73
10” Md see Roto-Clean diagram see Roto-Clean diagram  35.58″ (904mm)  306 lbs 1/4” NPT 2  915 / .529 1.09