The basic use of the rotary airlock feeder is as an airlock transition point, sealing pressurized systems against loss of air or gas while maintaining a flow of material between components with different pressure and suitable for air lock applications ranging from gravity discharge of filters, rotary valves, cyclone dust collectors, and rotary airlock storage devices to precision feeders for dilute phase and continuous dense phase pneumatic convey systems.
Drive systems available: Chain driven & Direct Driven
ROTARY AIRLOCK VALVE
| S.N. | Rav Size | STD design | Quick release |
|---|---|---|---|
| 1 | RAV-150 | Yes | Yes |
| 2 | RAV-200 | Yes | Yes |
| 3 | RAV-250 | Yes | Yes |
| 4 | RAV-300 | Yes | Yes |
| 5 | RAV-350 | Yes | Yes |
| 6 | RAV-400 | Yes | Yes |
| 7 | RAV-450 | Yes | Yes |
| 8 | RAV-500 | Yes | Yes |
| 9 | RAV-550 | Yes | Yes |
| 10 | RAV-600 | Yes | Yes |
| 11 | RAV-700 | Yes | - |
DOUBLE FLAP VALVE
Double dump valves have two trap-door flap plates which open and close on an alternating cycle. The top gate opens to allow collected material to drop through onto the bottom gate. The top gate then re-closes to prevent air leakage above the valve. The bottom gate then opens to allow material to pass completely through the valve. The bottom gate then re-closes to prevent air leakage below the valve. This cycle is continuously repeated in order to maintain a steady discharge of material from the valve, while maintaining a positive seal on the system.
GATE VALVE
A gate valve, also known as a sluice valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar, so gate valves are often used when a straight line flow of fluid and minimum restriction is desired.
The gate faces can form a wedge shape or they can be parallel. Gate valves are primarily used to permit or prevent the flow of liquids, but typical gate valves shouldn't be used for regulating flow, unless they are specifically designed for that purpose. On opening the gate valve, the flow path is enlarged in a highly nonlinear manner with respect to percent of opening.
This means that flow rate does not change evenly with stem travel. Also, a partially open gate disk tends to vibrate from the fluid flow. Most of the flow change occurs near shutoff with a relatively high fluid velocity causing disk and seat wear and eventual leakage if used to regulate flow. Typical gate valves are designed to be fully opened or closed.
Ecomak offers: Knife gate valve and Slide gate valve.
Screw Conveyors
Screw Conveyors consist of a trough or tube containing either a spiral blade coiled around a shaft, driven at one end and held at the other. The rate of volume transfer is proportional to the rotation rate of the shaft. In industrial control applications the device is often used as a variable rate feeder by varying the rotation rate of the shaft to deliver a measured rate or quantity of material into a process. Screw conveyors can be operated with the flow of material inclined upward. This is a very economical method of elevating and conveying used by industry.
Pug Mills
A pugmill or pug mill is a machine in which clay or other materials are mixed into a plastic state or a similar machine for the trituration of ore. A pugmill may be a fast continuous mixer. A continuous pugmill can achieve a thoroughly mixed, homogeneous mixture in a few seconds. Mixing materials at optimum moisture content requires the forced mixing action of the pugmill paddles, while soupy materials might be mixed in a drum mixer. A typical pugmill consists of a horizontal boxlike chamber with a top inlet and a bottom discharge at the other end, 2 shafts with opposing paddles, and a drive assembly. Some of the factors affecting mixing and residence time are the number and the size of the paddles, paddle swing arc, overlap of left and right swing arc, size of mixing chamber, length of pugmill floor, and material being mixed.
Scrappers
Ecomak's rotary scraper rod is capable of reaching the required process velocities providing high levels of shear and mixing at the heat transfer surface.
This makes it particularly suitable for challenging heat transfer applications, such as those where the product has the potential to crystallize during processing or where aeration is required.
