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Pneumatic Conveying Eductors for Handling Dry Solids

Principle of Operation of Pneumatic Conveying Eductors for Handling Dry Solids

Fig. 217P and Fig. 218P Pneumatic Conveying Eductors for Handling Dry Solids employ motive air from a compressed air source or a blower to entrain and transport solids. The motive air is expanded across the nozzle creating a vacuum in the suction chamber drawing the product into the eductor. The motive air and entrained solids are carried through the diffuser section of the eductor and discharged into the conveying system.

Figure 217P and 218P Pneumatic Conveying Eductor with threaded NPT connections

Pneumatic Conveying Eductors for Handling Dry Solids eliminate the high maintenance costs associated with failures, shutdowns, and service and eliminate maintenance and safety problems associated with rotary airlocks as well as fines blowback, severe airlock wear, airlock jamming, product damage from mechanical feed mechanisms. Pneumatic Conveying Eductors for Handling Dry Solids are extremely versatile, capable of effectively handling a wide range of materials that typically cause problems in mechanical feed devices. Because no mechanical devices come into contact with the feed product, shearing and damage is impossible. Pneumatic Conveying Eductors for Handling Dry Solids can be used successfully to handle very fine, abrasive, flakey, irregular shapes, sanitary product, high temperature, corrosive and low flow rates.

  • Bag dump stations.
  • Abrasive material handling.
  • Improve performance of existing rotary valve installations.
  • Sensitive material handling.
  • High temperature and varying size solids.
Pneumatic Conveying Eductors conveying product from bag dump stations
Fig. 217P or Fig. 218P Pneumatic Conveying Eductor in Bag Dump Stations.
Solids handling eductors are ideal for conveying product from bag dump stations. Food additives (sanitary dump stations) and fine powders (talc, resins) are examples of bag dump applications that benefit from eductor technology. Placed below the hopper in a bag dump station, eductors eliminate blowback due to leakage and control dust clouds by creating a vacuum and drawing the product in. The result is an improved work environment.
Solids Handling Eductors in abrasive material handling application
Fig. 217P or Fig. 218P Eductor in Abrasive Material Handling Application.
Solids handling eductors convey abrasive materials, (including coke fines, sand, metal powders, etc.) with no moving parts. The result is less downtime from close tolerance wear problems associated with rotary valve designs. A variety of options can be used to increase the strength and wear resistance of eductors to meet the exact specifications of almost any application. Cast iron solids handling eductors can be hardened to 55 Rockwell “C” throughout, carbon steel eductors can be surface hardened, and eductors with ceramic wear parts are available as well.
Pneumatic Conveying Eductors in airlock installations
Fig. 217P or Fig. 218P Pneumatic Conveying Eductors In Existing Installations that Employ Rotary Valves.
Eductors have been proven to improve performance and efficiency. They deliver considerable economic benefit by venting and recovering blowback air and product using existing shop air at 50-80 psi. Solids handling eductors can recycle solids back to the feed bin or boost vent air directly into the conveyor line. They are commonly employed in both single or double airlock installations to extend air lock life. In existing installations that employ rotary valves, solids handling eductors have been proven to improve performance and efficiency. They deliver considerable economic benefit by venting and recovering blowback air and product using existing shop air at 50-80 psi. Solids handling eductors can recycle solids back to the feed bin or boost vent air directly into the conveyor line. They are commonly employed in both single or double airlock installations to extend air lock life.
Pneumatic Conveying Eductors conveying sensitive material with minimal damage
Fig. 217P or Fig. 218P Pneumatic Conveying Eductor Used in Sensitive Material Handling.
The absence of moving parts creates the opportunity to convey sensitive materials with less damage. Plastic pellets suffer less chipping, activated carbon experiences less degradation, and pet foods are transported with less product loss. Additionally, solids handling eductors can be employed in sanitary installations for a fraction of the cost of rotary valve technology.
Pneumatic Conveying Eductors in applications using high temperature and varying size solids
Fig. 217P or Fig. 218P in Applications Using High Temperature & Varying Size Solids.
Solids handling eductors effectively replace troublesome mechanical feed equipment to handle materials exhibiting a wide range of shapes and sizes as well as applications that employ high temperatures. Unlike mechanical devices, solids handling eductors have no moving parts and are not sensitive to the high temperatures associated with many of these applications. Solids handling eductors easily handle materials with particle sizes of up to 1/6 the diameter of the line size.