- Cast body and end plate for 8", 10" & 16" x 27"
- All metric feeders - Ductile iron body and cast iron end plates
- 0.100” (2.54 mm) thick ceramic bore
- Tungsten carbide throat protection
- Heavy-duty fabricated 8-vane rotor
- Tungsten carbide rotor vane and shroud tips, 0.100” (2.54mm) thick
- Air purge seal connections
- Air gap between seals and bearings
- Outboard sealed ball bearings
- Maximum operating temperature: 200°F (100°C)
- Rotors, 0.100" (2.54mm) tungsten carbide overlay on tips of vanes and shroud
- Body, 0.100" high alumina ceramic tile bore with strip of 0.100" tungsten carbide at the leading edge of the throat at the bore
The Metric feeder is ruggedly constructed to maintain roundness. It can be furnished with either a closed or open end rotor. The throat inlet is angled to induce a shearing action for smoother operation. An optional port is available and extends the full length of the body. It may be used as an inspection panel and clean-out port. The inlet flange easily adapts to a square or a standard 125 Ib. ASA flange on Models 150, 300, 700, 2500.
Two basic designs are available - open or closed end. All rotors have eight (8) vanes with a minimum of four (4) vanes sealing at all times to minimize leakage. Rotors can be furnished with beveled blades and hard-coated tips as required.
Designed to assure efficient sealing of the shaft with two (2) lip seals and two (2) lantern rings or three (3) rows of packing and one (1) lantern ring per end plate. Pipe taps are provided for the air purge and lubrication of the lip seals. Standard design includes lantern rings, lip seals and outboard sealed bearings.
Motor support lugs are cast as an integral part of the feeder body to permit the mounting of a gearmotor directly on the unit, resulting in a compact package requiring minimum space.
All integral horsepower gearmotors are TEFC, 1.15 Service Factor, Class "F" insulation and corrosion-resistant. All standard gearmotors are 230/460 volts, three (3) phase, 60 Hz. Standard drives are roller chain with OSHA approved guards. Oil bath guards are also available.
Note: All standard Feeders (Airlocks) are designed to handle material in conveying systems that operate up to a maximum pressure differential of 5 PSIG (1.05 Kg/cm2).
The DA Feeder introduces material into the conveying system at highest volumetric efficiency when material flow into the feeder is controlled to permit free venting. The feeder may be used under a head of material when appropriate aeration is provided to create a path for relief of the reverse air flow. In operation, air enters a single inlet and passes into the rotor pocket through two (2) ducts integrally cast in the end plates, assuring complete fluidization and discharge. High efficiency is attained through the combination of gravity and air-sweeping of the fluidized material into the conveying line. This design principle assists greatly in discharging materials which have a tendency of hanging up in the rotor pockets. DA Feeder permits the use of smaller sized components and related equipment in pressure pneumatic conveying systems resulting in savings in initial equipment cost, installation cost and space requirements.
Available with or without motor drive, discharge pan and support base
The DA Feeder is constructed of machined #50 cast iron and incorporates a deep packing gland, outboard anti-friction bearings and an extra heavy shaft. Lantern rings are provided to permit use of purge air when handling fine, powdery material to prevent contamination of shaft packing.
The DA Feeder cast iron rotor features eight (8) equal pockets with volumes up to 1.6 cubic feet ( .05m3 ) per revolution. Rotors with beveling on the trailing edge are recommended for handling materials that have a tendency to smear.
The DA Feeder is designed for pressure differentials up to 18 PSIG (1.27 Kg/cm2).
Motor support lugs are cast as an integral part of the feeder body to permit the mounting of a gear motor directly on the units, resulting in a compact package requiring minimum space.
The DA Feeder with motor is equipped with a three (3) phase, 230/460 Volt A.C. 60Hz.TEFC, right angle motor unit. Sprocket and chain assembly with protective guard is included.
Discharge Pan and Support Base are optional and available at additional cost.
When installed in a pressure conveying system, the use of (optional) Lantern Rings and (standard) Air Purge is recommended when fine powdery material is being conveyed to prevent contamination of packing and bearing. The air purge should be set 2 to 4 PSIG (.14 to .28 Kg/cm2) above conveying line pressure.
Body and End Plates
The body and end plates are heavily ribbed and constructed of #50 cast iron. Motor support lugs are cast as an integral part of body and permit the mounting of the gearmotor directly on the unit, resulting in a compact package.
The end plates have integral cast outboard bearing supports and male-female joints between end plates and feeder body ensuring concentricity.
All rotors are constructed of machine #50 cast iron and have six or eight vanes with four vanes in seal between inlet and outlet except for the 2" totally enclosed feeder (airlock) which has four vanes.
The rotor shaft has a tapered hub to reduce friction from trapped material between rotor and end plates. Anti-friction bearings are shielded, and mounted on rotor shaft outboard of the packing gland.
Beveling of the rotor vane is recommended if the material has a tendency to build up and smear.
All gearmotors are mounted directly to feeder body except the 2" and 5" (50 mm and 125 mm) TE Feeders which incorporate a single common steel base plate.
All fractional gearmotors are TENV. All integral horsepower gearmotors are TEFC. All gearmotors are 3 phase, 230/460 Volts, 60 Hz.
All standard feeders (airlocks) are designed to handle material having a maximum temperature of 150° F (65° C). Above 150° F (65° C requires additional periphery and end clearances. From 700° F to 900° F (371° C to 482° C) requires additional clearance and water cooled shaft. Above 900° F (482° C) and not in excess 1200° F (650° C) requires ductile iron construction, special bearings and water cooled rotor.
Note: Basic assemblies are also available
FLSmidth manufactures three (3) types of “P” feeders with closed end rotors:
Type I Body end plates constructed of #50 cast iron with fabricated stainless steel rotor.
Type II Body and rotor constructed of type 304 stainless steel with aluminum end plates.
Type III Complete 304 stainless steel (body, rotor and end plates).
Body and End Plates
The body and end plates have heavy-duty construction and permit minimum rotor clearances. Motor support lugs are cast as an integral part of the body, and permit the mounting of the gearmotor directly on the unit, resulting in a compact package.
The end plates have integral-cast outboard bearing supports and male-female joints between end plates and feeder body ensuring concentricity.
All rotors are beveled and constructed of type 304 stainless steel or fabricated steel. Rotors have six or seven vanes with at least four vanes in seal between inlet and outlet.
Bearings are shielded, anti-friction and mounted on rotor shaft outboard of the packing gland.
Motor Mount & Drive
Gearmotors are mounted directly to feeder body. Fractional gearmotors are TENV. Integral horsepower gearmotors are TEFC. All gearmotors are 3 phase, 230/460 Volts AC, 60 Hz.
All standard “P” Rotary feeders (airlocks) are designed to handle material having maximum temperature of 150°F (65°C). Above 150°F to 450° (65°C to 232°C) requires additional periphery clearance.
Note : Basic assemblies (with/out Drive) are also available.