Chip, Wood, Pulp & Alternative
Fuel Rotary Feeders

Precision’s Rotary Feeder is a step above the competition! Whether your
material handling system is running wood, chips, pulp, alternative fuels
or another type of organic material, Precision’s Rotary Feeder’s stationary
hardened tool steel knife ensures that only uniform sized materials are
being introduced into the system. An airlock and a metering device all in one!



What Makes Precision’s Rotary Feeder Work




An 8-pocket helical rotor vane arrangement creates a scissoring action to shear off large pieces, which minimizes feeder jamming.


Application Specific

Every Rotor and Barrell are perfectly mated up to meet the specifications of the application. Precisely machined to operate within the specified temperature and at the optimum throughput.



The only truly rebuildable rotary valve in the industry! Built for outage to outage functionality. Minimal maintenance ensures this unit meets your expectations! Able to be rebuilt, refreshed and reused!


Upgrades & Accessories

A variety of upgradeable options exist so your new feeder can be perfectly equipped for your specific application.



Access door provides easy access to inspect clearances and to also provide knife adjustment.


Hardened Steel Knife

Equipped with a hardened steel knife, which is adjustable to maintain optimal clearance. The knife ensures a consistent material size is being fed into the system.


HD Bearings

Equipped with high load outboard tapered roller bearings, which are heavy-duty, industrial grade to ensure proper shaft alignment.


Surface hardened

Depending upon the size, optional surface hardening is available to provide additional abrasion resistance!


Key Advantages

…for long-running cycles before rebuilding or replacement should be considered; a minimum of one year for the most abrasive products up to 5-7 years or more for less abrasive products.

…to minimize rotor-to-barrel clearances and limit blowby (leakage) in pneumatic conveying applications.

…are well-suited for handling abrasive materials and can often double the cycle between rebuilds.

…alleviates the need for extensive pre-processing of the product/fuel as the feeder can adapt to varying,
non-homogenous conditions.

…the robust design of the PMR feeders handles dirt, sand, small rocks, and small metal such as nails or screws with minimal disruption to your process and minimal damage to the feeder.

…can make an economic difference to your plant’s operations. PMR feeders are adaptable to a wide range of fuel types and specifications without changing the feeder configuration or options; this provides maximum flexibility to source fuels.

PMR Rotary Feeder Industries

See how the PMDS Self-Cleaning Rotary Valve can help you in your industry.

  • Pulp
  • Cement
  • biomass
  • coal
  • Food
  • Metals

Designed For Performance.Built To Last.

  • Fabricated housing with an integral mild steel or Tri-Braze barrel; barrel thicknesses from 5/8” to 1-1/8” thick depending on feeder size.
  • The barrel is precision-bored to a concentric, known diameter to provide a true fit with the rotor
  • All barrels are overlaid with an industrial hard chrome, the typical thickness is 0.005” to 0.009” depending on feeder size – provides the first-line defense against abrasive wear.
  • Rotors are an 8-vane, helical arrangement with closed ends; leading edge of each rotor vane is tipped with 308 SS for wear resistance and each rotor end has an integral scraper to minimize material buildup.
  • The knife-seat is CNC-machined for precise location and a no-slip placement of the tool steel knife to assure good knife life and effective material shearing.
  • An access door in the feeder housing makes knife adjustment or replacement easy
  • The endbells include adjustable brass seals to minimize the possibility of pressurized air migration past the rotor end in pneumatic applications.
  • Heavy-duty Dodge piloted flange bearings installed outboard of the housing to isolate heat, moisture, and dirt from the bearings.
  • Nord, SEW, or Sumitomo shaft-mounted gear-motor drive packages for clean, safe installations providing direct application of power with options for variable speeds and other functions.

Available Options & Upgrades


Suit the physical layout of your plant, pneumatic line flow direction, and service access:
RH or LH rotor helix and CW or CCW rotation.

Smooth injection of your material into the convey line.

Operations and maintenance staff safety.

Detect and then alarm or notify that the feeder is not operating.

For corrosive applications.

Stainless steel shaft sleeves, replaceable AR400 rotor tips, double-knife configurations, plow knives, and oversized tool-steel knives.

Stainless steel shaft sleeves, replaceable AR400 rotor tips, double-knife configurations, plow knives, and oversized tool-steel knives


Technical Specifications

MATERIAL TYPES Maximum particle size varies by feeder size; ½” to ¾” cross-sectional dimensions can normally be fed – depending somewhat on the wood species, dryness, and other factors.
Green chips with high moisture content up to 30-40% or more can be fed in a standard PMR configuration; above 30-40% moisture, particularly for Southern Yellow Pine chips or residue, stainless steel construction may be recommended.
Chips or wood residue with high pitch content may lead to a build-up of pitch on the barrel surface; this causes no harm to
the feeder and there is no specific recommended feeder configuration or option to combat this but it will require more frequent maintenance.
Most PMR feeder applications are for ambient temperature products. In some cases, dryer discharge in a wood pellet plant for example, the product temperature may be elevated. PMR feeders can be operated with product temperatures up to 1000° F.
POWER REQUIREMENTS Drive motors powered by
230/460V 3Ph 60Hz
575V 3Ph 60Hz
Other voltages and frequencies available
Zero speed sensors operate at control voltage.
VFD’s operate single-phase up to system voltage.
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Precision Machine & Manufacturing offers a Component Rebuild Program that can cost as little as 75% of a new component.

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Why Precisions?

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sed quia non incidunt lores ta porro ame. -Steve Wison, Monarch Cement


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Let our applications specialists
help you with your extreme-duty
bulk material handling needs.


With your toughest material handling challenges


Let our applications specialists
help you with your extreme-duty
bulk material handling needs.


With your toughest material handling challenges