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Air Seeder Features & Options

Positive Displacement Metering PLUS

The Heart of the Bourgault Air Seeder

The Positive Displacement Metering (PDM) Plus metering system incorporates a precise, finely pitched auger which draws product from a large, flow-through sump, through a machined metering orifice, then deposits it into the air stream.

A precise, finely pitched high-density poly metering auger draws product from a large, flow-through sump, through a machined metering orifice into the straight-thru distribution line.
High-density poly metering augers coupled with precisely matched steel orifices provide accurate metering and low maintenance. The polyethylene auger provides consistent seeding rates, even with problematic products such as treated seed and certain fertilizers.
The pitch of the auger increases as the seed is carried to the product transfer line to ensure consistent rates, even with fine seeds.
The PDM Plus metering system is gentle, even on peas and lentils. PAMI Research Update #702 found that average seed damage of all tests was 0%.
The PLUS of the Bourgault metering system is the single point sump. The sump provides an even and consistent draw of product, even at low tank levels. Wide metering rolls used on competitors’ models may experience uneven product draw at low tank levels as the product is metered. The large flow-through sump PDM allows for easy and complete tank clean out and metering auger inspection.
Optional High Output single flight metering augers are available for Producers who require very high metering rates. Optional steel augers are also available.
The Bourgault metering and distribution system has been proven to be extremely safe for even the most delicate of seeds by independent research groups. Refer to PAMI Research Study Update #756 which studied the effect of several product distribution systems in chickpeas.

The cut-away of the PDM Plus metering assembly shows the precise, finely pitched metering auger.

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