Bulkmatic Dosing Screws are manufactured to suit customer feed requirements. The units can be supplied as volumetric feeders where a variable speed drive is used to change the dosing rate. Alternatively loadcells can be integrated into the system to provide accurate loss in weight feed of material. For extreme turndown ratios the electric drive motor can be supplied with a cooling fan.

A horizontal paddle above the dosing screw ensures that the material is evenly fed into the dosing screw. This allows accurate feeding of the most difficult materials. Paddle types are selected according to the material fed through the dosing screw.

On the standard version the paddle is driven via the screw shaft with a chain and chain tensioner. Alternatively the paddle shaft and screw shaft can be driven independently by two geared motors.

Dosing screws can be fitted with manual dump hoppers or the inlet hopper sized and designed for automatic refilling – either by using level sensors to control the head of material or by using the integrated loadcells on the loss in weight system.

Both the driven and non-driven ends of the paddle and the driven end of the dosing screw are fitted with stuffing glands to ensure a dust tight sealing arrangement. The outboard bearings are mounted on standoffs to allow easy access to the stuffing gland while the bearings on the driven end are housed under the gear and chain guard.

Standard outlet sizes include: 40NB, 65NB and 80NB.

Other sizes and configurations are available on request.

Dosing Screws

UNIT NO.	A	B	C	D	E	F	G	H	N	DIA1	DIA2	J	K	L	M	P	Q	DIA3	POWER kW	WEIGHT kg
DS-040	405	375	325	503	310	560	537	100	12	14	60,32	100	370	535	657	4	141	12	0,55	120
DS-065	405	375	325	503	330	560	537	100	12	14	88,9	150	370	535	657	4	138	12	0,55	135
DS-080	405	375	325	503	330	560	537	100	12	14	114,3	200	370	535	657	4	130	12	0,55	145