Screw Pump

G series single screw pump is a rotor type positive displacement pump. It relies on the meshing of the screw and the bushing to produce volume changes in the suction chamber and the discharge chamber to transport liquid. It is an internal meshing closed screw pump. The main working parts are composed of a bushing with a double-headed spiral cavity and a single-headed spiral screw meshing with it in the stator cavity.

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Overview of Screw Pump:

The transmission of the G type single screw pump can adjust the flow rate by adjusting the speed to achieve the purpose of controlling the flow rate. It can also be directly driven by a coupling, or by using high-speed motors, V-belts, gearboxes and other devices to change speed.

Working Principle:

The elastic stator with a special helical cavity meshes with the rotor with a large lead and high tooth height, forming a continuous sealing line in the stator cavity to separate the suction cavity from the extrusion cavity. When the rotor rotates, the cavity moves continuously in the discharge direction, so that the material is continuously sucked and discharged.

Product structure and features:

The main components of the G-type single screw pump are the discharge chamber, rotor, stator, universal joint, intermediate shaft, suction chamber, shaft seal, and bearing seat.

1. Simple structure, stable operation.
2. Wide range of applications, can convey flowing and even non-flowing materials.
3. The medium will not be agitated during pumping, and will not be squeezed or sheared.
4. High efficiency, the conveying volume is proportional to the speed, and the conveying volume can be adjusted by variable frequency.
5. Strong self-priming ability, suitable for viscous materials.
6. The installation position of the pump can be tilted arbitrarily;
7.Small size, light weight, low noise, easy maintenance.

Uses and Applications:

Screw pump is the most commonly used feed pump for filter press. As a feed pump, we generally use a single screw pump, which has the advantages of stable flow, strong suction, low noise, high efficiency, and can transport viscous materials. It is widely used in chemical, pharmaceutical, brewing, papermaking, food and other industries.

G series single screw pump parameter table:

Model	Flow rate	Pressure	Maximum allowable speed	Motor power	Required NPSH	Inlet flange diameter	Outlet flange diameter	Allowable particle diameter	Allowable fiber length
	(m³/h)	(Mpa)	(r/min)	(kW)	(m)	(mm)	(mm)	(mm)	(mm)
G20-1	0.8	0.6	960	0.75	4	25	25	1.5	25
G20-2		1.2		1.5
G25-1	2	0.6	960	1.5		32	25	2	30
G25-2		1.2		2.2
G30-1	5	0.6	960	2.2		50	40	2.5	35
G30-2		1.2		3
G35-1	8	0.6	960	3		65	50	3	40
G35-2		1.2		4
G40-1	12	0.6	960	4		80	65	3.8	45
G40-2		1.2		5.5
G50-1	20	0.6	960	5.5	4.5	100	80	5	50
G50-2		1.2		7.5
G60-1	30	0.6	960	11	5	125	100	6	60
G60-2		1.2		15
G70-1	45	0.6	720	11		150	125	8	70
G70-2		1.2		15
G85-1	60	0.6	720	15		150	150	10	80
G85-2		1.2	450	22
G105-1	80	0.6	400	22		200	200	15	110
G105-2		1.2	350	30
G135-1	120	0.6	350	37		250	250	20	150
G135-2		1.2	280	——

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