FG series integral stainless steel sanitary screw pump

NegotiableUpdate on 03/27

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Overview

FG series integral stainless steel sanitary screw pump

Product Details

Product Principle

Single screw pump is a new type of pump that operates based on the principle of rotary meshing displacement. Its main working components are eccentric screw (rotor) and fixed bushing (stator). Due to the special geometric shape of these two components, they form separate sealed chambers, and the medium flows uniformly in the axial direction. The internal flow velocity is low, the volume remains constant, and the pressure is stable, so there will be no vortex or agitation. The output pressure of each stage pump is 0.6MPa, the head is 60m (for clean water), and the self-priming height is generally 6m. It is suitable for conveying medium temperatures below 80 ℃ (special requirements can reach 150 ℃). Due to the selection of multiple elastic materials for the stator, this pump has characteristics that are not suitable for general pump types when transporting high viscosity fluids and media containing hard suspended particles or fiber media. Its flow rate is proportional to the speed.
Transmission can be achieved directly through couplings, or through devices such as variable speed motors, V-belts, gearboxes, etc.
This type of pump has few parts, compact structure, small volume, and easy maintenance. The rotor and stator are the vulnerable parts of this pump, and the structure is simple and easy to assemble and disassemble.

Product Features

GF type sanitary single screw pump is a new type of pump that operates based on the principle of rotary meshing displacement. Its main working components are eccentric screw (rotor) and fixed bushing (stator). Due to the special geometric shape of these two components, they form separate sealed chambers, and the medium flows uniformly in the axial direction. The internal flow velocity is low, the volume remains constant, and the pressure is stable, so there will be no vortex or agitation. Screw pumps have fewer vulnerable parts, compact structure, small volume, easy maintenance, simple structure, and are easy to assemble and disassemble.

rotor
The rotor has high-quality surface characteristics. In order to ensure the quality and corresponding surface quality of this rotor, the most advanced production, grinding, and coating processes have been adopted. By using various grinding and polishing processes, the surface roughness will be greatly reduced, which improves the fatigue resistance and corrosion resistance of the rotor, as well as the wear resistance and hardness characteristics of the rotor.

The benefits of surface optimization include reduced starting and operating torque, improved hydraulic volumetric efficiency, smooth operating characteristics, and increased service life

stator
Only with sufficient coordination between the rotor and starter can work efficiency be maintained at a high level and transmission power be reduced. For this reason, a stable geometric shape between two transmission elements is crucial. The calibrated magnetic core can prevent the starter end from becoming noticeably thinner.
This ensures smooth operation throughout the entire length of the starter.
Usually, Li Quan specializes in manufacturing stators according to each size and pressure level. It is precisely this method of producing stators according to specifications that enables the production of stators with sealed flanges at both ends of the pipeline.

sealing form
The safety sealing of the rotating shaft is a special challenge, and the shaft seal is selected based on the operating conditions and the characteristics of the transmission medium. Customers can choose the appropriate shaft seal according to their specific working conditions.

A continuously variable transmission can be equipped according to the different media usage needs of customers, and the motor speed and output flow can be manually adjusted

Sanitary screw pump is a new type of pump that works according to the principle of rotary meshing displacement. The main working components are eccentric screw (rotor) and fixed liner (stator).

Due to the special geometric shape of these two components, they form separate sealed chambers, and the medium flows uniformly in the axial direction. The internal flow velocity is low, the volume remains constant, and the pressure is stable, so there will be no vortex or agitation. The output pressure of each stage pump is 0.6MPa, the head is 60m (for clean water), and the self-priming height is generally 6m. It is suitable for conveying medium temperatures below 80 ℃ (special requirements can reach 150 ℃). Due to the selection of multiple elastic materials for the stator, this pump has characteristics that general pump types cannot handle for transporting high viscosity fluids and media containing hard suspended particles or fiber media. Its flow rate is proportional to the rotational speed. Transmission can be achieved directly through couplings, or through devices such as variable speed motors, V-belts, gearboxes, etc. This screw pump has few parts, compact structure, small volume, and easy maintenance. The rotor and stator are vulnerable parts of this pump, and the structure is simple and easy to assemble and disassemble. The working principle of a single screw pump is that when the screw pump is working, the liquid is sucked in and enters the sealed space surrounded by the threads and pump casing. When the active screw rotates, the sealing volume of the screw pump is increased by the compression of the screw teeth, and moves axially. Due to the constant rotation of the screw, the liquid outflow flow rate is also uniform. The characteristics of a single screw pump are: small losses and good economic performance. High and uniform pressure, uniform flow rate, high speed, capable of direct connection with the prime mover.

petroleum industry	Chemical and Pharmaceutical Industry	Environmental Engineering	Mineral Engineering	food industry	papermaking industry
Heavy oil transportation Oil and gas mixed transportation Oil water separation and waste oil recovery system sewage treatment Polymer transportation	Various types of paste like substances Various types of emulsions Various types of suspensions Various types of gas and solid liquids Various media that cannot be disturbed or sheared	Various types of sewage transportation Dehydrated sludge transportation Measurement and dosing of coagulants and their chemical preparations Oil water separation and waste gas degradation	Coal water slurry equipment and transportation Production equipment for titanium dioxide, kaolin, calcium carbonate, etc Feed the rotating fluid and filter body Chemical dosing Loading and grouting Electrolyte treatment	dairy products Juice, puree, vegetable sauce Meat mince and seasonings Beer and Brewing	Raw material equipment Coating and coloring process stoichiometry Slurry making and wastewater treatment

● serial number
G	F	70	2	A
G series single screw pump	Material of overcurrent components	Specification Code	Pump series (lead)	High hardness rotor

G-type single screw pump conveying method:
G型单螺杆泵输送方式

Selection of rubber sleeve for G-type single screw pump:
The selection of rubber sleeve for G-type screw pump. The sleeve of the screw pump is made of rubber and is also a vulnerable part of the single screw pump. The quality of its selection directly affects the life of the sleeve. Generally, the life of the sleeve is 6-12 months under normal circumstances. If not selected properly, the sleeve may fall off from the steel pipe or the rubber may fall off. So we are required to have an understanding of the basic characteristics of rubber and its adaptability to various media. Based on our experience, we have compiled the above characteristic table.

Basic characteristics of rubber

Rubber properties	Nitrile rubber NBR	Chloroprene rubber CR	Fluororubber PPM	Ethylene propylene rubber (EPDM)
Maximum temperature resistance	+120°C	+110°C	+200°C	+150°C
wear resistance	Excellent	Very good	Excellent	Very good
Aging resistance	Very good	Very good	Excellent	Excellent
ozone-resistant	No	Excellent	Excellent	Excellent
Steam resistant	Very good	No	Excellent	Excellent
Flame resistance	Very good	Excellent	Excellent	Excellent

Rubber is commonly used for the lining of single screw pumps

Rubber adaptability	Ethylene propylene rubber (EPDM)	Fluororubber PPM	Chloroprene rubber CR	Nitrile rubber NBR
Water (sewage)	Very good	Very good	Very good	Very good
vegetable oil	average	Very good	average	Very good
mineral oil	No	Very good	average	Very good
ammonia water	average	No	No	Very good
Aromatic solvent	No	Very good	No	No
Concentrated alkali	Very good	No	Very good	Very good
concentrated nitric acid	No	average	No	No
glacial acetic acid	No	Very good	No	Very good
dilute sulfuric acid	Very good	Very good	No	Very good
concentrated sulfuric acid	average	Very good	No	No
dilute hydrochloric acid	Very good	Very good	Very good	Very good
concentrated hydrochloric acid	Very good	Very good	No	Very good
hot water	Very good	No	No	average
gasoline	No	Very good	average	Very good
toluene	No	Very good	No	No
xylene	No	Very good	No	No
ethanol	Very good	Very good	Very good	average
kerosene	No	Very good	Very good	Very good
diesel	No	Very good	No	Very good
Chlorinated hydrocarbon	No	average	No	No
Ketone containing materials	Very good	No	No	No
Materials containing alcohols	Very good	Very good	Very good	Very good
Lipid containing materials	Very good	No	No	No
Ether containing materials	Very good	No	No	No
mud	Very good	average	average	Very good
phosphoric acid	Very good	average	Very good	average
sodium carbonate	Very good	No	Very good	Very good
furfural	Very good	average	average	average
Benzene 100	No	Very good	No	No
acetone	Very good	No	No	No
Sesame oil	Very good	Very good	Very good	Very good
carbon disulfide	No	Very good	No	No

Reasons and troubleshooting methods for G-type single screw pump faults:

fault	reason	exclusion method
1. The pump cannot start	a、 The new pump rotation and stator fit too tightly b、 Voltage and current are too low c、 Medium viscosity too high	a、 Use tools and manpower to help rotate a few turns b、 Check and adjust c、 Dilution liquid
2. The pump cannot produce liquid	a、 The rotation direction is incorrect b、 There is a problem with the suction pipeline c、 Medium viscosity too high d、 Damage to the rotor, stator or transmission components e、 Blockage of the guide material inside the pump	a、 adjust direction b、 Check for leaks, open the inlet and outlet valves c、 Dilution liquid d、 Check and replace c、 Exclude replacement
3. Traffic cannot be reached	a、 Pipeline leakage b、 Valves not fully opened or partially blocked c、 The speed is too low d、 Wear of rotor and stator	a、 Check and repair the pipeline b、 Open all valves and remove blockages c、 Adjust the speed d、 Replace damaged parts with another one
4. The pressure cannot be reached	a、 Wear of rotor and stator	a、 Replace the rotor and stator
5. Motor overheating	a、 Motor failure b、 Export pressure too high, motor overload c、 The stator is burnt out or stuck to the rotor	a、 Check the motor, voltage, current, and frequency b、 Check the head, fully open the outlet valve, and eliminate blockages c、 Replace damaged parts
6. Rapid decrease in flow pressure	a、 Sudden blockage or leakage of pipelines b、 Poor stator wear c、 Sudden change in liquid viscosity d、 Sudden voltage drop	Refer to the following items and exclude them one by one
7. A large amount of liquid leaked from the shaft seal	a、 Soft packing wear b、 Mechanical seal damage	a、 Tighten or replace the packing material b、 Repair or replace

Performance parameters at fixed speed

model	traffic (m³/h)	pressure (Mpa)	Allow the most High RPM (r/min)	motor power (kw)	Necessary gas Corrosion allowance (m)	Import Law Lantong diameter (mm)	Export Law Lantong diameter (mm)	Allow particles Particle diameter (mm)	Allow fiber Dimension length (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	14	0.6	720	5.5	4.5	100	80	5	50
G50-2		1.2		7.5
G60-1	22	0.6	720	11	5	125	100	6	60
G60-2		1.2		15
G70-1	38	0.6	720	11		150	125	8	70
G70-2		1.2		18.5
G85-1	56	0.6	630	15		150	150	10	80
G85-2		1.2		30
G105-1	100	0.6	500	30		200	200	15	110
G105-2		1.2		55
G135-1	150	0.6	400	45		250	250	20	150
G135-2		1.2		90

Single stage, performance parameters for gear shifting, electromagnetic speed regulation motor with gear shifting, or continuously variable speed motor with gear shifting

model	Pressure 0.3Mpa			Pressure 0.6Mpa			Adjustable RPM
model	revolution (r/min)	traffic (m³/h)	electric motor power (kw)	revolution (r/min)	traffic (m³/h)	electric motor power (kw)	revolution (r/min)	traffic (m³/h)	electric motor power (kw)
G20-1	960	0.96	0.75-6 levels	960	0.8	0.75-6 levels	125~1250	0.1～1.5	1.1
	720	0.8	0.55-8 levels	720	0.5	0.75-8 levels
	510	0.4	0.55-4 levels/gearbox	510	0.3	0.75-4 levels/gearbox
G25-1	960	2.4	0.75-6 levels	960	2	Levels 1.5-6	125~1250	0.1～3	1.5
	720	1.5	0.55-8 levels	720	1.27	Levels 1.1-8
	510	1.08	0.55-4 levels/gearbox	510	0.9	1.1-4 levels/gearbox
G30-1	960	3.6	Levels 1.5-6	960	3	Level 2.2-6	125~1250	0.2～4	2.2
	720	2.28	Levels 1.1-8	720	1.9	Levels 1.5-8
	510	1.63	1.1-4 levels/gearbox	510	1.35	1.5-4 levels/gearbox
G35-1	720	4.8	Level 2.2-8	720	4.04	Level 3-8	125~890	0.3～5	3
	510	3.36	1.5-4 levels/gearbox	510	2.8	2.2-4 levels/gearbox
	380	1.92	1.1-4 levels/gearbox	380	1.60	1.5-4 levels/gearbox
G40-1	510	6.8	2.2-4 levels/gearbox	510	5.6	3-4 levels/gearbox	125~890	0.3～10	4
	380	5.1	1.5-4 levels/gearbox	380	4	2.2-4 levels/gearbox
	252	2.65	1.1-6 levels/gearbox	252	2.2	1.5-6 levels/gearbox
G50-1	510	13.8	4-4 levels/gearbox	510	11.5	5.5-4 levels/gearbox	80~750	1~18	5.5
	380	10.2	4-4 levels/gearbox	380	7.5	5.5-4 levels/gearbox
	252	5.6	3-6 levels/gearbox	252	4.4	5.5-6 levels/gearbox
G60-1	510	20.8	7.5-4 levels/gearbox	510	16	11-4 levels/gearbox	63~630	1~20	11
	380	15.6	7.5-4 levels/gearbox	380	12	11-4 levels/gearbox
	252	7.8	5.5-6 levels/gearbox	252	6	7.5-6 levels/gearbox
G70-1	510	26	11-4 levels/gearbox	510	20	11-4 levels/gearbox	56~560	1~22	11
	380	17	7.5-4 levels/gearbox	380	13	11-4 levels/gearbox
	252	9.1	7.5-6 levels/gearbox	252	7	7.5-6 levels/gearbox
G85-1	380	32	11-4 levels/gearbox	380	25	15-4 levels/gearbox	37~370	2~24	15
	252	21	7.5-6 levels/gearbox	252	16	11-6 levels/gearbox
	189	11	5.5-8 levels/gearbox	189	8	11-8 levels/gearbox
G105-1	380	80	15-4 levels/gearbox	380	65	22-4 levels/gearbox	29~290	3~50	22
	252	44	15-6 levels/gearbox	252	34	22-6 levels/gearbox
	189	29	11-8 levels/gearbox	189	22	15-8 levels/gearbox
G135-1	380	132	37-4 levels/gearbox	380	120	45-4 levels/gearbox	18~180	3~56	45
	252	95	30-6 levels/gearbox	252	80	37-6 levels/gearbox
	189	65	18.5-6 levels/gearbox	189	53	30-8 levels/gearbox

Dual stage, performance parameters for gear shifting, electromagnetic speed regulation motor with gear shifting, or continuously variable speed motor with gear shifting

model	Pressure 0.8Mpa			Pressure 1.2Mpa			Adjustable RPM
model	revolution (r/min)	traffic (m³/h)	electric motor power (kw)	revolution (r/min)	traffic (m³/h)	electric motor power (kw)	revolution (r/min)	traffic (m³/h)	electric motor power (kw)
G20-2	960	0.96	Levels 1.5-6	960	0.8	Levels 1.5-6	125~1250	0.1～1.5	1.5
	720	0.8	Levels 1.1-8	720	0.5	Levels 1.5-8
	510	0.4	1.1-4 levels/gearbox	510	0.3	1.1-4 levels/gearbox
G25-2	960	2.4	Levels 1.5-6	960	2	Level 2.2-6	125~1250	0.1～3	2.2
	720	1.5	Levels 1.1-8	720	1.27	Levels 1.5-8
	510	1.08	1.1-4 levels/gearbox	510	0.9	1.5-4 levels/gearbox
G30-2	960	3.6	Levels 3-6	960	3	Levels 3-6	125~1250	0.2～4	3
	720	2.28	Levels 1.5-8	720	1.9	Level 2.2-8
	510	1.63	1.5-4 levels/gearbox	510	1.35	2.2-4 levels/gearbox
G35-2	720	4.8	Level 3-8	720	4.04	Level 4-8	125~890	0.3～5	4
	510	3.36	2.2-4 levels/gearbox	510	2.8	3-4 levels/gearbox
	380	1.92	1.5-4 levels/gearbox	380	1.60	2.2-4 levels/gearbox
G40-2	510	6.8	4-4 levels/gearbox	510	5.6	5.5-4 levels/gearbox	125~890	0.3～10	5.5
	380	5.1	3-4 levels/gearbox	380	4	4-4 levels/gearbox
	252	2.65	2.2-6 levels/gearbox	252	2.2	3-6 levels/gearbox
G50-2	510	13.8	5.5-4 levels/gearbox	510	11.5	7.5-4 levels/gearbox	80~750	1~18	7.5
	380	10.2	4-4 levels/gearbox	380	7.5	5.5-4 levels/gearbox
	252	5.6	3-6 levels/gearbox	252	4.4	5.5-6 levels/gearbox
G60-2	510	20.8	15-4 levels/gearbox	510	16	15-4 levels/gearbox	63~630	1~20	15
	380	15.6	11-4 levels/gearbox	380	12	15-4 levels/gearbox
	252	7.8	7.5-6 levels/gearbox	252	6	11-6 levels/gearbox
G70-2	510	26	15-4 levels/gearbox	510	20	18.5-4 levels/gearbox	56~560	1~22	18.5
	380	17	11-4 levels/gearbox	380	13	15-4 levels/gearbox
	252	9.1	11-6 levels/gearbox	252	7	11-6 levels/gearbox
G85-2	380	32	18.5-4 levels/gearbox	380	25	22-4 levels/gearbox	37~370	2~24	22
	252	21	15-6 levels/gearbox	252	16	18.5-6 levels/gearbox
	189	11	15-8 levels/gearbox	189	8	15-8 levels/gearbox
G105-2	380	80	30-4 levels/gearbox	380	65	37-4 levels/gearbox	29~290	3~50	37
	252	44	30-6 levels/gearbox	252	34	30-6 levels/gearbox
	189	29	22-8 levels/gearbox	189	22	22-8 levels/gearbox
G135-2	380	132	55-4 levels/gearbox	380	120	75-4 levels/gearbox	18~180	3~56	75
	252	95	55-6 levels/gearbox	252	80	75-6 levels/gearbox
	189	65	37-8 levels/gearbox	189	53	45-8 levels/gearbox

Performance parameters of single-stage and two-stage coal water slurry working pumps

Pump type	traffic (m³/h)	Work pressure (Mpa)	Rotation speed (r/min)	Gear reduction matching speed regulating motor (kw)
G30-2	～1	1.2	30~300	YCT160/4A-2.2
G35-2	～2	1.2	30~300	YCT160/4A-2.2
G40-2	～3	1.2	30~280	YCT160/4A-3
G50-1	～4.5	0.6	28~280	YCT180/4A-4
G50-2	～4.5	1.2	28~280	YCT200/4A-5.5
G60-1	～6.5	0.6	25~250	YCT200/4A-5.5
G60-2	～6.5	1.2	25~250	YCT200/4B-7.5
G70-1	～8	0.6	25~250	YCT200/4B-7.5
G85-1	～12.5	0.6	18~180	YCT225/4A-11
G105-1	～20	0.6	14~140	YCT225/4B-15
G135-1	～35	0.6	10~100	YCT250/4B-22

Explanation:
1. The above performance parameters are experimental data obtained during the room temperature water test;
2. For different media and speeds, performance parameters will vary, with flow rate values inversely proportional to concentration and viscosity, and directly proportional to speed;
3. Users must choose the type of pump based on usage requirements, the condition of the conveying medium, and selection principles, or consult with our company's technical department to determine the type of pump.
4. For water coal slurry pumps, the transmission form is gear speed regulation matched with electromagnetic speed regulation motors or mechanical continuously variable speed motors, and the flow rate is infinitely adjustable with the change of speed.