1G-type stainless steel single screw pumpProduct Overview and Working Principle:
The G-type single screw pump is a new type of pump that operates based on the principle of rotary meshing displacement. The main working components are the eccentric screw (rotor) and the 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 ℃).
Therefore, the stator of a single screw pump is made of various elastic materials, so this pump has characteristics that general pump types cannot handle for conveying high viscosity fluids and conveying media containing hard suspended particles or fiber media. Its flow rate is proportional to the rotational speed.
Single screw pumps can be driven directly through couplings, or through devices such as speed regulating motors, V-belts, gearboxes, etc.
The G-type single screw pump has fewer 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.

IIG-type stainless steel single screw pumpTechnical parameters:
Flow rate: 0-150m3/h;
Head: 60-120m;
Power: 0.75-37kw;
Speed: 500-960r/min;
Caliber: 20-135mm;
Temperature: -15-200 ℃

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

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

IIIG-type stainless steel single screw pumpScope of use:
The main working components of G-type single screw pump are eccentric screw (rotor) and fixed liner (stator). Using non-toxic and odorless edible rubber, the working temperature can reach 120 degrees Celsius. If using high temperature of 120 degrees Celsius to 350 degrees Celsius, it can be the same as this unit. Due to the special geometric opening of these two components, they form separate sealed chambers. The medium flows uniformly in the axial direction. The internal flow rate is reduced while the volume remains unchanged. The pressure is stable, so there will be no product turbulence or agitation. The output pressure of each stage pump is 0.6MPa-1.2MPa, with a head of 60m-120m (for clean water), and the self-priming height is generally above 3m.

4、 Structural diagram of G-type single screw pump:

5、 Guidelines for using G-type single screw pump
4.1 Starting of G-type single screw pump
The screw pump should be started with the suction and discharge stop valve fully open to prevent overload or empty suction.
Although screw pumps have dry suction capacity, they must prevent dry running to avoid scratching the working surface.
If the pump needs to be started when the oil temperature is very low or the viscosity is high, it should be started with the suction and discharge valves and bypass valves fully open to minimize the load when starting the pump until the prime mover reaches the rated speed, and then gradually close the bypass valve.
When the bypass valve is opened, the liquid continuously circulates in the pump with throttling, and the more oil is circulated and the longer the circulation time, the more severe the heating of the liquid, and even the pump may be damaged due to high temperature deformation, which must be taken into account.
4.2 Operation of G-type single screw pump
Screw pumps must operate in a predetermined direction to produce a certain amount of suction and discharge.
When the pump is working, attention should be paid to checking the pressure, temperature, and the operation of the mechanical shaft seal. Minor leakage should be allowed for the shaft seal, and if the leakage does not exceed 20-30 seconds per drop, it is considered normal. If the pump produces noise during operation, it is often caused by low oil temperature, high oil viscosity, air entering the oil, misalignment of the coupling, or excessive wear of the pump.
4.3 Parking of G-type single screw pump
When the pump is stopped, the discharge stop valve should be closed first, and the suction stop valve should be closed after the pump has completely stopped running.
4.4 Maintenance of G-type single screw pump
Screw pumps are prone to bending and malfunction due to the large length and poor rigidity of the working screw. The connection of the shaft system must be well aligned; The alignment work is carried out after installation and positioning to avoid deformation caused by pipeline entanglement; When connecting pipelines, they should be independently fixed to minimize the impact on the pump. In addition, the spare screw is suspended and fixed during storage to avoid deformation caused by uneven placement. In the third century BC, Archimedes invented the spiral rod, which can smoothly and continuously lift water to a height of several meters. Its principle is still used in modern screw pumps.

6、 Precautions for using G-type stainless steel single screw pump
1. It is strictly prohibited to operate the G-type single screw pump without a medium to avoid damage to the design.
Before using the G-type single screw pump, the operating direction must be determined first and must not be reversed.
3. After conveying high viscosity or media containing particles and corrosiveness with a single screw pump, it should be rinsed with water or solvent to prevent blockage and avoid difficulty in starting next time.
4. For G-type single screw pumps that have been newly installed or stopped for several days, they cannot be started immediately. Instead, an appropriate amount of engine oil should be injected into the G-type single screw pump body first, and then the pipe clamp plate should be turned a few times before starting.
5. Single screw pumps should queue up for liquid accumulation in winter to prevent freezing and cracking.
If any abnormal situation occurs during the operation of the single screw pump, it should be stopped immediately to check the cause and eliminate the fault.
During the use of the G-type single screw pump, lubricating oil should be regularly added to the bearing box. If seepage is found at the shaft end, the oil seal should be promptly treated or replaced.

7、 Advantages of G-type single screw pump compared to other commonly used water pumps:
Compared with diaphragm pumps, G-type single screw pumps can transport various mixed impurities containing gases and solid particles or fibers, as well as various corrosive substances;
Compared with centrifugal pumps, G-type single screw pumps do not require valve installation and have stable linear flow;
Unlike plunger pumps, diaphragm pumps, and gear pumps, stainless steel G-type single screw pumps can be used for drug filling and metering;
Compared with gear oil pumps, stainless steel screw pumps can transport high viscosity substances.