The maximum output pressure of a single screw pump is determined by the number of bushing stages, the number of bushing leads:

Level 1: The maximum working pressure is 0.6 MPa;

Level 2: The maximum working pressure is 1.2 MPa;

Level 4: The maximum working pressure is 2.4 MPa;

Due to the different transmission media, for media containing severe wear, please refer to Table 1, select the liner series.

Table 1: According to the choice of media wear liner series

2. Single screw pump speed selection:

Because of its structural features, most of the single-screw pumps are used to convey liquids with high viscosity and particles containing liquids. Therefore, the selection of the number of rotations is very important. According to experience, we can list Table 2 and Table 3, you can synthesize according to the specific situation consider.

Table 2: Select the pump speed according to the wear of the medium

* The table shows the specific media delivered and its wear characteristics of the special cases, please note that the characteristics of the media with its concentration and temperature changes.

* When the pump size is large, the speed should be selected lower.

Table 3: Select the pump speed according to the medium viscosity

* In the choice of speed should also be based on experience, because of some other factors also affect the speed of choice, in the final determination of the above values ​​at the same time with the best manufacturers negotiate.

3. Single screw pump bushing rubber material selection:

Single screw pump bushing for rubber products, but also a single screw pump wearing parts, its choice is good or bad, directly affect the life of the bushing, under normal circumstances bushing life of 3-6 months, if used improperly The bushing may come off the pipe or be rubberized. So ask us to understand the basic characteristics of rubber and rubber adaptability to different media, according to our experience listed in Table IV, Table V.

Table 4: The basic characteristics of rubber

Table 5: Single screw pump bushing commonly used rubber

4. Material Selection:

Different types of media delivery, the need for different combinations of materials.

5 performance table:

General single screw pump performance charts or characteristic curves are 20C water as a medium (viscosity 1cst) when the data for the delivery of different viscosity flow and shaft power are different.

Shaft seal:

According to the needs and transportation medium, can adopt mechanical seal and packing seal two, and the two structures are interchangeable.

7. Pump drive mode:

As the single screw pump is a low-speed pump, the pump drive more, there are generally low-speed motor directly connected (6, 8), gear motor, stepless variable speed motor drive and so on.

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