Peristaltic pump with 5-8m self-priming capacity, with the function of one-way valve, is widely used in water quality sampling instruments and online analysis instruments. This kind of product, which is called constant flow pump and peristaltic pump at the same time, can measure and sample accurately, and meet the requirements of water sampler and on-line analysis instrument for accurate collection and transportation of water samples, test reagents and other reagents.

Qili peristaltic pump can provide users with a full range of peristaltic pump products and supporting solutions, and can provide technical support and scheme suggestions for customers to quickly realize system development and integration, so as to save customers' development and application cycle and cost.

As a kind of high automation and unattended monitoring instrument, online analysis instrument and water quality sampling instrument usually require all matched original devices to ensure long-term stable and reliable operation, and can withstand high temperature, high temperature, organic solvent and other polluted environment. Therefore, the life, organic solvent resistance, high temperature resistance and climate resistance of peristaltic pump and related parts have very high requirements. Therefore, when the peristaltic pump is used in on-line analytical instruments and water quality samplers, the following matters should be paid attention to:

1. The materials and pipes of constant flow pump and peristaltic pump need to meet the requirements of relevant transportation, and the pump shell uses new solvent resistant materials.

2. The control system of constant current pump and peristaltic pump should be stable and reliable as far as possible, usually driven by stepper motor, but the common vibration point should be controlled to prevent excessive noise.

3. If the constant flow pump and peristaltic pump collect the sample liquid with a certain head and sampling time, and the working time is long, it is necessary to pay attention to use the pump pipe with thicker wall thickness, and make the pump work at a lower speed, so as to improve the service life of the pump pipe and reduce the frequency of maintenance and replacement.

4. In the early stage of system development and life test, it must be fully tested, because many peristaltic pumps can't see problems in the short term. Peristaltic pumps with poor materials and defective design can only find problems after long-term test.

5. The precision of constant flow pump and peristaltic pump has a certain relationship with the diameter of the matching pump pipe and the rotation speed. Generally, when the rotation speed is higher, the frequency of pulse will increase, but the peak value of pulse will decrease, and the natural period transportation will be more stable. Therefore, if there is a need for conveying smoothness, the relationship between the increase of speed and the decrease of pump pipe life should be considered and balanced.