LN series laboratory plunger pumps

LN series laboratory plunger pumps are intended for the continuous process of liquid pumping without pressure fluctuations. The pump has two plungers and provides accurate and continuous liquid flow rate for any period of time.

Continuous flow is achieved due to a control cycle where the liquid is fluently put from one cylinder or another without any fluctuations in flow rate or pressure. The pump allows constant-flow or constant-pressure pumping. There is also a reverse mode available to pump the liquid out of the system in case of pressure build up.

During fluid supply, the pumped volume is precisely measured, which allows using the pump for accurate fluid dosing. Wetted parts of the pump can be made of chemically resistant materials to work with aggressive solutions.

The pump is controlled from a touch screen on the front panel of the instrument. Also, the pump can be connected to a PC to control the operating modes using software supplied with the pump. In this case, pressure and flow rate data will be communicated for viewing directly to the display of the PC.

Main operating modes of the pumps:

• Constant flow rate
• Constant pressure
• Constant pressure difference by an external differential pressure gauge
• Programmed cycles with changing a specified parameter (changing pressure/flow rate by a given value within a given time)

Laboratory plunger pumps are used in R&D systems in oil and chemical industry, e.g:

• Pumping fluids through core samples in experiments to determine reservoir properties of core samples;
• Applying backpressure;
• Pumping solutions through proppant packs;
• Maintaining rock pressure in coreholders;
• Dosing of chemicals.