Peristaltic Pumps

LAMBDA PRECIFLOW, MULTIFLOW, HIFLOW, MAXIFLOW and MEGAFLOW peristaltic pumps have been developed for continuous cultures as the result of twenty years of laboratory experience and involved the systematic elimination of the imperfections found in other pumps on the market.

Flow rates from 0.01 to 10000 ml/hour
Digital speed setting from 0 to 999
New motor technology
Extensive remote controls
Greatly extended tubing life and decreased pulsation
Flow rate programming (up to 99 steps)
By programming zero flow rates the pump can be switched on and off without using a timer
Very economic in use while using low cost tubing without stoppers
Most compact pump of its class on the market
Access to reaction kinetics by using the LAMBDA pump-flow INTEGRATOR
Low voltage plug-in power supply for maximum safety
RS-485 interface (optional)
Control software PNet (optional)

The special mechanics of LAMBDA peristaltic pumps has been developed because no pump could be used for continuous fermentation lasting up to eight weeks.

The most frequent problems of traditional peristaltic pumps are:

Aspiration of the tubing by the mechanics
Rupture of the tubing and leaking of the solution
Flow rate decrease over time
When a continuous process is interrupted a lot of time and money are lost

During the development of the new LAMBDA peristaltic pump mechanics all aspects of existing peristaltic pumps have been analyzed and finally an efficient solution has been found.

What makes these new pumps so efficient?

Rollers of small diameter apply a high strain onto the tubing and push the tubing in the direction of the sense of rotation. Therefore, the tubing has to be fitted with stoppers. We use rollers of very large diameter – this leads to the elimination of such strains and prevents tubing motion. A larger portion of tubing is compressed with better pressure distribution. The elasticity of the tubing is protected.

Instead of rollers we use special plastic ball bearings with glass beads. The gliding of such rollers requires only a minimal force and the corrosion resistance in the case of spill is excellent.

A special off-centre lever using a spring of non-corrosive material applies the compression force on the tubing softly and gradually.

The final pressure of the liquid is reduced by the spring to 0.1–0.2 MPa (according to the tubing used). The pressure does not increase even when the line is blocked.

The pump head is large and has two centers of asymmetry, which reduces pulsation several times. The head is made of hard, chemically stabilized material.

The stepping motor or BLDC motor, driven by quartz-controlled electronics, assures a high precision of the flow rate. The ratio of speed control is 1:1000.

Several possibilities of remote control.

The unique flow integrator LAMBDA INTEGRATOR makes the LAMBDA peristaltic pumps excellent for the use in automatically controlled systems e.g. fermentation, bio cultures, chemical synthesis, fraction collection and many more.

The laboratory space is very expensive, therefore we have made our peristaltic pumps as compact as possible (all have just 1 l of volume). They are several times smaller than other peristaltic pumps on the market and therefore so handy in use.

Benefits of great importance for your laboratory

Since the lateral forces on the tubing have been eliminated, no stoppers are required. Even without any fixation the tubing will not move at all in and out of the head.

Since the tubing compression is kept in the range of elasticity of the tubing the tubing life increases considerably and flow rates remain constant.

Low cost tubing can be used with good results. The tubing economy is very important, e.g. the LAMBDA PRECIFLOW peristaltic pump will be paid back after consumption of about 80 m of tubing.

PROPERTIES OF LAMBDA PERISTALTIC PUMPS

	PRECIFLOW	MULTIFLOW	HIFLOW	MAXIFLOW	MEGAFLOW
Flowrate (ml/h)*	0-600	0-600	0-3'000	0-10'000	0-60'000
Programming	No	up to 99 steps	up to 99 steps	up to 99 steps	up to 99 steps
Motor	Stepping motor	Stepping motor	BLDC	BLDC	BLDC
Power (max. W)	5	5	30	30	50
Weight (kg)	1	1	1.2	1.2	2.5
Warranty	5 years	5 years	2 years	2 years	2 years