Almatec Biocor Diaphragm Pump

Working Principle

The Biocor series is based on the functional principle of double diaphragm pumps. The basic configuration consists of two external pump housings with a center block between them. Each pump housing contains a product chamber that is separated from the center block by a diaphragm. Both diaphragms are interconnected by a piston rod. Controlled by an air control system, they are alternately subjected to compressed air so that they move back and forth.

In Fig. 1 the compressed air has forced the left diaphragm towards the product chamber and displaced the liquid from that chamber through the open valve at the top to the discharge port. Liquid is simultaneously drawn in by the right diaphragm, thus refilling the second product chamber. When the end of the stroke is reached, it reverses automatically, and the cycle is repeated in the opposite direction.

In the Fig. 2 liquid is drawn in by the left-hand diaphragm and displaced by the right-hand diaphragm. The liquid is displaced, and thus conveyed, by the compressed air. The diaphragms merely serve as barriers and are not pressurized, which greatly increases the service life of the diaphragms.

Materials

Connections

The suction and discharge ports are suitable for Tri-Clamp® or other sanitary threads (Naue, Neumo, DIN 11851, DIN 11864).

Biocor Features

• Integrated cleaning system with high cleaning results
• CIP (clean-in-place) and SIP (sterilization-in-place) options
• Smooth diaphragms without disc and seals
• Gentle displacement
• Proof against dry running
• Self-priming

Gentle Handling

Always a demand for sterile applications, all Biocor pumps have no horizontal areas in the housing parts. Each pump comes with four ball lifting magnets, which can be attached to the pump housing from the outside at the location of the four ball valves. The ball valves are raised up magnetically out of their seats, and the pump is drained entirely without having to be dismounted. There are no mechanical ball lifters with parts and seals in the wetted area. Since there are no rotating parts or shaft seals in the product chamber, the pump provides gentle displacement, making it suitable for applications that require extremely gentle handling.

active Pulsation Dampers

Due to their design, pumps with oscillating action produce a pulsating flow. Although the double-acting design of Almatec pumps and the direct pneumatic drive greatly reduce the pulsation, a pulsation damper must still be installed on the discharge side in order to obtain a virtually uniform flow.

The dampers are self-regulating. As with Almatec pumps, the diaphragm merely serves as a barrier between product and air chamber and is, therefore, always without pressure. If the pressure on the product side drops due to changes in the operating conditions, the pressure on the other side of the diaphragm will decline accordingly. As soon as the pressure on the product side rises, the pressure on the other side will increase as well. This automatic adjustment optimizes the diaphragm setting and ensures a consistently good damping effect.