Verderflex Peristaltic Hose Pump - Basic Design

The VERDERFLEX peristaltic hose pump design makes the pump unique in its function. This results in a wide range of application areas where excessive demands to the pump system are required.

Materials of Construction

Pump Housing - Cast iron
Rotor - Cast iron
Rotor Shoes - Aluminum
Inserts - Stainless Steel, PP, PVDF
Flanges - Mild Steel ANSI 150
Base Plate - Carbon Steel
Bearing Cartridge - Cast iron with high tensile shaft
Lubricant - Specially designed mixture
Hose - NR, NBR, EPDM and CSM

Verderflex Hose

The hose is the heart and soul of a peristaltic pump. The successful use of hose pumps in a number of industrial fields led VERDERFLEX to develop a hose with a special construction. Hoses in some peristaltic pumps could fail due to fatigue between the rubber layers and the rein force ment. However, VERDERFLEX successfully developed a hose designed to postpone fatigue within its construction, resulting in extremely long service life of the hose. Internal diameter of the hose and rotor speed determine the flow rate of the pump. Hose wall thickness compared to its diameter and the number of reinforcement layers are responsible for the restoration forces of the hose after compression and creates a virtual vacuum in the hose. The construction of the textile reinforcement allows a discharge pressure of the pump of 230 PSI/ 16 bar for all pump types.

Some industrial hoses in today’s market have machined exteriors, a process generally employed by others to achieve an equal wall thickness. In comparison, the unique VERDERFLEX production process is so precise that the exact wall thickness tolerance is maintained at each and every point. For this reason VERDERFLEX hoses do not have to undergo this additional process of external machining. Thus, when VERDERFLEX hoses are tested alongside their competitors, results indicate that there is no additional friction loss due to the wound surface, but that the VERDERFLEX hose remains homogeneous and has no other surface area liable to contamination. All VERDERFLEX hoses have a color lettering on the exterior which indicates the type of hose. The VERDERFLEX lettering is white for a NR hose, in yellow for a NBR and in red for a EPDM hose type.

Ability to Pump Viscous Fluids

The hose restitution after the squeeze produces an almost full vacuum that draws the product in the hose, so very viscous liquids are pumped without problems using the VERDERFLEX hose pump. The pump casing is half-filled with specially designed VERDERLUBE to lubricate and cool the pump and to lengthen the service life of the hose. Since the product only comes in contact with the hose and not with any rotating parts, the hose pump is very suitable for abrasive and corrosive applications.

Pump Sizing Chart

Below you will find sizing information for the entire VERDERFLEX product group. Should you have any additional questions please contact us.

Technical Hose Data

Dimensions of the VERDERFLEX hose are nominal and allow it to be fitted to most brands of hose pumps in the market.