PG 1.0 Centrifugal Pumps with Mechanical Seal

ADVANTAGES:

• Highly suitable for applications where metal pumps are subject to corrosion
• Interchangeable with metal pumps thanks to standardized connections
• All components are machined from solid plastic
• No metal parts in contact with the pumped liquid – extremely corrosion-resistant
• No injection molding or welded joints – stress cracking eliminated
• Maximum chemical resistance
• Unique hydraulic design for plastic pumps
• Smooth and quiet operation
• Higher efficiency – lower energy consumption
• Lower NPSHr – improved suction performance
• Reduced risk of clogging

CONSTRUCTION: All wetted parts are manufactured from solid plastic materials. Thanks to a special production method and the absence of welded joints, there is no risk of chemical stress cracking, providing a significant advantage over injection-molded pumps. The pump shaft is protected by a replaceable plastic shaft sleeve, ensuring that the pumped liquid never comes into contact with metal components. Seals are supplied as standard in EPDM but are also available in Viton or PTFE-lined versions.

MECHANICAL SHAFT SEAL: Without question, the most critical component of a centrifugal pump is the rotating shaft seal. For this reason, ARBO pays special attention to the development of this component. ARBO manufactures a wide range of single and double mechanical seals for system pressures from 1.5 to 10 bar, with or without a complete seal flushing system. In addition to our own high-quality designs, standardized mechanical seals can also be installed without significant modifications to the pump construction.

MAINTENANCE: Thanks to the back pull-out design, the suction and discharge pipework does not need to be disconnected during maintenance. Routine maintenance is limited to occasional cleaning of the pump and replacement of the mechanical seal and motor bearings. Under normal operating conditions, a service life of 30,000 operating hours is not uncommon. This makes the pump virtually maintenance-free. In short, this is a highly versatile pump which, together with the available options, provides a solution for almost any medium up to a temperature of 140°C.

DRY RUNNING: Naturally, a centrifugal pump is not designed to operate without liquid. However, this may occasionally occur in practice. Thanks to its well-engineered design, such an event will result in only minimal damage. The relatively expensive impeller and all other casing components are fully protected. Only the mechanical seal and the shaft sleeve will eventually fail after prolonged dry running, and both can be replaced easily at minimal cost.

SELF-PRIMING VERSIONS: Centrifugal pumps are normally non-self-priming.

This means they must be installed so that the liquid flows naturally into the pump. Self-priming capability can be achieved by using special priming chambers installed in the pump suction line.

DESIGNS: