The operational reliability of large industrial pumps hinges on a seemingly insignificant component: the mechanical seal. Seal failure ranks among the most prevalent malfunctions of industrial pumps. Any seal leakage not only triggers unplanned downtime, but also incurs substantial maintenance costs and risks loss of process media. Seal flushing represents one of the most proven methods to extend mechanical seal service life.Core principle of seal flushing: Fluid is pumped into the seal chamber either from the pump discharge or an external clean supply to clean and cool the seal faces.
Cleaning: Wash away abrasive debris, crystalline particles and deposits on the seal faces to avert abrasive wear damage.
Cooling: Dissipate heat generated by friction at the sealing faces, preventing thermal cracking and premature aging of O-rings.
There are two primary flushing configurations: recirculating a portion of fluid from the pump outlet, or feeding an external clean flushing medium. Regardless of the setup, both present the same engineering hurdle: the required flushing pressure and flow rate rarely match the parameters directly available at the pump discharge.
This creates the need for a compact auxiliary pump to boost pressure and precisely regulate flow — an application where JONSN micro gear pumps are the ideal solution.
Why Micro Gear Pumps?
①Pulse-Free Delivery：Thanks to the inherent constant displacement property of gear pumps, flow fluctuation is nearly eliminated.
②Precise Flow Control：Strict linear correlation between rotational speed and displacement delivers accurate, dependable flow regulation.
③Broad Chemical Compatibility：Optional wetted materials including 316L stainless steel, Hastelloy and PEEK cover most common process media.
④Wide Operating Temperature Range：Customizable versions suit working conditions from low temperature up to over 350°C.
Among all available models, the JONSN MRE Series is engineered exclusively for demanding continuous working conditions such as mechanical seal flushing, featuring three distinctive competitive edges:
Magnetic Drive with Zero Leakage Construction：The MRE Series adopts a leak-free magnetic coupling structure, eliminating the risk of shaft seal leakage inherent to conventional pumps with mechanical seals. The fundamental purpose of seal flushing is to protect the mechanical seal of large industrial pumps. It would be contradictory if the flushing pump itself suffers fluid leakage — the MRE design resolves this contradiction at the source.
Stable Output Across a Wide Flow Range：Compared with standard micro gear pumps, the MRE Series maintains steady performance under elevated temperatures and broader flow rates. More importantly, outlet flow remains consistent even after moderate internal component wear. For continuous flushing service, this prevents insufficient lubrication on seal faces caused by declining flow volume.
Smooth Pulse-Free Fluid Transfer：As positive displacement devices, gear pumps endow the MRE Series with naturally pulseless flow. The flushing liquid evenly blankets the seal faces, avoiding edge-loaded abrasion of sealing surfaces induced by turbulent impact.
If your industrial pumps suffer frequent mechanical seal replacement and persistent leakage, the root cause is likely inadequate flushing conditions rather than defective seals themselves. A single MRE magnetic gear pump offers the most cost-effective solution to extend mechanical seal service life.
