Mechanical seals,as critical components in rotary pump equipment,their effectiveness directly impacts the stability and safety of equipment operation.However,in practical applications,leakage problems are common.The reasons mainly focus on the following aspects:

First,the wear of the dynamic and static ring end faces is a common factor leading to leakage.The two fit closely together under spring pressure to form a seal,but as operating time accumulates,the friction pair gradually wears down,seal performance declines,and leakage eventually occurs.Especially under conditions of poor lubrication or media containing impurities,the wear rate accelerates significantly.

Secondly,process fluctuations and poor installation quality.Phenomena such as vibration,cavitation,and media flow interruption during equipment operation can destroy the lubricating film between the seal faces,causing the seal to operate in a dry friction state,with a sharp temperature rise,leading to seal ring burn-out or thermal shock cracks.Furthermore,oversights during installation,such as spring misalignment,insufficient tightening,and seal ring tilting,can all create potential leakage hazards.

Third,the aging and corrosion of seal rings.If the seal ring undergoes a chemical reaction with the medium,or remains in a high-temperature,corrosive environment for a long time,it is prone to deformation,hardening,or even rupture,losing its sealing function.

Finally,design and selection errors can also lead to early seal failure.Different medium characteristics have specific requirements for seal material,structure,and face pressure.If not selected appropriately based on actual working conditions,it is very easy to cause seal incompatibility and leakage.

How to solve it?

First,Precise Selection.Comprehensively consider the medium properties,temperature,pressure,and equipment operating parameters to select the matching seal type and material,avoiding a"one-size-fits-all"design approach.

Second,Precise Assembly.During installation,strictly control the spring compression,seal ring tightness,and shaft sleeve fit clearance to ensure good alignment and proper lubrication of all components.Especially for cartridge or bellows-type seals,the factory settings should be followed to avoid risks associated with on-site readjustment.

Third,Standardized Operation and Maintenance.Strengthen process control to prevent frequent equipment start-stops or sudden load changes;regularly inspect the seal system's flushing and cooling conditions to ensure smooth lubrication;when minor leakage occurs,first investigate the operating conditions and seal status,and avoid disassembly unless necessary to extend the effective service life of the seal.

Have you grasped these techniques?

Bonve always adheres to the philosophy of "Wholeheartedly Making Good Rotor Pumps," committed to providing global customers with customized conveying and mixing solutions. If you have technical inquiries, selection needs, case references, or other cooperation intentions related to Bonve rotor pumps, please feel free to contact us.  

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We look forward to working with you to drive efficiency and innovation in industrial fluid transmission with precision technology.