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KLE | Mechanical Seal Maintenance & Repair Process - John Crane Workshop
JOHN CRANE WORKSHOP | KLE

Maintenance & Repair Process
Mechanical Seal

The Mechanical Seal maintenance and repair process at the John Crane Workshop is carried out through strictly controlled technical stages to ensure sealing integrity and operational reliability after refurbishment.
Each stage is organized into key process groups for easier monitoring while fully reflecting the actual technical workflow implemented by KLE engineers.
OVERALL WORKFLOW – JOHN CRANE WORKSHOP
John Crane Mechanical Seal Workflow

TECHNICAL PROCESS

Mechanical Seal Disassembly
STEP 01

DISASSEMBLY

KLE engineers carefully disassemble the complete mechanical seal assembly to support detailed inspection and refurbishment. The procedure follows the required technical sequence to prevent secondary damage to individual components.
Ultrasonic Cleaning
STEP 02

ULTRASONIC WASHING

All components are cleaned using ultrasonic equipment and specialized cleaning solutions to remove oil residue, deposits, and contaminants from surfaces and narrow internal gaps that conventional methods cannot fully reach.
Inspection and Reporting
STEP 03

INSPECTION & REPORTING

After cleaning, each component is inspected and its actual condition is recorded, including seal faces, O-rings, springs, and other critical parts. The findings are compiled into a technical report for condition assessment and repair recommendations.
Lapping Seal Face and Seat
STEP 04

LAPPING FACE & SEAT

The sealing faces are reconditioned using specialized lapping equipment to restore the required flatness and surface finish, ensuring reliable sealing performance.
Lightband Flatness Measurement
STEP 05

MEASURING LIGHTBAND

An optical flat and monochromatic light are used to inspect surface flatness through Lightband measurement. The results confirm machining accuracy and the final condition of the sealing faces.
Optical Lightband Measurement
Mechanical Seal Assembly
STEP 06

SEAL ASSEMBLY

Qualified components are reassembled in a controlled clean environment. The assembly process ensures the required tolerances, installation dimensions, and concentric alignment in accordance with technical standards.
API 682 Leak Test
STEP 07

SEAL LEAK TEST

After assembly, the seal undergoes a static air-pressure leak test using specialized equipment. The results must remain within the allowable limits of API 682 before the seal proceeds to the next stage.
API 682 compliant
Mechanical Seal Packing
STEP 08

PACKING

The seal is packed under controlled conditions to protect it from impact and preserve the sealing surfaces during transportation. Each unit is delivered with the corresponding technical report.