Product Overview

The Carbon Seal Ring 300MG41.11.06.98 is a precision-engineered component manufactured from antimony-impregnated graphite. Serving as the core of the shaft-end sealing system for ZGM medium-speed roller pulverizers, it is specifically designed to withstand the harsh environments of pulverized coal, hot air, high temperatures, and frequent start-stop cycles. It is an indispensable consumable sealing part used extensively in the fuel preparation systems of thermal power plants.

Customized strictly to the structural and installation dimensions of the ZGM series, this seal ring is compatible with lubricating oil and grease mediums. It provides a floating dynamic seal that effectively blocks coal dust and impurities from entering the oil chamber while maintaining a micro-leakage lubrication film to protect the roller bearings and shafting.

Technical Features & Advantages

• Antimony-Impregnated Graphite Material: The high-purity graphite base is treated via a vacuum pressure antimony impregnation process. This allows for a continuous operating temperature of 300°C to 400°C and provides superior thermal shock resistance, preventing cracking or deformation during rapid temperature fluctuations.

• Self-Lubricating & Wear Resistant: The antimony structure significantly enhances the strength and hardness of the graphite. Its low friction coefficient and excellent self-lubricating properties allow it to resist abrasive wear from coal particles even in high-speed, high-dust conditions.

• High Sealing Precision: The sealing end-face is precision-ground to achieve high flatness and smoothness. This ensures a stable pressure differential across the seal while strictly controlling leakage within industrial standards to prevent both dry friction and excessive seepage.

• Floating Design: The radial self-adaptive floating structure automatically compensates for shaft eccentricity, runout, and installation errors. This prevents scratching of the main shaft journal and reduces rework rates during maintenance, fully complying with ZGM maintenance specifications.

Component Synergy & Compatibility

The 300MG41.11.06.98 works in tandem with other ZGM pulverizer sealing and transmission parts to form a multi-stage protection system.

Complementary Spare Parts Synergy Table

Application Scenarios

This seal ring is primarily used on the roller shaft ends, transmission discs, or sealing chambers of ZGM80, ZGM95, ZGM113, and ZGM123 pulverizers.

1. Routine Inspection & Minor Maintenance

Involves checking the fit, spring pre-load, and floating flexibility of the ring. Surfaces are cleaned of coal dust and carbon deposits. The ring is replaced immediately if wear, jamming, or cracks are detected.

2. Quarterly & Semi-Annual Maintenance

A detailed disassembly is performed to inspect the wear volume, flatness of the sealing face, and integrity of the antimony layer. Concurrently, the seal air pipes and support rings are checked to ensure the entire system is in optimal condition.

HKZX-2026-02-28