Preventing Failure: Labyrinth Seal Ring (DTPD60UZ016) vs. Graphite Seal Ring in Induced Draft Fan Sealing Systems

In the maintenance of Induced Draft (ID) fan sealing systems, confusing the functions of the Labyrinth Seal Ring (also known as a Stacked Laminate Seal Ring) and the Graphite Seal Ring often leads to critical failures such as sealing loss, premature bearing wear, and equipment downtime. This article combines practical maintenance experience with the requirements of GB/T 1236-2017 《Industrial Fan - Performance Testing》 standard, detailing the core value of the DTPD60UZ016 Labyrinth Seal Ring, comparing the key differences between the two components,

I. Core Functionality of the DTPD60UZ016 Labyrinth Seal Ring

1.1 Bidirectional Oil and Dust Isolation: Fortifying the Sealing Defense

As a critical sealing component in the ID fan bearing housing, the core function of the DTPD60UZ016 is "bidirectional isolation":

• Internal Protection: It prevents the leakage of lubricating oil caused by the high-speed rotation of the main shaft, avoiding oil waste and contamination of the fan casing.
• External Protection: It blocks external dust, corrosive flue gas, and contaminants from entering the bearing oil, thereby preserving lubrication quality and extending bearing service life. This fully aligns with the GB/T 1236-2017 requirement that "the sealing system must continuously block the intrusion of impurities."

1.2 Structural Design Adapted to High-Duty Conditions

The seal ring features a multi-layer stainless steel laminate design, with a pre-reserved 0.2mm elastic rebound margin at the edge of each layer. This design ensures a tight fit against the shaft surface, even with a radial runout, boosting sealing reliability by over 30% compared to standard products.

Its excellent oil resistance and wear resistance allow for a service life exceeding 8,000 hours in lubricating oil immersion environments, making it precisely suited for the harsh, high-dust, and high-temperature operating conditions of ID fans.

II. Key Differences: Labyrinth Seal Ring vs. Graphite Seal Ring

2.1 Sealing Target and Installation Scenario

2.2 Operating Condition Adaptation and Performance Emphasis

• DTPD60UZ016 Labyrinth Seal Ring: Stronger oil resistance and wear resistance. Ideal for dynamic sealing scenarios in the bearing housing that involve prolonged contact with oil.
• Graphite Seal Ring:. Exceptional gas sealing performance. Suitable for the flue gas side sealing where temperature fluctuations are common, but prone to aging with prolonged exposure to lubricating oil.

Conclusion: Both seals must be used in conjunction to form a "Oil/Dust + Gas" dual-barrier sealing system, meeting the GB/T 1236-2017 requirement for "multi-stage protection."

III.  Comprehensive Sealing Solutions

3.1 Core Sealing Support Products

In addition to the DTPD60UZ016 Labyrinth Seal Ring, Huakaishengrui offers a complete sealing solution, including:

• Oil Scraper Ring I TY9102C
• Double Combined Seal Ring II DTYD100TY005 (Enhanced Shaft System Sealing)
• Static Sealing Products (e.g., Seal Ring UYG35\20G01)
• Modular Accessories (e.g., Spacer Rings, Bearing Housings) to facilitate rapid overhaul and maintenance.

3.2 New Full-Range Compatibility Products

To cover a wider range of operating conditions, the company is simultaneously launching the following complementary products:

HKZX-2025-10-27