Abstract: This article introduces product characteristics, core advantages, and standard assembly methods for cartridge mechanical seals, helping users improve installation quality.
Cartridge mechanical seals pre-assemble all components including the rotating ring, stationary ring, springs, auxiliary seals, gland, and sleeve into an integrated sealing unit. This design offers significant advantages.
Core Advantages of Cartridge Seals
- Easy Installation: Eliminates on-site measurement and compression adjustment, greatly reducing installation difficulty
- High Reliability: Pre-assembled and tested before shipment, avoiding on-site assembly errors
- Convenient Maintenance: Complete unit replacement shortens equipment downtime
- Precise Compression: Accurately controlled through positioning blocks, ensuring optimal working condition
Standard Assembly Methods
Cartridge bellows mechanical seal assembly must strictly follow these steps:
1. Gland and Bellows Assembly
Connect the gland and bellows using 6-12 bolts, with gaskets placed between them to prevent medium leakage.
2. Hard Ring Positioning
First, secure the fixing ring to the sleeve positioning counterbore, insert the gland and bellows assembly, and bring it into contact with the fixing ring. Place the hard ring, wedge ring, and rotating seat ring, determine the position, and slightly tighten the rotating ring set screws. Connect the rotating ring and hard ring with screws, then finally remove the fixing ring, gland, and bellows assembly.
3. End Face Alignment
When connecting the rotating seat ring and hard ring to the sleeve, ensure end face perpendicularity. Generally, end face runout should be less than 0.05mm. On the assembly platform, use a dial indicator for alignment while tightening connection screws to ensure perpendicularity requirements are met.
4. Compression Adjustment
The compression amount of cartridge seals is reflected through positioning block thickness. For adjustments:
- 45, 55 Series: To change compression, move the hard ring forward or backward on the sleeve; the movement amount equals the compression change value
- 60, 70, 85, 90, 120 Series: Moving the hard ring forward increases compression; moving it backward decreases compression