Size

Custom

Other Attributes

Place of Origin	Zhejiang, China
Brand Name	CF
Model Number	W01

Supply Ability

Supply Ability

10000 Piece/Pieces per Month

Product Details

1) Heat shock stablity

2) chemical corrosion-resistant

3) High temper-endure(up to 1650°)

4) Wearing/corrosion/oxidation resistant

5) Highly performance of mechanical strength

6) Cleaning or etching the hardest sub-surfaces

7) Used for grinding, lapping, and wire saw cutting as well as abrasive blasting

Material And Component Codes

Description	Material	Material Feature & Suitable Scope
Rotary /Stationary Face	Carbon	Resistant against: erosive heat. suitable for water and oil medium.
	Ceramic	Resistant against:shore hardness,abrasion. Suitable for dusted water and oil.
	Silicon Carbide	Resistant against:heat,abrasion,erosive. Suitable for industrial pumps, submersible pump sewage pump etc
	Tungsten carbide	Resistant against:heat,abrasion,erosive. Suitable for industrial pumps, submersible pump sewage pump etc
Bellow Cup gasket Oring	NBR	Resistant against:pressure,abrasion,high elasticity and mechanical strength. Suitable for water and Oil Under -20°C-120°C
	EPDM	Resistant against:heat freeze,chemical reagent depending. Suitable for water and Oil Under -40°C-150°C
	MVQ	Resistant against:heat, oil, reagent, medicine, acetone.Suitable for high temperature. Hydraulic equipment and vacum equipment Suitable for erosive medium under  -20°C-180°C
	ECO	Resistant against:ozone aging merely ocetum, ammomia ethanol. Suitable for medium -40°C-150°C
	SUS304 SUS316	Resistant against: freon, rock oil. Suitable for medium -30°C-130°C
Retainer driver ring\spring Spring seat	SUS304 SUS316	Resistant against: abrasion, antirust of feature

How to choose What you want

Let me Help you find it what mechanical seal do you want

The First step: Do you know Type name?  you can choose from the list below.

The Second Step: Do you know what material do you want? Choose from the list below.

The Third step: Do you know what shaft size?

If you don’t know any, please do not hesitate to ask us, we will help you to find out the best way.

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Why Choose Us

The Complete Guide to Cartridge Type Mechanical Seals: Design, Application & Maintenance

1. Introduction to Cartridge Type Mechanical Seals

The cartridge type mechanical seal is a pre-assembled, self-contained sealing solution designed for reliability and ease of installation. Unlike traditional component seals, which require precise manual assembly, cartridge type mechanical seals integrate all critical components—seal faces, springs, O-rings, and gland plates—into a single unit. This innovation significantly reduces installation errors and downtime, making them ideal for industries where operational efficiency is critical.

Key advantages of cartridge type mechanical seals:
✔ Plug-and-play installation – No need for complex measurements or adjustments.
✔ Reduced maintenance time – Seal replacement takes minutes instead of hours.
✔ Enhanced reliability – Factory-balanced components ensure optimal performance.
✔ Wide compatibility – Fits most pump models with standardized dimensions.

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2. Design & Working Principle

2.1 Core Components

A cartridge type mechanical seal consists of:

• Primary sealing faces (rotating & stationary rings) – Typically made of silicon carbide (SiC), tungsten carbide (WC), or carbon.

• Secondary seals (O-rings, gaskets) – Usually EPDM, FKM, or PTFE for chemical resistance.

• Spring mechanism – Maintains consistent face pressure under varying conditions.

• Metal housing – Constructed from stainless steel (316L, 304) or exotic alloys for corrosive environments.

2.2 How It Works

The cartridge type mechanical seal operates by creating a thin lubricating film between the rotating and stationary faces. This film prevents leakage while minimizing friction. The spring system compensates for minor shaft misalignment and wear, ensuring long-term sealing integrity.

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3. Key Benefits Over Conventional Seals

Case Study: A chemical plant reduced pump downtime by 70% after switching to cartridge type mechanical seals, thanks to their quick-change design.

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4. Material Selection for Different Applications

Choosing the right materials is crucial for cartridge type mechanical seal performance:

4.1 Seal Face Materials

• Silicon Carbide (SiC) – Best for abrasive fluids (slurries, wastewater).

• Tungsten Carbide (WC) – Ideal for high-pressure applications (>20 bar).

• Carbon Graphite – Used in non-lubricating media (LNG, solvents).

4.2 Elastomers & Metals

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5. Installation Best Practices

5.1 Step-by-Step Installation

1. Pre-Installation Check

• Verify pump shaft cleanliness and smoothness.

• Ensure the cartridge type mechanical seal matches pump specifications.

2. Mounting the Seal

• Slide the cartridge unit onto the shaft.

• Secure with bolts (follow torque specs from the manual).

3. Final Adjustments

• Remove shipping clips (critical step!).

• Hand-rotate the shaft to check for binding.

5.2 Common Installation Mistakes

• Error: Forgetting to remove the anti-rotation clip → Seal failure within hours.

• Solution: Always inspect the seal before startup.

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6. Maintenance & Troubleshooting

6.1 Preventive Maintenance

• Monthly Checks: Monitor leakage, vibration, and temperature.

• Annual Inspection: Replace if leakage exceeds 10 ml/h or faces show wear.

6.2 Failure Analysis

Pro Tip: Keep a spare cartridge type mechanical seal in stock to minimize downtime.

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7. Top Industry Applications

7.1 Chemical Processing

• Challenge: Aggressive acids/bases degrade seals.

• Solution: PTFE-encapsulated cartridge type mechanical seals with Hastelloy components.

7.2 Oil & Gas (Pump Jacks, Pipeline Boosts)

• Challenge: High pressure + abrasive particles.

• Solution: Tungsten carbide faces with API Plan 32 flush.

7.3 Water Treatment Plants

• Challenge: Sewage with suspended solids.

• Solution: SiC-faced seals with external flush ports.

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8. Why Choose Cartridge Type Mechanical Seals?

• Cost Savings: Reduced labor and downtime.

• Safety: Lower leakage risk vs. component seals.

• Longevity: Precision engineering extends service life.

Final Recommendation: For industries prioritizing reliability and ease of maintenance, cartridge type mechanical seals deliver unmatched performance. Request a free seal selection guide to find the optimal model for your application.

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Common Questions About Cartridge Type Mechanical Seals (With Expert Responses)

1. Q: What is a cartridge type mechanical seal, and how does it differ from a component seal?

A: A cartridge type mechanical seal is a pre-assembled, self-contained unit that includes all sealing components (faces, springs, O-rings) in a single housing. Unlike component seals (which require manual assembly), cartridge type mechanical seals allow for quick, error-free installation—reducing downtime by up to 90%.

2. Q: What are the main advantages of using a cartridge type mechanical seal?

A: Key benefits include:

✔ Faster installation (no need for precise spring adjustment)

✔ Reduced leakage risk (factory-tested for optimal performance)

✔ Lower maintenance costs (replace the entire unit instead of individual parts)

✔ Compatibility with most pump models (ISO, DIN, and ANSI standards)

3. Q: How long does a cartridge type mechanical seal typically last?

A: Service life depends on the application:

• Clean water: 3-5 years

• Abrasive/slurry pumps: 1-2 years (recommend SiC/SiC faces)

• Chemical processing: 2-3 years (with PTFE or FFKM elastomers)

4. Q: Can a cartridge type mechanical seal handle high-pressure applications?

A: Yes! Standard cartridge type mechanical seals withstand up to 25 bar (360 psi). For higher pressures (e.g., boiler feed pumps), we offer balanced seals with tungsten carbide (WC) faces.

5. Q: Is special training required to install a cartridge type mechanical seal?

A: No—the cartridge type mechanical seal is designed for easy installation. Basic mechanical skills are sufficient. We provide step-by-step guides and videos to ensure proper mounting.

6. Q: How do I know if my pump is compatible with a cartridge type mechanical seal?

A: Share your pump’s:

• Shaft diameter

• Seal chamber dimensions

• Flange type (e.g., ISO, DIN)

We’ll verify compatibility or recommend an adapter sleeve.

7. Q: What materials are best for corrosive fluids (e.g., acids, seawater)?

A: For harsh media:

• Seal faces: Silicon carbide (SiC) or tungsten carbide (WC)

• Elastomers: FFKM (for acids) or EPDM (for seawater)

• Metal parts: Hastelloy or super duplex stainless steel

8. Q: Why is my new cartridge type mechanical seal leaking after installation?

A: Common causes:

• Forgot to remove shipping clips (blocks spring compression)

• Incorrect rotation direction (check pump vs. seal markings)

• Damaged O-rings during installation (always lubricate before fitting)

9. Q: Can I reuse a cartridge type mechanical seal after removal?

A: Not recommended. Once disassembled, the seal’s integrity may be compromised. Always replace with a new unit for reliable performance.

10. Q: How often should I inspect my cartridge type mechanical seal?

A: Recommended intervals:

• Clean water: Annual inspection

• Abrasive/chemical service: Every 6 months

Check for leaks, unusual noise, or excessive heat.

11. Q: What’s the best way to store spare cartridge type mechanical seals?

A: Store in a cool, dry place, away from direct sunlight. Keep O-rings lubricated with silicone grease to prevent drying.

12. Q: Can a cartridge type mechanical seal run dry temporarily?

A: No! Dry running for even 5 minutes can destroy seal faces. Always ensure proper lubrication (liquid or external flush).

13. Q: How do I troubleshoot excessive vibration in a pump with a cartridge type mechanical seal?

A: Vibration may indicate:

• Misalignment (check shaft runout—should be ≤0.05mm)

• Worn bearings (replace before installing a new seal)

• Cavitation (verify NPSH and fluid supply)

14. Q: Are cartridge type mechanical seals suitable for food-grade applications?

A: Yes! We offer FDA-compliant seals with:

• Ceramic/alumina faces

• Medical-grade EPDM or silicone O-rings

• NSF H1-certified lubricants

15. Q: What’s the ROI of switching to cartridge type mechanical seals?

A: Case studies show:

• 50% faster seal changes = less downtime

• 30% longer seal life = fewer replacements

• Payback period: Typically <12 months

Key Takeaways for Clients

• Cartridge type mechanical seals simplify maintenance and improve reliability.

• Proper material selection (e.g., SiC for abrasives, FFKM for acids) maximizes lifespan.

• Always remove shipping clips and verify rotation direction during installation.

Need a Custom Solution? → Share your pump specs, and we’ll recommend the ideal cartridge type mechanical seal for your needs.