20mm 22mm Carbon/Graphite Cartridge Mechanical Seal

20mm 22mm Carbon/Graphite Cartridge Mechanical Seal

The robust graphite cartridge mechanical seal features a stationary cartridge design, it is a direct, high-performance replacement for OEM seals in water, chemical, and general industrial pumps. 

Model:300Q
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Key Features


• Premium Material Construction: The primary sealing faces are manufactured from high-grade carbon/graphite, providing excellent self-lubricating properties, low friction, and outstanding wear resistance. This ensures extended service life and stable sealing performance even under challenging conditions.

• Cartridge Design: The fully pre-assembled cartridge configuration eliminates the need for complex on-site measurements and adjustments. It ensures precise compression of the seal faces, reducing installation errors and minimizing the risk of premature failure.

• Versatile Compatibility: Available in both 20mm and 22mm shaft sizes, this graphite mechanical seal is compatible with a wide variety of pumps, mixers, and agitators used in chemical processing, water treatment, food and beverage, and general industrial applications.

•Robust and Durable: Engineered to withstand moderate pressure and temperature variations, the carbon mechanical seal is designed for long-term, maintenance-free operation, reducing downtime and lowering total cost of ownership.

• Easy Retrofit: The cartridge design allows for quick and straightforward replacement of existing seals, making it an ideal choice for both new equipment and aftermarket upgrades.




Technical Specs

Materials

Mediums

Chemical, Food, Oil, Petroleum, Pharmaceuticals Paper and pulp, Sewage treatment

Stationary Ring

Carbon/Sic/Ssic/TC

Temperature

Elastomer Dependent

Rotary Ring

Sic/Ssic/TC

Pressure

≤2.8MPa

Secondary Seal

Viton/EPDM/Chemraz/Kalrez/Aflas, etc.

Speed

≤35m/s

Spring and Metal Part

Stainless Steel/Hast C


CF300Q-1.jpg
CF300Q-2.jpg



Product Specifications


D1 (mm)D2D3D5L1L2L3L5
2543.510412.519482562
2846.510412.519482562
3048.510412.519482567
3250.510412.519482567
3350.510412.519482567
3553.511012.519482570
3856.512514.719482575
4058.512514.719482575
4260.513314.719482580
4361.513314.719482580
4563.514014.719482582
4866.514014.719482582
5068.514014.719482587
5371.515017.519482592
5573.515017.519482592
6078.516017.5194825100
6583.516517.5194825105
7088.518017.5194825120
7510019017.520.551.530125
8010519017.520.551.530130
8511022021.520.551.530135
9011522021.520.551.530140
9512022021.520.551.530145
10012522021.520.551.530150


D1 (inch)D2D3D5L1L2L3L5
1.0001.7134.0940.4920.7481.8900.9842.441
1.1251.8314.0940.4920.7481.8900.9842.441
1.2501.9884.0940.4920.7481.8900.9842.638
1.3752.1074.3310.4920.7481.8900.9842.756
1.5002.2254.9210.5790.7481.8900.9842.953
1.6252.3825.2360.5790.7481.8900.9843.150
1.7502.5005.5120.5790.7481.8900.9843.228
1.8752.6185.5120.5790.7481.8900.9843.228
2.0002.6975.9060.5790.7481.8900.9843.425
2.1252.8156.1020.6890.7481.8900.9843.622
2.2503.0126.2990.6890.7481.8900.9843.937
2.3753.0916.4690.6890.7481.8900.9843.937
2.5003.2096.6930.6890.7481.8900.9844.055
2.6253.4067.0670.6890.7481.8900.9844.724
2.7503.4847.4800.6890.7481.8900.9844.724
2.8753.8587.4800.6890.8072.0271.1814.843
3.0003.9377.4800.6890.8072.0271.1814.921
3.1254.1348.6610.6890.8072.0271.1815.118
3.2504.2528.6610.8460.8072.0271.1815.236
3.3754.3318.6610.8460.8072.0271.1815.315
3.5004.5288.6610.8460.8072.0271.1815.512
3.6254.6068.6610.8460.8072.0271.1815.591
3.7504.7258.6610.8460.8072.0271.1815.709
3.8754.9218.6610.8460.8072.0271.1815.906
4.0004.9218.6610.8460.8072.0271.1815.906



Workshop


This workshop is equipped with professional processing equipment and integrated with standardized material warehousing management, enabling a one-stop production process from precision machining to finished product delivery. It ensures part machining accuracy and production efficiency, meeting various high-specification manufacturing requirements.


Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606



Product Research, Development and Testing


Our Product R&D and Testing focuses on optimizing seal performance through advanced simulation and material analysis. All seals undergo rigorous trials, including thermal cycling and pressure tests, to ensure durability, minimal leakage, and long service life in demanding industrial environments.


R&D and Design.jpg
microscope.jpg
Light band detection.jpg
pressure test.jpg



Industry Solutions


Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606




Case Study


HVAC Wholesaler Feedback: An HVAC wholesaler frequently received complaints about leaks in 22mm hot water circulation pumps due to installation errors. Cartridge design reduced their return rate by 85%.

Testimonials


These 20mm seals are a bestseller in our catalog. The carbon quality is consistent, and our contractor clients love that they just slide them on.

—Michael T., Pump Parts Distributor, UK



FAQs


Q: Why choose a cartridge design for such small shaft sizes?

A: Small pumps often have very limited workspace, making it difficult for technicians to precisely install component seals manually. Even a 1mm error in spring compression can cause leakage. Our cartridge design pre-assembles all parts, eliminating installation errors and significantly extending the service life of small utility pumps.

Q: Is this 20mm/22mm cartridge seal a direct replacement for my pump's original seal?

A: In the vast majority of cases, yes. Our 20mm mechanical seal and 22mm mechanical seal cartridges are designed to ANSI/ISO dimensional standards for direct interchangeability. Please provide your pump model or old seal part number for us to confirm 100% compatibility.

Q: What is the advantage of a carbon/graphite face over other materials in this mechanical seal?

A: The carbon mechanical seal or graphite mechanical seal face offers superior self-lubrication, which is critical in applications with poor lubricity (like water) or during dry start-up. It also has excellent thermal conductivity to dissipate heat from the seal face, reducing the risk of thermal cracking. It provides a reliable and cost-effective solution for many general industrial fluids.


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If you have any questions about our products and services, please feel free to contact us. Our team will get in touch with you within 24 hours!
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    Our company is specialized in the production of sealing materials, mechanical seals , cartridge seals.

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