If you work in manufacturing, you know the importance of quality mechanical seals. They join industrial machinery by containing pressure and eliminating the risks of leakages and contamination.
Mechanical seals are used in various industries, including automobiles, oil and gas production, pumps and compressor OEMs, quarrying and coal mining, residential devices, and more. While these seals are useful, their efficacy depends on their quality.
If you are looking for the best mechanical seal manufacturers and suppliers, you are at the right place. Here is a review of the top 10 options in China with a detailed overview of their pros and cons.
An Overview of the Mechanical Seal Industry
The manufacturing seals market is anticipated to reach a value of $5.0 billion by 2033. This shows the growing demand for mechanical seals. But what is a mechanical seal, and why is it important in industries?
A mechanical seal is a major component of rotating equipment, typically used to prevent the leakage of high-pressure fluids from systems.
While its design and configuration may vary, a basic mechanical seal comes with a pair of seal faces and is made to work even in harsh environments. One is connected to the rotating shaft, and the other is linked to the machine’s stationary casing.
During operations, a very thin film of fluid is present between the faces to lubricate and prevent excessive wear. These seals are made of different materials, depending on the required fluid resistance and the overall operating system.
The face of mechanical seals is usually made of carbon graphite, while the hardware, springs, and drive mechanisms are crafted from metals. Moreover, the secondary seals are made of polymeric or elastomeric materials.
Factors to Consider When Choosing a Mechanical Seal Manufacturer
Whether you run a food processing business or a paper formation venture, you may need a mechanical seal to run your operations smoothly. For that, you must find the best manufacturers and suppliers in China.
Never seal the deal with anyone that you may think is good. Consider the following things before choosing a supplier:
1. Industry-specific Expertise and Reputation
When shortlisting a manufacturer for your mechanical seal, ensure that you find companies with a solid reputation in the industry. Also, consider their experience in manufacturing seals, including the years they have worked for a reputable client base.
It is better to pick a supplier who has been in the business for a while as they are in a better position to understand market demands and needs.
2. Product Range
The right supplier of your mechanical seal can preferably be the one with a wide range of this product available for sale in different sizes. This way, they can be a good option to meet your specific requirements.
It is a major plus if a manufacturer provides custom sealing solutions at a great price.
3. Quality Assurance
Don’t compromise on this. You don’t want your mechanical seal to break in the middle of a process, resulting in high maintenance costs. Make sure that your desired seals are made of high-quality carbon graphite.
You can check if the manufacturer meets all the important international quality standards. Some of the common ones are ISO/TS 16949 and ISO 9001. Make sure you also go through other industry-specific certifications that may be relevant to manufacturing seals.
4. Support
You may be running an experienced business for years. However, technical support regarding your mechanical seal may be required at any point.
Therefore, to avoid any hindrances, look for a seal supplier that offers timely support regarding seal design, troubleshooting, or additional guidance during product selection.
5. Capacity
Delays in the supply of your pack of mechanical seals may disrupt your processes and production. To avoid that, ensure that your chosen manufacturer’s capacity perfectly meets your demand for seals.
A manufacturer with a large capacity of mechanical seals and a few major customers is a plus. This way, they can ensure everyone’s demands are met on time.
6. Supply Chain Management
Only a professional supplier with smooth logistics can meet your demand. To avoid mishaps, you should pick one with efficient supply chain management.
To check this factor, you can contact the clients of your preferred manufacturer for a review. You can ask them about the supplier’s lead times and ways to handle logistic challenges.
7. Cost
You may wish to find manufacturers that offer mechanical seals at an affordable price. However, while they may help you reduce expenses, their products might not offer the desired quality.
Most top manufacturers offer competitive prices for their seals. So, instead of worrying about the cost, consider the seals that provide excellent quality. Even if they are pricey, their making will support your use for a long time.
Avoid low-cost suppliers who may give you poor-quality seals that won’t last long.
Top 10 Mechanical Seal Manufacturers in China
| Position | Brand Name | Year Founded | Location | Employ Size |
|---|---|---|---|---|
| 1 | Hongju Silicon Co. Ltd | 1999 | Guangdong | 100-500 |
| 2 | Cowseal Co Ltd. | 2000 | Ningbo | 11-50 |
| 3 | Shanghai Pacific Pump Manufacture (Group) Co., Ltd. | 1988 | Shanghai | 1000+ |
| 4 | Sealcon | 2011 | Fuyang, Hangzhou | 100+ |
| 5 | Zhejiang JK Technology Co.Ltd | 1999 | Jiashan, Zhejiang Province | 100+ |
| 6 | YALAN Seals | 2001 | Chuzhou | 70 |
| 7 | Eagle Burgmann Seals Ltd (Wuhan) | 1970 | Wuhan | - |
| 8 | Zigong Wenxin Machinery Manufacturing Co., Ltd. | 2012 | Zigong City, Sichuan Province | - |
| 9 | Zigong Nest Seals Co., Ltd. | 2000 | Zigong, Sichuan | 100+ |
| 10 | SinoSeal | 1978 | Chengdu City, Sichuan | 1000-5000 |
The companies mentioned in the table have been rated according to the quality and quantity of mechanical seals they offer. We have also positioned them based on their product range, including pump seals, rotary seals, framework oil seals, and dry gas seals.
Moreover, we have also evaluated their customer support, reputation, and overall satisfied client base to help you make the best choice.
1. Hongju Silicone Co, Ltd.
Our top pick is undoubtedly Hongju Silicone Co, Ltd. This leading wholesaler and manufacturer in China provides high-quality mechanical seals to various industries, including food, electrical, mining, engineering, and automotive.
With more than 20 years of experience in production and design, Hongju Silicone Co. Ltd takes pride in using harmless and environmentally friendly materials for its seals, bearing isolators, and other rubber items. You can also get custom seals made and evaluate a sample for free before giving the company the go-ahead.
Hongju Silicone excels at offering custom-engineered solutions for other machinery matters following international standards.
Pros
- Environmentally Friendly Resources: The seals manufactured or sold at Hongju Silicone Co Ltd are made of environmentally friendly materials and methods.
- Custom Solutions: You can get your custom-made manufacturing seals at Hongju Silicone Co Ltd at a competitive rate.
- Timely Delivery: Hongju excels at efficient supply chain and timely deliveries.
Cons
- Limited Distribution: The company’s products are currently exported only to Japan, North America, Korea, and a few parts of Europe.
- Only Silicone Rubber Products: Hongju currently deals with silicone rubber seals and products. The product range needs an extension to cover other materials.
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2. Cowseal Co Ltd
If you are specifically looking for mechanical seals for centrifugal or water pumps, Cowseal Co Ltd in China may be a good high-tech enterprise option. The company offers mechanical seal repair, replacement, and customization of machined seals.
At Cowseal, you can find four types of seals for your pumps: Type 1, Type 21, Grundfos Mechanical Seal, and Burgmann MG1 MG12 MG13 MGS20.
Despite being a relatively new company, Cowseal excels at customer support and offers a wide range of customized solutions to every client.
Pros
- Excels at Pump Seals: Cowseal caters to a niche line of products, so it offers high-quality seals to every customer.
- Custom Seal Solution: The company customizes mechanical seals as per your needs.
- Free Testing: Cowseal offers samples for you to test, approve, and then pay for the seals.
Cons
- Limited Product Range: The company sells only seals. For other products, you will have to look for different sources.
- High Pricing: Cowseal offers high quality but also charges a comparatively higher rate per seal.
3. Shanghai Pacific Pump Manufacture (Group) Co, Ltd.
With headquarters in China, Shanghai Pacific Pump Manufacture Co., Ltd produces mechanical seals and pumps for various industries, including chemical processing, oil and gas, and water treatment. The company is known for its exceptional customer support in China and worldwide.
Pros
- Large Market: Shanghai Pacific Pump Manufacture has been in the industry since 1988, which is why it has grown to have a large market and satisfied client base.
- High-Quality Seals: The company excels at the quality of its products for your electronic equipment at affordable prices.
- Extensive Support: It provides great technical and customer support worldwide.
Cons
- Limited Customization: The company doesn’t offer many customization solutions for seals required in different industries.
- Long Lead Times: A few clients have complained about long lead times.
4. Sealcon
China Sealcon provides a wide range of custom-designed and standard sealing products, including many seals such as O.E. M, O-rings, and double cartridge mechanical seals. The company uses the latest technologies and a wide selection of materials such as stainless steel, rubber, and TC to meet every customer’s requirements.
Pros
- Seals for Pumps and Agitators: You can find mechanical seals for pumps and agitators, such as a cartridge mechanical seal, seal kits, and o-rings.
- Vast Variety of Seal Materials: Sealcon uses many materials for mechanical seal customization.
- Mechanical Seals Replacement: As part of its services, Sealcon also offers quick seal replacement.
Cons
- Poor Technical Support: Sealcon’s support isn’t as good as that of other companies on the list.
- Slow Delivery: The company takes 20 or more days to deliver customized products.
5. Zhejiang JK Technology Co. Ltd
Next, we have Zhejiang JK Technology, a professional manufacturer of top-class mechanical seals and seal support systems since 1999. The company produces products according to JB/T 4127.1., DIN24960, API682, and other acceptable standards.
Pros
- Variety of Seals Available: The company manufactures pushers, cartridge seals, agitators, welded metal bellow seals, and others.
- Extensive Industry Experience: They cater to various markets, from chemical processing to the water industry.
- Good Support: You can get quick after and pre-sale support from the team.
Cons
- Limited Customization: Customized service on mechanical seals is limited.
- High Pricing: The company charges more for its seals than other competitors.
6. YALAN Seals
YALAN Seals is a popular name in China and is known for its 3,600 types of designed and manufactured mechanical seals. The company offers a range of products, such as agitator seals, pump seals, mechanical seals, and rubber bellow seals.
Moreover, YALAN Seals is ISO9001:2015, ISO14001, and OHSAS18001 certified.
Pros
- Certified Manufacturer: YALAN has many certifications for its product quality.
- Large Client Base: The company has a large international client base, confirming its popularity.
- Strong Customer Service: YALAN’s technical and customer support are unmatched.
Cons
- Expensive Seals: YALAN charges high for customized seals.
- Limited Customization: You may find limited customization options with the seals.
7. EagleBurgmann Seals Ltd
Wuhan Burgmann Seals, from the Eagle Burgmann Group, has its headquarters in Wuhan and is a highly reputed mechanical seal manufacturer in China. The company’s extensive portfolio features pump seals, seal supply systems, carbon floating ring seals, and similar offerings.
Pros
- German Standard Performance: All seals are produced following strict German standards.
- Reputable Company: Burgmann Seals has excellent customer reviews and reputation.
- Cater to Many Industries: This manufacturer also provides some great products for power generation equipment catered to automotive, shipbuilding, food, textile, and other industries.
Cons
- Slow Customer Support: This is a huge problem when dealing with big manufacturers.
- Slow Delivery: Most deliveries are slow, according to a few customers.
8. Ziongong Wexin Machinery Manufacturing Co. Ltd
Ziongong Wexin Machinery Manufacturing excels at producing high-quality hydraulic and mechanical seals in China. It was formed in 2012 and has developed a wide range of products for its customers since then.
It is a professional seal manufacturer that integrates R&D, sales, and other relevant services successfully.
Pros
- Wide Variety Available: They offer a wide variety of seals that meet maximum operating conditions.
- Affordable Rates: The prices are affordable and competitive.
- Great Delivery: The company doesn’t delay deliveries.
Cons
- Outdated Website: You may find the website outdated and difficult to navigate properly.
- Lacks Efficient Support: The company doesn’t offer strong technical support.
9. Zigong Nest Seals Co. Ltd
Zigong Nest Seals is a high-tech manufacturer of mechanical seals. The company has acquired the ISO9001-2000 quality management system certification and has passed the “Mechanical Seal” inspection from the General Administration of Quality Supervision, Quarantine, and Inspection.
Pros
- Wide Range of Seals Available: The manufacturer offers an attractive range of seals, including mechanical and piston seals for various applications.
- Various Application Areas: These seals can be used in food processing, mining, and petrochemical industries.
- Accessible Support: The technical support at Zigong Nest Seals is readily accessible.
Cons
- Poor Website Interface: The website is non-friendly and outdated.
- Limited Customization: Limited customization services are available for seals.
10. SinoSeal
SinoSeal Holding Co. Ltd is one of the leading manufacturers of mechanical seals, hydraulic seals, and silicone gaskets in China. The company offers products for the petrochemical, electric power, and gas chemical industries.
Pros
- More than 30 Years of Experience: The company’s vast experience makes it a great manufacturer of high-quality products.
- Vast Certifications: SinoSeal is a highly certified company that follows high manufacturing standards.
- Great Customer Support: The company provides excellent pre and post-sale customer support.
Cons
- Expensive Products: You may find some seals pricier than competitors.
- Quality Issues: Certain products have quality issues as SinoSeal fails to maintain its quality.
Final Thoughts
Have you picked your favorite mechanical seal manufacturer and supplier from the list above? Before you order your seals, evaluate the quality of the products, support, reputation, and prices the company offers.
For us, Hongju Silicone takes the top spot for its amazing range of products and timely deliveries. Therefore, we recommend you try them first.
Why Choose Hongju Silicone for Your Projects?
Hongju Silicone has been in this industry for quite some time and has all the experience any company aims to achieve in manufacturing high-quality mechanical seals. Hongju offers great value, courtesy of its high-standard manufacturing methods and environmentally friendly products that generate incredible sealing performance.
Other than mechanical seals, Hingju Silicone excels at a vast rubber parts product range, including rubber feet, gasket seals, and silicone swim caps that outperform even in extreme environments.
Hongju Silicone undoubtedly stands tall among its competitors. They are a one-stop solution for your mechanical seal needs. Contact us today to get a quote now!
