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Help CenterShanghai Liancheng Pump Mechanical Seal 304 Stainless Steel 50mm Shaft Oil & Gas Service
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As a professional manufacturer based in Suzhou, Jiangsu, China, Jiangsu Manqi Machinery Co., Ltd. proudly presents the Shanghai Liancheng Pump Mechanical Seal 304 Stainless Steel 50mm Shaft – a reliable sealing solution engineered specifically for oil and gas service applications. With over 7 years of manufacturing experience and a modern factory spanning 10,000-30,000 square meters, we deliver precision-crafted mechanical seals that meet the rigorous demands of the energy industry. This seal combines durable 304 stainless steel construction with a 50mm shaft size, ensuring compatibility with a wide range of pumps used in upstream, midstream, and downstream operations. Backed by a skilled team of 11-50 employees and serving markets across Eastern Europe, Southeast Asia, Africa, and South Asia, we are committed to providing cost-effective, high-performance sealing solutions without compromising quality.
Product Overview
The Liancheng mechanical seal is a critical component for preventing fluid leakage in rotating equipment. Designed for oil and gas environments where reliability is paramount, this seal offers robust performance under high pressure and temperature conditions. The 304 stainless steel construction provides excellent corrosion resistance against hydrocarbons, sour gases, and chemical additives commonly encountered in wellhead, pipeline, and refinery applications. With a standard shaft diameter of 50mm, it fits many centrifugal pumps, compressors, and mixers used in the industry.
Key Features & Benefits
- Durable 304 Stainless Steel: Resists rust, pitting, and chemical attack, extending service life in harsh oilfield fluids.
- Precision 50mm Shaft Fit: Ensures leak-free operation with minimal wear on both seal and shaft.
- Customizable Seal Face Materials: Options include silicon carbide, tungsten carbide, and carbon graphite to match specific fluid and temperature requirements.
- Balanced Design: Reduces heat generation and face deformation, improving performance at higher pressures.
- Easy Installation: Compact unitized construction simplifies replacement and reduces downtime.
- Versatile Applications: Suitable for light to medium crude oil, natural gas liquids, refined products, and water injection services.
Technical Specifications
| Parameter | Value |
| Shaft Diameter | 50 mm |
| Metal Material | 304 Stainless Steel |
| Working Pressure | Up to 25 bar (optional) |
| Temperature Range | -20°C to +200°C (optional) |
| Seal Face Options | SiC, TC, Carbon (customizable) |
| Applications | Oil & Gas, Water Injection, Refining |
Why Choose Jiangsu Manqi Machinery?
Our factory in Suzhou operates with strict quality control procedures, ensuring each mechanical seal meets precise dimensional and material standards. With an annual export value under US$1 million, we focus on niche markets, offering personalized service and flexible order quantities. We have successfully supplied seals to customers in Eastern Europe, Southeast Asia, Africa, and South Asia for oilfield booster pumps, transfer pumps, and LACT units. Our experienced team of 11-50 professionals provides technical support, from selection guidance to troubleshooting. We ship from the Port of Shanghai, ensuring fast and reliable logistics to global destinations.
Frequently Asked Questions
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Q: Is this mechanical seal suitable for sour gas service (H2S)?
A: The 304 stainless steel offers good general corrosion resistance, but for severe H2S environments, we recommend upgrading to 316L or duplex stainless steel, which can be customized upon request. -
Q: What is the typical lead time for this seal?
A: Standard 50mm seals are usually in stock and can be shipped within 7-10 days after order confirmation. Customized versions may take 15-25 days depending on material availability. -
Q: Can I use this seal for hot water or steam services?
A: The standard seal is designed for oil and gas fluids. For hot water or steam above 100°C, please consult our engineers for appropriate face material and cooling system recommendations. -
Q: Do you provide installation instructions or technical drawings?
A: Yes, we supply a detailed product manual and dimensional drawings with each order. Installation videos are also available upon request. -
Q: What is the maximum rotational speed this seal can handle?
A: For a 50mm shaft, the seal can operate safely up to 3600 RPM. Higher speeds require dynamic balancing and can be discussed with our team. -
Q: How do I ensure the correct seal face pairing for my fluid?
A: We offer a selection guide based on fluid type, temperature, and pressure. Please share your operating conditions, and our technical support will recommend the best face combination. -
Q: What is the warranty period?
A: We offer a 12-month warranty against manufacturing defects from the date of shipment. This does not cover damage caused by improper installation or abnormal operating conditions. -
Q: Can I order a sample for testing before bulk purchase?
A: Absolutely. Sample orders are welcome. We can provide a single unit at cost price. After successful testing, we offer competitive pricing for volume orders.
Trust & Reliability Behind Every Seal
Since 2017, Jiangsu Manqi Machinery Co., Ltd. has specialized in manufacturing mechanical seals for rotating equipment. Our 10,000-30,000 sqm factory is equipped with CNC lathes, grinding machines, and dynamic test benches to ensure consistent quality. We have shipped products to over 10 countries, building long-term partnerships with pump distributors and oilfield service companies. Without relying on external certifications, we adhere to internal quality standards that meet or exceed API 682 requirements. Each seal undergoes a hydrostatic pressure test and dimensional inspection before packing. When you choose our Liancheng mechanical seal, you receive a product that balances performance, durability, and value – backed by a responsive team ready to support your operations. Contact us today to discuss your specific oil and gas sealing needs – we are here to help you optimize pump reliability and reduce maintenance costs.
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