This page is not the official website. Generated by AI, does not constitute any advice. If needed, please click here to visit the corresponding official website.

Precision Piston Rings for Demanding Applications

Trusted by OEMs worldwide — 30+ years of engineering excellence in piston rings, piston kits, and sealing components for motorcycles, automobiles, compressors, and industrial engines.

Explore Products Visit Official Website

About Dongya

Fujian Dongya Machinery Co., Ltd. is a leading manufacturer of piston rings and sealing components with over 30 years of experience in the industry. We are committed to innovation, quality, and sustainability.

First Chinese piston ring manufacturer to pass ISO/TS16949 (2002)
Certified under IATF16949, ISO14001, and ISO45001
Participated in 80% of new product development for major OEMs
Over 50 patents and contributions to national technical standards
Factory Overview
30+
Years of Excellence

Our Product Range

High-performance piston rings engineered for durability, efficiency, and precision across diverse engine types and industrial applications.

Motorcycle Piston Ring

Motorcycle Piston Ring

High-strength rings for 2-stroke and 4-stroke motorcycle engines. Optimized for performance and longevity.

  • Material: Cast iron & steel
  • Coatings: Nitriding, PVD
  • Diameter: 35–100mm
Automobile Piston Ring

Automobile Piston Ring

Precision-engineered for gasoline and diesel engines. Designed for low friction and high thermal stability.

  • Material: Alloy steel, nodular cast iron
  • Coatings: DLC, DTC, PCR
  • Diameter: 60–150mm
Air Compressor Piston Ring

Air Compressor Piston Ring

Robust sealing rings for industrial compressors. Resistant to high pressure and continuous operation.

  • Material: PTFE, Cast iron
  • Coatings: PVD, Nitriding
  • Diameter: 25–120mm
2-Stroke Piston Ring

2-Stroke Piston Ring

Specialized rings for 2-stroke engines with enhanced oil control and reduced blow-by.

  • Material: Steel, Cast iron
  • Coatings: Chrome, Nitriding
  • Diameter: 16.5–80mm

Gasoline Engine Piston Ring

High-efficiency rings for modern gasoline engines. Designed for low emissions and fuel economy.

  • Material: Nodular cast iron
  • Coatings: PVD, PCR
  • Diameter: 50–140mm

Diesel Engine Piston Ring

Heavy-duty rings for diesel engines. High resistance to thermal stress and wear.

  • Material: Alloy steel, Compacted graphite iron
  • Coatings: DLC, DTC
  • Diameter: 80–150mm

General Purpose Engine Ring

Versatile rings for small engines, generators, and agricultural machinery.

  • Material: Cast iron
  • Coatings: Chrome, Nitriding
  • Diameter: 20–100mm

Piston Kit (Complete Set)

Complete piston ring kits with top, second, and oil control rings. Pre-matched for optimal performance.

  • Compatibility: OEM-specific
  • Applications: Motorcycle, Auto, Industrial
  • Customizable: Yes
View All Products

Customization and Process

From concept to mass production — we support full OEM/ODM development with advanced engineering and rapid prototyping.

Customization Capabilities

  • Cylinder Diameter: 16.5mm – 150mm
  • Coatings: DLC, DTC, PVD, PCR, Nitriding
  • Materials: Steel, Cast Iron, Special Alloys
  • OEM/ODM Support: Full design, testing, and production
Production Line Quality Control R&D Lab Engine Testing

Our Development Process

01

Engine Parameters

Determination and design

02

Scheme Design

Conceptual engineering

03

Delivery Plan

Timeline & logistics

04

Drawing Design

CAD & simulation

05

Prototype & Testing

Bench and field tests

06

Mass Production

Delivery & support

R&D Capabilities

Backed by advanced laboratories and simulation tools, our R&D team drives innovation in materials, coatings, and tribology.

Materials Research

Development of specialized alloys and composite materials for enhanced durability and performance.

Surface Treatment

Advanced coatings: DLC, PVD, DTC, PCR, Nitriding for wear and corrosion resistance.

Tribological Research

Friction, wear, and lubrication optimization using AVL-Excite PR and CAE simulations.

Testing & Validation

Comprehensive bench and engine testing under real-world conditions.

Automation Research

Smart manufacturing and process automation for consistent quality and efficiency.

System Integration

Research on piston ring components and their interaction within engine systems.

80%
Participation in new product development for mainstream OEMs

Latest News

Stay updated with industry trends and company developments.

Nov. 24, 2025

Global Automotive Market Sees Strong Demand for High-Precision Automobile Piston Rings

As engines evolve toward higher efficiency and lower emissions, demand for precision piston rings continues to rise.

Nov. 24, 2025

Air Compressor Piston Ring – High-Performance Replacement Rings

Our latest compressor rings offer extended service life and reduced downtime in industrial applications.

Oct. 23, 2025

138th Canton Fair & DY Piston Ring Participation 2025

Dongya showcased advanced technologies in Guangzhou, strengthening global partnerships and market presence.

View All News and Updates

Get in Touch

Interested in our products or custom solutions? Visit our official website to learn more and get a quote.

Visit Official Website
China Quality Suppliers fobcompany.info

Notice for Buyers: If you are a buyer, the above information is generated by AI collection and does not constitute any advice. If necessary, please visit the corresponding official website.

For Domain Owners: If you are the domain owner and do not want to be included by fobcompany.info, please contact [email protected] via your corporate email to cancel. We will cancel your inclusion within 3 business days.

如果您是域名所有者 不想被fobcompany.info收录 请用企业邮箱联系[email protected] 取消收录 我们将在3个工作日取消您的收录

Service Request: If you are other domain and want to be included, please contact [email protected]

如果您是其他域名合作 也请联系[email protected]