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Precision Sealing Solutions for Industrial Excellence

Manufacturer of high-performance mechanical face seals, oil seals, O-rings, piston & rod seals, wipers, guide rings, and custom sealing kits. Trusted by global industries since 2010.

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13+ Years

Industry Experience

ISO 3320

Quality Standards

Custom Kits

Any Design, Any Material

About Yimai Sealing

Welcome to Shaanxi Yimai Trading Co., Ltd., a leading technology company specializing in sealing products. Our predecessor, Shaanxi Baorun Electromechanical Technology Company, was founded in 2010, giving us over 13 years of experience in the sealing industry.

We began with simple O-ring production and have evolved into a full-service provider capable of manufacturing or customizing all types of sealing solutions — from mechanical face seals and skeleton oil seals to hydraulic, pneumatic, and static seals.

With a spirit of innovation and continuous improvement, we maintain product stability and reliability across diverse industrial applications worldwide.

Factory or Product Image

Our Core Advantages

Why customers trust Yimai Sealing for their critical sealing needs

Custom Products

We design and process sealing parts according to customer drawings. With over a decade of experience, we deliver non-standard, custom-sized, and material-specific sealing solutions.

High Quality

Strict quality control systems and professional testing procedures ensure compliance with international standards such as ISO 3320 and other national requirements.

Customer Service

"Customer first" is our service tenet. We help you find the best sealing solution for every application and concern, ensuring fast response and reliable support.

Our Product Range

Engineered for performance, durability, and precision across industries

Mechanical Face Seals

Mechanical Face Seals

Designed for extremely harsh environments. Includes DO and DF (Biconical) types for reliable performance under high pressure and temperature.

  • • Alloy steel rings with rubber support
  • • Floating seal design
  • • Ideal for heavy-duty applications
Oil Seals

Oil Seals (Radial)

Includes TC, TCV, TA, TB, SB, SA, and SC types. Made from rubber, metal frame, and spring for tight sealing.

  • • High-pressure resistance (TCV)
  • • Self-tightening spring
  • • Long service life
O-Ring Seals

O-Ring Seals

High-quality O-rings used as sealing or energizing elements in hydraulic systems and slipper seals.

  • • Available in NBR, FPM, and other materials
  • • Quad-lobe X-ring option
  • • Custom sizes and forms
Piston Seals

Piston Seals

Includes B7, CST, DAS (double-acting), EK, M2 (reciprocating), and OE types for hydraulic cylinders.

  • • Double-acting DAS seals
  • • Resistant to mineral oils and fire-resistant fluids
  • • Easy installation, no distortion
Rod Seals

Rod Seals

Axial preload (ES), single-acting (M1), U-ring (B3, BA), and servo system (OD) types.

  • • High wear resistance
  • • Suitable for control cylinders
  • • Low friction, long life
Wipers & Dust Seals

Wipers & Dust Seals

A1, AD, AS (standard dust seal), AY (double lip), and A5 (axial) types.

  • • Prevents contamination
  • • Double-lip design for enhanced protection
  • • Durable rubber construction
Guide Rings

Guide Rings

Piston (KB, KF) and rod (SB, SF) guide rings for alignment and wear protection.

  • • High bearing capacity
  • • Reduces vibration
  • • Dustproof and low maintenance
Rotary Seals

Rotary Seals

HXW (piston), HXN (rod), V-ring VA/VS (V-shaped) for rotating shafts.

  • • All-rubber V-ring design
  • • Waterproof and dustproof
  • • Retains grease effectively
Pneumatic Seals

Pneumatic Seals

EL, EM, DP (double U-shaped), and Z8 (lip seals) for pneumatic systems.

  • • Low friction
  • • High cycle life
  • • Compatible with air and inert gases
Static Seals

Static Seals

Back-up rings, X-rings, and radial static seals for non-moving joints.

  • • Prevents extrusion under pressure
  • • Quad-lobe design for better sealing
  • • Used in flanges and housings
Custom Seal Kits

Custom Seal Kits

Full customization: any size, form, quantity, and material — including polyurethane, rubber, nylon, POM, PTFE.

  • • Based on customer drawings
  • • Fast turnaround
  • • High-quality materials
Fluorine Rubber Seals

Fluorine Rubber (FPM) Seals

High heat resistance: long-term use at 200–250°C, short-term up to 300°C.

  • • Ideal for high-temp environments
  • • Resists oils and chemicals
  • • Maintains strength at elevated temps
13+
Years in Industry
100+
Custom Projects
ISO 3320
Quality Certified
Global
Distribution

Frequently Asked Questions

Get answers to common inquiries about our sealing products

What materials do you use for custom seals?

We use high-quality materials including NBR, FPM (fluorine rubber), polyurethane, rubber, nylon, polyformaldehyde (POM), and tetrafluoroethylene (PTFE), depending on application requirements.

Can you manufacture seals based on our drawings?

Yes, we specialize in custom sealing solutions. Send us your drawings or specifications, and we’ll produce seals to your exact requirements.

What industries do you serve?

Our seals are used in hydraulic systems, pneumatic equipment, machine tools, automotive, aerospace, oil & gas, and industrial machinery.

Do you offer samples?

Yes, we can provide samples for evaluation upon request. Contact us for details.

What quality standards do you follow?

We adhere to ISO 3320 and other national quality standards, with strict in-house testing and quality control procedures.

Get in Touch

Have questions or need a quote? Reach out to our team for expert sealing solutions.

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