01 Multi-Spring
02 Single-Spring
03 Welded Metal-bellows
04 PTFE Bellows
05 Agitator Seal
06 Support System
07 Coupling
08 Rubber-bellows
↓ Drag / Click to Switch

Multi-Spring

Mechanical Seal

Description & Design
Complies with DIN24960/GB6556, compact structure, and integral ring design, giving the seal good pressure and heat deformation resistance. It ensures minimal end-face deformation under high-pressure conditions and can also be made into a cartridge type.
Application & Media
Industries: Rotary shaft equipment, i.e., centrifugal pumps.
Dedicated media: Used to seal clean or medium/low-viscosity media containing certain solid particles, such as oil, hot/cold water, chemical raw materials, edible oils, beverages, etc.
Variants
With corrosion-resistant materials selected, it can be used in some strongly corrosive working conditions. Derived series: A8U, A8B, A8UV, A8BV, A8BKC, etc., for different requirements.
Multi-Spring
SEALING
Advanced
Sealing
Solutions
50K+
Annual production capacity
mechanical seals.
15 MPa
Max operating pressure
reliable performance.
25K
Max speed rpm
high-speed sealing.
SEALING
SOLUTIONS
MECHANICAL SEAL · API682 · MECHANICAL SEAL · API682
RELIABLE
High-Performance Sealing
Engineered for high-temperature, high-pressure, and high-speed pumps. Single, double, and tandem mechanical seals with API682 compliance.
— Temp: -60°C ~ +450°C — Pressure: 15 MPa
Proven & Dependable
Supplying leading refining enterprises. Non-contact liquid film seals, seal auxiliary systems, and couplings.
— API682 Standard — ISO 9000
Certification & Standards

Quality Assurance & Patent Certification

Three-system certification certificate Executive standards: ISO 9001:2015, etc. After-sales certification, green chain management system

Patent Certificate

Patent No. ZL202120291181.3

DANDONG SEAL
EST. 1997

Dandong Mechanical
Seal Institute

Integrating science, industry, and trade to provide dependable high-temperature, high-pressure mechanical seals globally.

ISO 9000 API682 STD SINOPEC VENDOR

50,000+Sets

Annual production capacity. Relentlessly serving the petroleum, chemical, electric power, and aerospace industries with high-quality and sufficient quantity spare parts.

VIEW MORE →
/ COMPANY PROFILE 01

Established in July 1997, Dandong Mechanical Seal Research Institute is a domestic professional manufacturer integrating science, industry, and trade. Located in the Dandong Industrial Park, we operate a 2,000 sqm factory with registered capital of 50 million yuan. Our core products include high-temperature, high-pressure, and high-speed mechanical seals for pumps, kettles, non-contact liquid film systems, and auxiliary couplings.

/ TECHNICAL EXCELLENCE 02
-60°C to +450°C TEMP RANGE
Up to 15 MPa MAX PRESSURE
25,000 RPM (100 m/s) MAX SPEED
API682 standard COMPLIANCE
/ INDUSTRY APPLICATION 03

Backed by a skilled technical team where senior personnel account for 32% of our workforce, we possess strong capabilities in localizing foreign seals and adapting to complex working conditions. As a first-level network supplier for Sinopec and CNPC, we strictly implement the ISO 9000 quality management system. We adhere to the motto: "Renewal as the foundation, sincerity and mutual success."

Dandong Seal

Technical Excellence &
Manufacturing Advantage

Equipped with state-of-the-art precision mechanical processing and rigorous implementation of the ISO 9000 quality management system, our institute delivers superior mechanical seals engineered for extreme environments. Serving premier refining and petrochemical enterprises under CNPC and Sinopec, our solutions achieve operating temperatures from -60°C to +450°C, maximum pressures up to 15 MPa, speeds up to 25,000 rpm, and linear speeds of 100 m/s strictly conforming to API682 standards.

High-Temp & Pressure Seals

Specialized seals for high-temperature, high-pressure, and high-speed pumps, kettles, and non-contact liquid film systems.

API682 Engineering Standards

ISO 9000 Quality Assurance

Precision Machining Lab
Precision Machining Lab
Testing & Quality Control
Testing & Quality Control

Mechanical Seal Solutions for Every Application

High-Temperature · High-Pressure · High-Speed | Customized to Your Conditions, Delivered Fast

Explore Our Seal Portfolio

Browse from a wide range of optimized seal types for your specific needs.

Quick Delivery Global Support Custom Designs
服务政策 · 全宽优化
// TRUST & EXCELLENCE

Comprehensive
Service Policy

Delivering uncompromised security, reliable global logistics, and protected transactions for a seamless partnership worldwide.

200+ Countries

Logistics Service

Secure, fast and on-time shipping with package location tracked online.

100% Secure

Buyer Protection

Comprehensive buyer protection and worry-free shopping experience throughout.

GlobalAuth

Certification

International authoritative certification and dual-guarantee of quality.

OneClick

Global Payment

Global currency processing, secure, fast, and remarkably easy checkout.

CHEMICAL
INDUSTRY
REFRIGERATION
SHIPBUILDING
AEROSPACE
DEEP PROCESSING
OF GRAIN
PAPER
INDUSTRY