Stainless Steel PTFE-PI Oil Seal for Heavy Machinery/Mechanical shaft seal/High Pressure Temperature Resistance

1. Product Advantages

• Excellent high and low temperature resistance, adapting to -200℃ ~ +300℃ (short-term up to 400℃), suitable for extreme temperature working conditions matching its application scenarios.

• Low friction coefficient (≈0.02), self-lubricating, low heat generation, and long service life (about 20 times that of ordinary rubber oil seals).

• High corrosion resistance, compatible with strong acids, alkalis, organic solvents, hot oil and other media, perfectly fitting harsh chemical environments in its application range.

• High-speed stability, with a maximum linear speed of 30 m/s and pressure resistance of ≤1 MPa, ensuring stable sealing without leakage in high-speed industrial equipment.

• Stainless steel skeleton ensures good rigidity and deformation resistance, not easy to damage during installation and use.

2. Working Principle

The 304/316 stainless steel skeleton provides rigid support to prevent the seal from deforming during operation. The filled modified PTFE sealing lip, with its low friction (≈0.02) and wear resistance, fits closely with the rotating shaft to form an effective sealing interface, preventing medium leakage. The PI reinforcement layer enhances the mechanical strength and high-temperature resistance of the sealing lip, further improving the seal’s service life (about 20 times that of ordinary rubber oil seals) and stability. When the shaft rotates, the sealing lip maintains close contact with the shaft surface through its own elasticity and medium pressure, ensuring reliable sealing performance in extreme working conditions.

3. Product Details

• Skeleton: 304/316 stainless steel, with strong corrosion resistance and rust resistance, ensuring long-term stable use in harsh environments.

• Sealing Lip: Filled modified PTFE, low friction, wear-resistant, self-lubricating, no need for additional lubrication in some working conditions.

• Reinforcement Layer: PI (Polyimide), which effectively improves the high-temperature resistance and mechanical strength of the seal.

• Color: Silver (skeleton) + Black/Brown (sealing lip), regular model, customizable according to customer needs.

• Hardness: 55~65 Shore D (sealing lip); ≥200 HB (stainless steel skeleton), ensuring structural stability and wear resistance.

4. Application Range

Widely used in extreme working conditions such as air compressors, vacuum pumps, chemical pumps, reactors, mixers, reducers, new energy motors, high-speed gearboxes, food and pharmaceutical equipment, and high-vacuum systems—all scenarios that require its high temperature resistance, corrosion resistance and high-speed stability.

5. FAQ

Q1: What is the maximum temperature this oil seal can withstand?

A1: The long-term working temperature is -200℃ ~ +300℃, and the short-term maximum temperature can reach 400℃.

Q2: Is the material of the skeleton customizable?

A2: The standard skeleton material is 304/316 stainless steel, and other corrosion-resistant stainless steel materials can be customized according to customer needs.

Q3: Does this oil seal require additional lubrication during use?

A3: The modified PTFE sealing lip has self-lubricating performance, so additional lubrication is not required in most working conditions; it can be used in oil-free or low-oil environments.

Q4: What is the service life of this oil seal?

A4: Its service life is about 20 times that of ordinary rubber oil seals, and it can be used stably for a long time in normal working conditions.

6. Company Selling Points (Forever Seals)

• Professional R&D team: We have a professional R&D team dedicated to the research and development of high-performance industrial seals, continuously optimizing product performance to meet the needs of extreme working conditions for this stainless steel PTFE-PI oil seal.

• High-quality raw materials: We adopt 304/316 stainless steel, modified PTFE and PI raw materials with reliable quality, ensuring the product’s stability, durability and excellent performance in various harsh environments.

• Customization service: We provide personalized customization services according to customer needs, including size, material, color and other aspects.

• Perfect after-sales service: We have a professional after-sales team to provide timely and effective after-sales support, solving customer use and installation problems.