High Temperature and High Pressure Resistant O-Ring Seal Gasket Round Flat PTFE Gasket Eptfe Seal Gasket

• Customization: Available
• Material: PTFE
• Application: Valve
• Model NO.: SX-00638
• Type: Stationary Seal
• Performance: Corrosion
• Shape: O-Ring
• Standard: Standard, Nonstandard
• Gasket Thickness: 1mm to 100mm
• Manufacturing Standards: ASME, BS, JIS and En(DIN) Standards and Others
• Supplier: 30 Year
• OEM or ODM: Yes
• Certificate: ISO SGS TUV
• Gasket Color: White
• Temperature: -180 to 260
• Size: Customer Needs
• Transport Package: Wooden Box Packaging
• Specification: Diameter 5mm to Diameter 3000mm
• Trademark: ShengXin
• Origin: China
• HS Code: 3926901000
• Production Capacity: 8000000 Piece/Year
• Package Size: 10.00cm * 10.00cm * 10.00cm
• Package Gross Weight: 0.500kg

Product Description

PTFE gaskets
 

PTFE gaskets, are made of polytetrafluoroethylene (PTFE). With its unique chemical and physical properties, they are widely used in many fields. The following is a detailed analysis of its uses and performance:

Main Applications

1. Chemical Industry
* Sealing and Anti-corrosion: Used for sealing of pipelines, valves, and reactors, resistant to strong acids, strong alkalis, and organic solvents 
* High Temperature Environment: Maintains performance at extreme temperatures of -200°C to +260°C, suitable for heat exchangers and high-temperature reaction equipment.
2. Food and Medicine Hygiene and Safety: Meets FDA standards, used for sealing of food processing equipment and pharmaceutical machinery to avoid contamination.
3. Electronic and Electrical High-Frequency Insulation: Used as sealing gaskets for cable insulation layers and high-frequency electronic components, with stable dielectric constants and reduced signal loss.
4. Mechanical Industry Low-Friction Seals: Used for dynamic sealing of hydraulic systems, compressors, etc. to reduce wear; Provides airtightness protection in vacuum equipment.

Core performance

1. Chemical corrosion resistance: Almost insoluble in all solvents (except molten alkali metals and high-temperature fluorine gas), resistant to aqua regia corrosion.
2. Wide temperature range adaptability Working temperature range: -200ºC to +260ºC, no brittleness at low temperature, no decomposition at high temperature.
3. Self-lubrication and non-stickiness: The friction coefficient is as low as 0.05-0.10, the surface is anti-sticky, easy to clean, and suitable for viscous medium sealing.
4. Excellent electrical insulation: The dielectric strength is as high as 20kV/mm, the dielectric loss is small, and it is suitable for high-frequency and high-voltage environments.
5. Flexibility and plasticity: It can be processed into special-shaped gaskets through molding, turning and other processes to adapt to complex sealing surfaces.

Limitations and precautions

1. Poor creep resistance: It is easy to deform under long-term high pressure, and needs to be checked regularly or used in combination with reinforcing materials (such as graphite and glass fiber).
2. Low mechanical strength: The tensile strength is about 20-35MPa, and it is not suitable to be used alone in high-pressure impact scenarios.
3. Poor thermal conductivity: The thermal conductivity coefficient is 0.25 W/(m·K), and it should be avoided in key heat dissipation parts.
4. Insufficient wear resistance: It may wear during high-load dynamic sealing, and fillers (such as carbon fiber) can be added to improve wear resistance.

PTFE gaskets are ideal sealing materials for chemical, food, electronics and other fields, especially in corrosion, high temperature and insulation scenarios. However, their mechanical performance limitations require users to select reinforced PTFE or composite gaskets according to specific working conditions (such as pressure, dynamic load) to ensure long-term reliability.

Real product display
 

01 Exhibition 

High and low temperature resistance

It has good mechanical toughness, working temperature range: -200ºC to +260ºC, does not become brittle at low temperature, does not decompose at high temperature. It can maintain 5% elongation.

 

02 Exhibition 

Corrosion resistance

It is insoluble in most chemicals and solvents (except molten alkali metals and high-temperature fluorine gas), exhibits inertness, and is resistant to strong acids and alkalis, water, and various organic solvents.

 

03 Exhibition 

High lubricity

The friction coefficient is as low as 0.05-0.10, the surface is anti-sticky and easy to clean, suitable for sealing viscous media. As a solid material, it has the characteristics of self-lubrication.

 

04 Exhibition 

Good flexibility

It has small surface tension, high stability, is not easy to deform or bend, has good extensibility and high hardness.

 

Mechanical properties
 

Properties		unit		Rseult
Apparent density		g/cm^3		2.30-2.50
Tensile strength(min)		MPA		15
Ultimate elongation(min)		%		150
Working Temp		ºC		-180~260
Melting point		ºC		327
Produce Max Temp		ºC		385

Compressive strength	Pa	(1834~2030)x10^4
hardness HB		0.13~0.16
Friction coefficient		14.5

Dielectric properties

Properties	unit	Rseult
Dielectric constant 50HZ		2.1 2.1
Dielectric loss tangent 50HZ		0.5x10^-4
Withstand voltage	KV/mm	60
Volume specific resistance	Ω.cm	10^14
Surface specific resistance	Ω	10^14

 

Thermal properties
 

Propertiesu	unit	Rseult
Thermal expansion coefficient 20~60ºC 20~100ºC 20~150ºC	10^-5X1/ºC10.3	10.5 11.4 12.8
Specific melting point ºC  50º	CJ/kg.K	0.96x10^3 1.05x10^3
Thermal conductivity	W/m.k	0.24

Cangzhou Shengxin Sealing Materials Co., Ltd. is located in Cangzhou City, Hebei Province, China, the world-famous "hometown of martial arts" and "capital of flange elbows". The company was established in 1985 and was formerly known as Cangxian Litong Sealing Products Factory. It has a history of more than 30 years of producing rubber products. After years of careful cultivation, the factory expanded its business scope in 1997 and added chemical sealing products such as metal spiral wound gaskets, asbestos gaskets, PTFE gaskets, graphite coated gaskets, toothed gaskets, heat exchanger gaskets, stainless steel ring gaskets, and packings. The company always adheres to the corporate spirit of "unity, endeavor, integrity, and innovation". With first-class product quality, good corporate reputation, and thoughtful and enthusiastic service, we welcome new and old customers at home and abroad to visit and negotiate business.

FAQ:
1. Are you a trading company or manufacturer?
A: We are a manufacturer with more than 30 years of production experience and have our own factory in Hebei.
2. Can you provide OEM or ODM service?
A: Yes, welcome.
3. Can you send me a sample? For free?
A: Yes, the sample is free, but the express fee should be on your side.
4. Is there any discount on the price you offer me?
A: The discounted price depends on the order quantity.
5. What are your payment terms?
A: 30% as deposit, 70% before delivery. Before you pay the balance,
We will show you the photos of the products and packages.
6. How about the delivery time?
A: Usually 15-30 days after receiving the 30% deposit. Samples are ready within 3 days.