10 Factors Why PEEK Machined Seats and Seals Are The Material of Choice

August 24, 2024

In modern industry, a variety of seals play a vital role in ensuring the proper functioning of equipment and preventing leaks and malfunctions. Among the many sealing materials, PEEK seals stand out for their excellent performance and have become a worthy all-rounder. Next, let's take a closer look at how PEEK seals can make a big difference in different areas.

Performance Advantages of PEEK Seals

PEEK is a high-performance special engineering plastics, with excellent mechanical properties, high temperature resistance, chemical resistance, wear resistance and self-lubricating properties. These excellent properties make PEEK seals in a variety of harsh working environment can maintain a good sealing effect.

Outstanding Mechanical Properties

PEEK has high strength, high rigidity and good toughness, and its tensile strength, bending strength and impact strength are much higher than general engineering plastics. This makes PEEK seals able to withstand greater pressure and impact, not easy to deformation and rupture.

For example, in high-pressure hydraulic systems, PEEK seals are able to maintain sealing performance under pressures of up to thousands of pounds, ensuring the safe operation of the system.

Excellent High Temperature Resistance

PEEK has a long term service temperature of 260°C and a short term service temperature of 300°C or more. This high-temperature resistance allows PEEK seals to maintain good sealing performance in high-temperature environments, such as aerospace and automotive engines, without softening, deforming, or losing elasticity due to high temperatures.

Good Chemical Resistance

PEEK has good resistance to most chemicals, including strong acids, strong bases, and organic solvents. This makes PEEK seals in the chemical industry, petrochemical industry and other fields can resist the erosion of various corrosive media, to extend the service life of the seal.

For example, at the piping connections in chemical plants, PEEK seals can effectively prevent the leakage of chemical substances and protect the environment and the safety of personnel.

Excellent wear resistance

PEEK has a low coefficient of friction and good abrasion resistance, and is able to maintain good performance under prolonged friction and wear conditions. This enables PEEK seals to effectively reduce wear and improve sealing reliability in equipment that requires frequent movement and friction, such as valves and pumps.

Self-lubrication

PEEK itself has a certain degree of self-lubrication, without the need to add additional lubricants, reducing the contamination of the lubricant on the working medium, but also reduces the maintenance cost.

Selecting the right plastic material for seats and seals is critical to ensuring the reliability and long-term service life of your valves. Specialty engineering plastics PEEK Machined Parts are commonly used in industries such as aerospace, medical and semiconductor.

Engineers typically consider several factors when developing products:

1. Compression modulus of PEEK seals

PEEK has excellent sealing properties and covers metal surfaces well, yet is hard enough to apply pressure with a good seal.

2. Low coefficient of friction (COF)

When a PEEK valve is in sliding contact with a metal surface, the COF must be low enough to achieve the required braking torque.

3. PEEK has creep resistance properties

Peek seals are able to resist creep and maintain an effective sealing function over time.

4. Peek processed parts have the ability to adapt to the temperature

PEEK seals will not become brittle at low or variable temperatures.

5. Process fluid degradation resistance

When exposed to process fluids, peek injection molded parts can resist chemical attack and environmental stress cracking.

6. No contamination of process fluids

Fluid handling pressure regulator PEEK processed parts will not leach or release chemicals that may contaminate process fluids.

7. Flammable properties

For controlling the flow of flammable materials valve, PEEK injection molded parts may need to have certain flammability characteristics

8. Fatigue resistance

PEEK material processing needs to have good fatigue resistance in order to withstand the cyclic stresses associated with repeated actuation.

9. Certifications

For some industries, such as food processing, PEEK machined parts meet industry standards such as FDA, ISO or USP.

10. Cost

Compared to imported materials or other metallic materials, peek's ability to be used over long periods of time reduces the cost of post maintenance and product renewal iterations, making it a practical choice for PEEK valves.

Author:

Ms. Tina

E-mail:

sales@honyplastic.com

Phone/WhatsApp:

+86 18680371609