May. 06, 2024
Hardware
Leakage of fluids such as liquids and gases is a significant concern across industries where they are used in various industrial processes. To prevent this, manufacturers rely on different types of rubber seals and gaskets in equipment responsible for fluid transmission. Nowadays, rubber seals are integral to valves, pumps, pipe fittings, and vacuum seals. Are all rubber seals the same? No, they differ in designs, materials, and specifications. Therefore, several factors must be considered when designing seals for your industrial applications. This post outlines essential factors to consider during the construction of rubber seals and gaskets.
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Important Things to Consider When Designing Rubber Seals and Gaskets
Failure of a rubber seal or gasket may affect the performance of an application. Therefore, making the right choices is crucial. The following pointers will help you decide:
Considering these factors will help you achieve optimum sealing performance. If you need assistance, approach an experienced manufacturer like SSP Seals. They provide rubber gaskets and seals in various specifications to meet complex application requirements.
PEEK (Polyetheretherketone) is a high-performance engineering thermoplastic known for its exceptional mechanical, thermal, and chemical properties. This guide provides an in-depth understanding of PEEK, covering its advantages, disadvantages, applications, manufacturing process, design considerations, and future trends.
PEEK's characteristics stem from its polyetheretherketone properties. Its durability and broad temperature range, especially its high-temperature resistance, make it effective for many applications. Demand for PEEK is increasing as manufacturers need higher mechanical properties at lighter weights. PEEK can often be used as a metal alternative. Here are the key properties and drawbacks of PEEK:
● Excellent high-temperature resistance: PEEK can generally withstand up to 180°C continuous use. Some grades can continuously withstand up to 250°C, with a melting temperature of 343°C.
● Mechanical strength and high dimensional stability: PEEK offers strength, stiffness, creep, and fatigue resistance, enabling lightweight parts and better long-term performance.
● Lightweight: PEEK has a low density, about 1/5 to 1/6 the weight of metal.
● Chemical resistance: PEEK withstands many acids, bases, hydrocarbons, and organic solvents even at high temperatures.
● Electrical performance: PEEK has excellent electrical properties, making it suitable for electrical engineering and electronics.
● Thermal insulation: PEEK offers excellent thermal insulation due to its low coefficient of thermal conductivity.
● Hydrolysis resistance: PEEK does not hydrolyze in water, even at high temperatures.
● Recyclable: PEEK is recyclable and halogen-free, complying with the European RoHS directive and REACH.
● Cost: PEEK is relatively expensive compared to other thermoplastics.
● Processing Challenges: PEEK’s high melting point requires specialized equipment and techniques for processing.
● Limited Availability: PEEK may have limited availability in certain regions, leading to longer lead times or higher costs.
● Low resistance to UV: PEEK is susceptible to UV degradation, though UV stabilizers can mitigate this issue.
● Limited Color Options: PEEK is typically available in natural (light brown) or black, offering limited color variations.
PEEK is used in various industries due to its properties:
● Aerospace: Structural parts, brackets, electrical connectors, cable insulation, and fuel system components.
● Automotive: Engine components, electrical connectors, fuel system parts, piston parts, and bearings.
● Oil and Gas: Downhole equipment, pump components, valves, seals, and electrical connectors.
● Electrical and Electronics: Insulation materials, connectors, sockets, circuit boards, cable insulation, and high-temperature wire coatings.
● Medical and Dental: Biocompatible PEEK is used for implants, surgical instruments, and orthopedic devices.
● Chemical Processing: Pumps, valves, seals, gaskets, and connectors.
● Food Processing: Conveyor belts, gears, bearings, and seals.
PEEK manufacturing involves polymerization, post-processing, and additional treatments:
1. Monomer Synthesis: Para-difluorobenzene (p-DFB) and 4,4'-difluorobenzophenone (DFBP) are synthesized through chemical reactions.
2. Polymerization: The monomers undergo high-temperature polymerization to form polymer chains.
3. Post-Processing: PEEK resin pellets are melted and shaped through extrusion, injection molding, or machining.
4. Additional Treatments: Treatments like annealing and surface coatings enhance properties.
Consider these factors for optimal PEEK component performance:
● Mechanical Loads and Stresses: Design for strength, stiffness, and load-bearing capabilities.
● Thermal Stability: Account for the operating temperature range and design for thermal conditions.
● Chemical Resistance: Ensure compatibility with the chemical environment.
● Machining Challenges: Use appropriate tooling and techniques for precision machining.
Future advancements in PEEK technology include improved processing techniques, enhanced reinforcement, surface modifications, and advanced testing and simulation.
Free CADs and samples are available for most solutions. Our experts can advise you on the best solutions for your application.
Questions?
Email us at sales@essentracomponents.co.uk or speak to one of our experts at 0345 528 0474.
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