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Acetal polymers are semi-crystalline. They offer excellent inherent lubricity, fatigue resistance, and chemical resistance. Acetals suffer from outgassing problems at elevated temperatures, and are brittle at low temperatures. Glass-filled and added lubrication grades are available, flame-retardant grades are not. Brand names for acetal polymers include Celcon® (Hoechst Celanese), Delrin® (Dupont), Thermocomp® (LNP), Ultraform® (BASF), and Acetron® (DSM). Products & Services
Check valves are self-activating safety valves that permit gases and liquids to flow in only one direction, preventing process flow from reversing. They are classified as one-way directional valves.
Pressure relief valves are self-actuated safety valves designed to relieve excess pressure upstream from the line.
Control valves or proportional valves are power-operated devices used to modify fluid flow or pressure rate in a process system.
Gate valves and knife valves are linear motion valves in which a flat closure element slides into the media stream to shut off flow.
Globe valves are linear motion valves with rounded bodies, from which their name is derived. They are widely used in industry to regulate fluid flow in both on/off and throttling service.
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Topics of Interest
Delrin® refers to a class of acetal homopolymers from DuPont. They offer high tensile strength, impact resistance and stiffness, and outstanding fatigue endurance. They are resistant to moisture,...
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Virtually all thermoplastic polymers can be welded to themselves utilizing the vibration welding technique. Vibration welding also offers the largest range of welding of dissimilar materials, as well...
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Polyacetal is a polyether derived from aldehydes or ketones. It provides greater strength than polyethyelen-type polymers, but is susceptible to oxidation at elevated temperatures. The most common...
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Oxidizing agents such as chlorine and chloramines are used to treat drinking water in the United States by preventing the growth of microorganisms. Many thermoplastics are susceptible to oxidation and...
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Ethylene propylene (EPDM) offers good resistance to sunlight, weathering, and ozone. It has poor resistance to petroleum oils and fuel. EPDM provides good heat and compression set resistance.
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Technical Articles
Materials: Kerkite® Composite Polymers
- Drive Components
Properties of a Barrel
- Calculators
Properties of a Cone
- Calculators
Properties of a Cylinder
- Calculators
Properties of a Hollow Cylinder
- Calculators
Properties of a Sector of a Sphere
- Calculators
Properties of a Sphere With Cylindrical Boring
- Calculators
Properties of a Torus
- Calculators
Design of Plastic Gears
- Gears and Gearing
Lasermarkable Engineering Resins
- Plastics, Elastomers and Polymers
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