PVDF Flat washer
PVDF Flat washer is a polymer engineering plastic with excellent chemical and weather resistance, urability, Purity, and Abrasion Resistance
M Size: M3-M30
peek plastic material: Polyvinylidene fluoride(PVDF)
product Type: washer
Finish: Natural/Black/Other Colors(Customizable)
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PVDF Flat washer Overview
PVDF Flat washer is a high-performance, semi-crystalline thermoplastic component made from Polyvinylidene Fluoride. PVDF is highly valued for its exceptional abrasion resistance, high purity, good mechanical strength, and excellent resistance to harsh chemicals, particularly halogens (like chlorine and bromine) and strong acids
Key Features
The unique properties of PVDF define the performance of the PVDF flat washer:
Superior Abrasion Resistance: PVDF has excellent resistance to wear, tearing, and abrasion—often better than other fluoropolymers and many plastics (flat washer nylon).
Broad Chemical Resistance: Highly resistant to many aggressive chemicals, particularly halogens, organic solvents, and strong acids (including hot sulfuric acid), where even stainless flat washer alloys may corrode.
Good Mechanical Strength: Offers significantly higher stiffness, tensile strength, and resistance to creep than PTFE, making it a reliable load-bearing component.
High Purity and Low Leaching: Used in cleanroom applications and pharmaceutical processing where maintaining fluid purity is critical.
High Thermal Stability: Maintains integrity at elevated service temperatures, typically up to 150°C (300°C).
UV and Weather Resistance: Excellent resistance to UV light and weathering, making it suitable for long-term outdoor exposure.
Key Polyvinylidene fluoride (PVDF) Properties
Advantages vs Disadvantages
| Category | ✅ Advantages (Pros) | ❌ Disadvantages (Cons) |
| Durability | Exceptional Abrasion/Wear Resistance. High Mechanical Strength (superior to PTFE). Excellent UV and Weather Resistance. | Cost: PVDF is a high-performance polymer, making the washers significantly more expensive than flat washer nylon or standard metal washers. |
| Chemicals | Broad Chemical Resistance, particularly to halogens, strong acids, and solvents. High Purity/Low Leaching. | Temperature Limit: While thermally stable, its maximum service temperature (approx. 150°C) is significantly lower than PEEK or PTFE (260°C). |
| Functionality | Good stiffness and resistance to creep under load. Reliable electrical insulator. | Limited Availability: Must be sourced from specialized polymer fastener suppliers, unlike commodity flat wash products. |
| Comparison | Better wear and mechanical strength than PTFE. Superior chemical and UV resistance to flat rubber washer and flat washer nylon. | Torque/Clamping: Requires careful installation torque to prevent crushing or thread damage, making it unsuitable for use with metal flat lock washer designs. |
Applications
PVDF Flat Washers are essential in industries that handle harsh chemicals, particularly halogens, and require components that can withstand mechanical wear.
Chemical Processing and Piping: Used extensively in pipelines, pumps, and valves handling highly corrosive chemicals, including concentrated acids and chlorine.
Semiconductor Manufacturing: Employed in ultra-pure water (UPW) systems and wet processing areas due to its low extractables and high purity.
Oil & Gas: Used in applications exposed to harsh downhole chemicals and solvents.
Outdoor/Architectural: Used in external fasteners where long-term UV resistance, weather resistance, and resistance to chemical cleaning agents are required.
Fastener Isolation: Used as a durable, non-conductive spacer to prevent galvanic corrosion between dissimilar metal fasteners and substrates.
Packaging & Delivery
Standard packaging includes PE bag, foam cover, and one double-deck corrugated outer carton for safety during transit. Delivery time is 5-15 working days depending on the quantity.