Plastics for Valves, Seals, and Fittings

Water treatment, chemical processing, food manufacturing, mining, oil and gas, and many other industries use valves, seals, and fittings to control, direct, and regulate the flow of fluids and gases. These components appear in hydraulic and pneumatic systems, filling equipment, cooling and lubrication lines, and residential products such as sinks, washing machines, and sprinkler systems.

Plastics for valves, seals, and fittings resist corrosion, weigh less than metal, and do not conduct electricity. In many chemical and water applications, thermoplastic parts outlast metal parts that would corrode or scale. Different plastics offer different levels of chemical resistance, temperature performance, and dimensional stability, so material choice depends on the fluid, the operating temperature, and the tolerances the part must hold.

Valve bodies and fittings are commonly machined or fabricated from sheet, rod, and tube. Seats, seals, and backup rings require materials that conform to mating surfaces while keeping their shape and strength. Piedmont Plastics supplies thermoplastic materials for valve bodies, fittings, seats, seals, and other flow control components.

Material Options

Piedmont Plastics supplies performance plastic materials for valves, seals, fittings, and other flow control components.

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Corporate Home Office: Piedmont Plastics, Inc. · 5010 W. W.T. Harris Blvd., Charlotte, NC 28269 · (800) 277-7898 · Privacy Policy

What You Should Know...

Material Performance Requirements

Dimensional Stability

Holds its size and shape in service.
Chemical Compatibility

Resists process fluids and gases without degrading.
Sealing Performance

Flexible enough to conform, strong enough to hold a seal.
Temperature Resistance

Keeps its mechanical properties at operating temps.

Why Piedmont?

**Our Solutions and Services**

For more than 50 years, Piedmont Plastics has been a trusted source for high-performance materials, industry solutions, and value-added services.

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Wholesale Distribution

A trusted wholesale supplier with a broad selection of sheet, rod, and tube for valve and fitting fabrication.

Local Inventory

Products stocked at locations across North America for fast, convenient access.

Material Options

A wide inventory of thermoplastics covering a range of chemical, temperature, and wear requirements.

Industry Expertise

Speak with a knowledgeable sales team that understands the products and the industry.

Frequently Asked Questions

CPVC handles service up to about 200°F and PVDF up to about 280°F. PEEK and PTFE handle service near 500°F. Service temperature drops as pressure increases, so confirm ratings for your part design. These temperatures are also averages, and can vary depending on the manufacturer.

PTFE resists nearly all industrial chemicals. PVDF resists strong acids, halogens, and most solvents at a lower cost than PTFE. Polypropylene is a lower-cost option for most acids and bases.

Common plastics for valves, seals, and fittings include PVC, CPVC, polypropylene, PVDF, nylon, acetal, PTFE, and PEEK. The right material depends on the fluid, operating temperature, pressure, and required tolerances.

Polypropylene, PVDF, acetal, nylon, PTFE, and PEEK all have FDA-compliant grades for valves and fittings. Confirm the specific grade when ordering, since not every material comes standard with FDA compliance.

Plastic valves and fittings do not corrode or scale, weigh less than metal, and do not conduct electricity. In many chemical and water systems, they outlast metal parts and cost less to replace.

Use PTFE for chemical resistance and low friction. Use PEEK for high temperatures and pressures. Acetal holds tight tolerances in wet service, and nylon offers toughness and wear resistance at a lower cost. These are all general statements and may vary depending on your application. Talk with your Piedmont Plastics sales representative before making a decision.