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Views: 0 Author: Site Editor Publish Time: 2025-09-18 Origin: Site
In the fields of highly corrosive and high-purity industrial fluid transfer, plastic valves have become an irreplaceable alternative to metal valves due to their superior corrosion resistance, contamination-free nature, and cost-effectiveness. Correct selection is key to ensuring the safe, stable, and long-term operation of your system. This guide will help you understand how to choose the right plastic valve and highlights the properties and applications of our core products—PPH (Homopolymeric Polypropylene) and PVDF (Polyvinylidene Fluoride) valves.
Media Compatibility
Primary Factor: The chemical composition, concentration, and presence of impurities in the media must be clearly identified.
Selection Advice: Provide accurate media information, and our technical team will recommend the safest material match.
Temperature & Pressure
Operating Temperature: Different plastic materials have an optimal operating temperature range. Temperature directly affects the material's strength and corrosion resistance.
Operating Pressure: Consider both the pressure rating at ambient temperature and the pressure derating at the operating temperature.
Selection Advice: Always provide the maximum/minimum operating temperatures and pressure fluctuations of the system.
Valve Type & Operation Mode
Type: Select based on functional requirements: ball valves, butterfly valves, diaphragm valves, check valves, or globe valves.
Operation: Choose manual, pneumatic, or electric actuation based on operational frequency and automation needs.
Connection Type
Choose based on the existing piping system: Butt Weld, Union, Flange, or Threaded connections. Butt weld connections offer high strength and excellent sealing, making them the preferred choice for corrosive applications.
We specialize in the development and production of PPH and PVDF valves. Both are premium choices for highly corrosive applications, but their characteristics have different emphases.
| Property | PPH (Homopolymeric Polypropylene) | PVDF (Polyvinylidene Fluoride) | Selection Guide |
|---|---|---|---|
| Temp. Resistance | ★★★☆☆ High heat type up to ~90°C - 100°C | ★★★★★ Excellent, up to ~120°C - 140°C | PVDF is better suited for high-temperature applications. |
| Corrosion Resistance | ★★★★☆ Excellent resistance to most inorganic acids, alkalis, and salt solutions. | ★★★★★ Outstanding, broader chemical resistance. Withstands strong oxidizing acids and organic solvents. | PVDF has wider chemical compatibility, especially for harsh media like halogens (chlorine, bromine) and strong oxidizers. |
| Mechanical Strength | ★★★☆☆ Good, but can be brittle at low temperatures. | ★★★★☆ High mechanical strength, stiffness, creep resistance, and impact strength. | PVDF valves are more suitable for high-pressure applications, vibrating environments, or where high structural integrity is required. |
| Typical Applications | Environmental water treatment, acid/alkali transfer, wet process steps in electronics, and other mid-to-low temperature corrosive duties. | Ultra-pure chemical transfer, photovoltaic/semiconductor industry, plating baths, high-purity chemicals, high-temperature wastewater treatment. | Choose based on the media's corrosiveness, temperature, and purity requirements. |
Define Requirements: Gather the key parameters mentioned above (media, temperature, pressure, etc.).
Preliminary Material Selection: Based on the media and temperature, use the table above for an initial assessment of whether PPH or PVDF is suitable.
Determine Valve Type: Select the valve kind based on flow control needs, cycling frequency, and sealing requirements (e.g., diaphragm or globe valves for precise flow control; ball or butterfly valves for quick on/off).
Confirm Connection Type: Ensure compatibility with the existing piping. Butt Weld is recommended for reliable, corrosion-resistant connections.
Consult Experts: Provide your requirements to us. As a specialized manufacturer of PPH and PVDF valves, we can provide precise selection calculations, technical support, and tailored solutions.
Correct valve selection is the cornerstone of system safety. Choosing PPH or PVDF is not just selecting a material; it is choosing long-term reliability for your process.
Please contact our technical engineers for dedicated selection support and product catalogs.
Zixing Yuguang pipeline system co.,ltd
Specializing in the manufacture of high-performance PPH and PVDF plastic valves and solutions.
