Core Characteristics of PVDF Needle Valves
The core of a PVDF needle valve lies in its critical components, such as the valve body and stem, being manufactured from Polyvinylidene Fluoride (PVDF) plastic. This material gives it several outstanding advantages:
Excellent Chemical Corrosion Resistance
PVDF material can withstand corrosion from most strong acids, alkalis, halogens, and organic solvents. Its corrosion resistance is far superior to many metals and common plastics. This is its most critical advantage.
High Purity and Low Leachables
The material itself is very clean, unlikely to contaminate fluids, and has extremely low levels of leachable substances. This makes it an ideal choice for industries with extremely high purity requirements, such as ultrapure water systems, semiconductor wet processes, biopharmaceuticals, and food and beverage.
Precise Flow Control
The design feature of a "needle valve" is a needle-like, tapered stem. By rotating the handwheel, the opening of the stem can be adjusted very finely, enabling precise modulation and control of fluid flow rates, rather than simply being used for on/off service in pipelines.
Main Application Areas
Chemical Dosing and Metering: Precisely controlling the addition of corrosive chemicals.
Ultrapure Water Systems: Used for sampling or branches requiring fine adjustment.
Semiconductor and Electronics Industry: Controlling the flow of high-purity chemicals in processes like wafer cleaning and etching.
Environmental Water Treatment: Used for adding regulating agents like acids and bases.
