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PVC Valve VS PP Valve VS UPVC Valve

What Is A Plastic Valve

A plastic valve is a fluid control device, primarily made of corrosion-resistant plastic materials, used to regulate, cut off or control the flow of fluid in a piping system. These valves are usually lightweight, corrosion-resistant, and non-conductive, and are suitable for a variety of industrial and civil applications, including chemical, water treatment, medical, food processing, etc. Their design and material selection can be customized to meet the needs of specific applications

Advantages Of Plastic Valves

Plastic valves have many advantages, including strong corrosion resistance, light weight easy to install, non-conductive, cost-effective, a variety of material choices, not easy to rust, easy to process, reduce vibration and noise, recyclability and other characteristics. These advantages make plastic valves ideal for many applications, especially where corrosion resistance, lightweight and economical fluid control systems are required.


● PVC is the abbreviation of Polyvinyl Chloride, which is an important plastic material. It is made by polymerization of chlorine gas and ethylene in the presence of a catalyst.

Dombar valve

Source: Dombar

● PP, which stands for Polypropylene, is a kind of thermoplastic. Polypropylene is made by polymerizing propylene monomers and is a lightweight, strong, corrosion-resistant material with excellent heat resistance and chemical stability


Source: LIPSON

● UPVC is the abbreviation of Unplasticized Polyvinyl Chloride, also known as rigid PVC. Compared to ordinary PVC (polyvinyl chloride), UPVC does not contain plasticizers and is therefore more hardened and stable

Covan valve

Source: Covna

The Difference Between PVC, PP, UPVC Valves

Material composition:

PVC (polyvinyl chloride) : is a common plastic that has good corrosion resistance and is suitable for general purpose valves, especially in water supply and drainage systems.

PP (polypropylene) : With good chemical resistance, PP valves are a common choice for some applications that require high chemical stability, such as acid-base media treatment.

UPVC (Rigid polyvinyl chloride) : A type of PVC, UPVC does not contain plasticizers, is relatively harder and more stable, suitable for applications requiring rigidity and stability, such as piping systems, Windows, door frames, etc.

Corrosion resistance:

PVC: Good corrosion resistance, suitable for general water treatment and water supply systems.

PP: Has good chemical resistance, and has better resistance to some more corrosive chemical media.

UPVC: Also has good corrosion resistance, especially suitable for some chemical and water treatment applications.


PVC: Suitable for general water supply, drainage and some light industrial applications.

PP: Suitable for occasions with high requirements for chemical corrosion, such as chemical industry.

UPVC: Suitable for applications that require hardness and stability, such as piping systems, building materials, etc.

Temperature range:

PVC: Generally suitable for the temperature range of 0°C to 60°C.

PP: has good high temperature resistance, suitable for high temperature environment, generally can reach 80°C to 100°C range.

UPVC: Usually suitable for the temperature range from 0°C to 60°C.


PVC: Relatively soft, not as hard as UPVC.

PP: Generally hard.

UPVC: Harder, more suitable for applications that require rigidity and stability.

PVC, PP, UPVC valve applications

Application of PP valve:

Chemical industry: PP valve has good corrosion resistance and is often used in the chemical industry to deal with acid and alkaline media.

Pharmaceutical industry: Due to its chemical inertness and hygienic properties, PP valves are also widely used in the pharmaceutical industry.

Food processing: Food-grade PP valves are suitable for food, beverage and other industries, in line with health requirements.

Application of PVC valve:

Water treatment: PVC valves are widely used in tap water treatment, sewage treatment and drainage systems.

Construction industry: In the construction industry, PVC valves are used for water supply, drainage, air conditioning systems, etc.

Power industry: PVC valves are commonly used in chemical transportation and wastewater treatment in power systems.

Application of UPVC valve:

Chemical industry: UPVC valve, due to its vulcanization treatment, is suitable for chemical industry with high requirements for chemical corrosion.

Water treatment: UPVC valves can be used in water supply systems, wastewater treatment, especially in environments where high corrosion resistance is required.

Special media: For some special media, require to work under certain temperature and corrosive conditions, choose UPVC valve is more appropriate.

PVC valves are the most widely used due to their comprehensive performance and low cost

Advantages and disadvantages of PVC,PP,UPVC valves

PVC Valve:

● Advantages:

Corrosion resistance: PVC has good corrosion resistance, especially strong resistance to acids and alkalis.

Low cost: PVC is a relatively inexpensive material suitable for projects with limited budgets.

Electrical insulation: PVC is an electrical insulator, suitable for applications such as electrical equipment accessories.

Lightweight: PVC is a lightweight material that is easy to install and handle.

● Disadvantages:

Temperature limitation: PVC has a narrow temperature range and is not suitable for high temperature environments.

High pressure intolerance: Under high pressure conditions, the performance of PVC valves may be limited.

PP Valve:

● Advantages:

Good corrosion resistance: PP has good corrosion resistance to most chemicals.

High impact resistance: PP has high impact resistance and is more suitable for some rough operating environments.

High heat resistance: PP has a high melting point and good heat resistance.

Electrical insulation: Similar to PVC, PP is also an electrical insulator.

● Disadvantages:

Relatively high cost: PP has a high cost compared to PVC.

Sensitive to ultraviolet light: PP is sensitive to ultraviolet light and may have aging problems when exposed to sunlight for a long time.

UPVC Valve:

● Advantages:

Corrosion resistance: Similar to PVC, UPVC also has good corrosion resistance.

Heat resistance: UPVC has better heat resistance than ordinary PVC.

Electrical insulation: Like PVC and PP, UPVC is also an electrical insulator.

● Disadvantages:

Relatively high cost: UPVC costs more relative to PVC, but slightly less than PP

In Which Case Choose PVC,PP,UPVC Valves Respectively

Selection of PVC valves:

Low cost requirements: If the project budget is more limited, PVC is a relatively affordable option.

Low temperature environment: When the operating environment temperature is low and the medium does not affect the cold resistance of PVC, PVC valve is a suitable choice.

General corrosion resistance requirements: When the corrosion resistance requirements of PVC are not particularly high, PVC is a common choice.

Selection of PP valves:

High corrosion resistance: PP has good corrosion resistance to chemical substances such as acid and alkali, and is suitable for environments requiring high corrosion resistance.

High impact resistance requirements: In some applications where high impact resistance is required, PP valves may be a suitable choice.

Medium temperature environment: PP performs better at medium temperature and is suitable for general temperature environment.

Selection of UPVC valves:

High temperature environment: UPVC has better heat resistance than ordinary PVC, and is suitable for some higher temperature working environments.

High corrosion resistance requirements: Similar to PVC, UPVC also has good corrosion resistance to chemical substances such as acid and alkali.

General cost considerations: If the project budget allows and better heat resistance is required, UPVC is an option to consider.


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