As the requirements for pipeline systems in global water treatment, chemical industry and municipal engineering continue to increase, the market demand for 10 check valve(DN250) continues to grow. Among them, check valves made of HDPE (high-density polyethylene) and PVC (polyvinyl chloride) occupy an important position in different application scenarios due to their respective advantages.
HDPE check valve: corrosion-resistant, lightweight, suitable for harsh environments
The 10 check valve made of HDPE is popular in sewage treatment, seawater desalination and chemical industries due to its excellent chemical corrosion resistance and lightweight design. Compared with traditional metal valves, HDPE check valves have the following advantages:
Strong corrosion resistance: It can withstand chemical media such as acids, alkalis, and salts, and is suitable for chemical wastewater treatment and seawater cooling systems.
Light weight and easy installation: The weight is only 1/8 of that of metal valves, which greatly reduces transportation and installation costs.
Good impact resistance: HDPE material has high toughness and can withstand certain pressure shocks, and is suitable for non-excavation construction (such as drag pipe technology).
However, the high temperature resistance of HDPE check valves is weak, and it is usually suitable for working environments of -40℃~60℃, and is not suitable for high-temperature steam or high-pressure oil and gas transportation.
PVC check valve: low cost, easy processing, suitable for mild media
PVC check valves dominate water treatment, agricultural irrigation and general municipal drainage systems due to their low cost and easy processing. Its features include:
Affordable: PVC valves are usually cheaper than HDPE and metal valves, suitable for projects with limited budgets.
Good corrosion resistance: suitable for water treatment, sewage treatment and mild chemical media transportation.
Easy installation and maintenance: PVC valves can be connected by gluing or flanges, with high construction efficiency.
However, PVC check valves have low mechanical strength, are easily damaged by external impact, and have a narrow temperature resistance range (0℃~60℃), which is not suitable for high temperature or high pressure environments.
Market trend: HDPE grows strongly, PVC still dominates
According to industry analysis, the global plastic check valve market size is expected to exceed US$5 billion in 2025, including:
Due to environmental protection policies, the application growth rate of HDPE check valves in sewage treatment, seawater desalination and other fields has reached 8%.
PVC check valves still occupy more than 60% of the market share, mainly due to their low cost and mature manufacturing process.
Conclusion: The material selection of 10-inch check valves needs to comprehensively consider corrosion resistance, cost, temperature and pressure requirements. HDPE is suitable for harsh environments, while PVC is more cost-effective in medium and low pressure and mild medium scenarios. In the future, with the breakthrough of new material technology, the application scope of plastic check valves will be further expanded.
