PPH Valves

PPH valves (polypropylene homopolymer) are the cost-effective answer to hot caustic and alkaline service. Where sodium hydroxide and other alkaline media attack lesser plastics, PPH stays stable up to 85°C — which is why chlor-alkali plants and caustic-handling systems run on it. Huiya manufactures pneumatic PPH true-union ball valves, flanged ball valves and butterfly valves to ANSI, DIN and JIS standards, with matching PPH pipes and fittings for a complete single-source system, supplied factory-direct. For hot alkaline duty, PPH is usually the most economical material that survives the job — keeping PVDF in reserve for concentrated acids— compare them in how to choose the right valve material. Send us your media, concentration and temperature and we’ll confirm PPH is the right choice.

PPH Valves — Frequently Asked Questions

What media are PPH valves best for?

PPH (polypropylene homopolymer) excels in hot caustic and alkaline service — sodium hydroxide, potassium hydroxide and similar solutions up to 85°C. It is the material of choice wherever alkaline media would attack other plastics, particularly in chlor-alkali production and caustic dosing systems.

Can PPH valves handle caustic soda (sodium hydroxide)?

Yes. PPH is highly resistant to hot sodium hydroxide and other strong alkalis, which is exactly why chlor-alkali plants rely on it. Share your concentration and temperature and we will confirm PPH suits your specific caustic service.

PPH or PVDF for caustic service — which should I choose?

For hot alkaline media, PPH is usually the most economical material that does the job, so it is the smart default for caustic duty. PVDF is reserved for concentrated acids and solvents where PPH will not survive. For caustic service specifically, PPH almost always wins on value.