Chemical Processing

Chemical Duty Valves And Fittings For Every Stage Of The Plant

A chemical plant runs on fluid that eats through materials quietly. Chlorine, hydrochloric acid, caustic soda and organic solvents each attack polymers in a different way, and a grade that survives one will crack on another. The failure is never sudden — it is slow wall thinning, stress cracking around the seat, or a seal that starts to weep and lets the process leak into the wrong stream.

That is why valve selection on a chemical line is decided by three things together: the fluid, its concentration, and the working temperature. Pick any one of them wrong and the component is scrap regardless of how well it is machined. The products below are the ones we actually ship for chemical service — lined and solid-polymer valves with PTFE seats, and a matching fitting range so an entire transfer run can be built in a single material family.

Selecting The Right Product By Duty

Material Guide — PP, PPRC And PVDF

PP is the economical choice for dilute acids, dilute alkalis, water treatment chemicals and general process water. It is easy to fabricate and easy to weld on site, which is why it remains the default for long runs of pipe and fittings.

PPRC covers the middle band: chlorinated water, hypochlorite, moderate alkalis and many organic solvents at a noticeably lower cost than PVDF. It is the usual answer for chlorination and dosing rooms in water treatment plants.

PVDF is the correct answer for the most aggressive duties — concentrated acids, strong caustics, chlorine and the organic solvents that attack every other polymer on the list. If compatibility is not obvious, send us the fluid, concentration and temperature and we will confirm the grade in writing before you order.

Built To Match Existing Plant Piping

Most chemical projects are not greenfield. The pump skid is already there, the line size is fixed, and the replacement has to bolt straight in. That is why we keep flanged ends, threaded collar flanges, equal and reducing tees, and a matching bend and flange schedule in PP, PPRC and PVDF — so a single valve can be replaced without changing the pipe around it. Share the existing flange standard, bolt size and face-to-face dimension and we will confirm the matching part number.

Quality, Packing And Export

Poonam Valves has manufactured irrigation and industrial valves from Ahmedabad since 1996. Chemical duty components are supplied in virgin grade polymer with no regrind or fillers, so batch behaviour stays consistent season after season. Material grades, working pressure options and certification documents are shared on request, and every export order ships with export packing and test documentation. Our export desk replies to chemical enquiries within 24 hours with FOB or CIF pricing.