PVDF Butterfly Valve

PVDF butterfly valves give you compact, quarter-turn control of large-bore corrosive lines — DN50 to DN500 — in wafer and lug bodies with a PVDF disc and an EPDM or FKM seat. They are the space-saving, economical choice for big-flow isolation and throttling where a ball or diaphragm valve would be bulky and costly.

A butterfly valve seals with a disc that rotates a quarter turn inside an elastomer-lined body, so it is light, short face-to-face, and well suited to large diameters. On our valves the disc is moulded in the same PVDF as the body, and the stem is 304 or 316 stainless steel.

PVDF chemical compatibility (seat-dependent)

PVDF resists a wide range of concentrated acids, halogens, and oxidizers — but on a butterfly valve the seat is an elastomer (EPDM or FKM) that contacts the media, so the seat, not the PVDF body and disc, sets the chemical limit. PVDF butterfly valves suit large-bore corrosive and chlor-alkali duty where an EPDM or FKM seat is appropriate — scrubber recirculation, moderate-acid headers, and process cooling.

For the most aggressive media — hydrofluoric acid, concentrated or fuming acids, or ultrapure service — a PTFE-seated valve is the right choice. Use our PVDF diaphragm valve or PVDF ball valve for those duties, and see our PVDF chemical resistance guide for the full PVDF material picture.

Wafer or lug?

Wafer valves are clamped between two pipe flanges by bolts that pass around the body — the most economical and lightest option. Both flanges must stay in place, so a wafer valve cannot dead-end a line or isolate one side while you remove downstream piping.

Lug valves have threaded lug holes so each flange bolts directly to the valve body. The valve can be installed or removed from one side and used for dead-end service and end-of-line isolation, letting you service downstream piping while the upstream stays in operation (at a reduced dead-end pressure rating).

Operation

Sizes DN50–DN200 use a lever with a notched lock plate that sets the disc in 5° increments for repeatable throttling. Sizes DN250–DN500 use a worm-gear handwheel for easy operation at large bore; the gear operator is also available on smaller sizes for fine control.

Why our PVDF butterfly valves

• Improved seat design for excellent, reliable sealing.
• Thickened body with reinforcing ribs and no hollow sections, engineered against stress concentration for strength in demanding service.
• Precise 5° opening control from the lever lock plate, for repeatable throttling.
• PVDF disc in the same virgin resin as the body; 304 or 316 stainless steel stem; EPDM or FKM seat selected to your media.
• Virgin branded resin and factory-direct supply.

Configurations and specifications

Body / disc material	PVDF (disc same as body; virgin branded resin)
Body style	Wafer or lug
Size range	DN50–DN500
Pressure rating	PN10 (derates with temperature)
Max temperature	~120 °C (seat may limit)
Seat	EPDM or FKM
Stem	304 or 316 stainless steel
Flange compatibility	ANSI Class 150 / DIN / JIS
Operation	Lever (DN50–DN200) / worm gear (DN250–DN500)

Typical applications

PVDF butterfly valves suit large-bore corrosive duty: scrubber recirculation lines, chlor-alkali headers, moderate-acid process mains, and large cooling-water lines where corrosion resistance matters. To weigh PVDF against the other thermoplastics, see our plastic valve material selection guide.

Why buy PVDF butterfly valves from Huiya

Our PVDF butterfly valves are built for large-bore corrosive and chlor-alkali lines, supplied factory-direct — so you get the right configuration, competitive pricing, and a fast reply with no trading-company markup.

• ✅ Factory-direct — our own 2,000+ m² plant in Zhejiang, no middleman
• ✅ 100% virgin branded resin, fully traceable; produced at an ISO 9001-certified facility; material test reports on request
• ✅ Low MOQ — 20 pieces; samples available; OEM / custom welcome
• ✅ Fast lead time — about 7 days standard, 14 days custom
• ✅ 12-month warranty

Frequently asked questions