CPVC Butterfly Valve (C-PVC)
CPVC butterfly valves (C-PVC) give you compact, quarter-turn control of large-bore hot and corrosive lines — DN50 to DN500 — in wafer and lug bodies with a CPVC disc and an EPDM or FKM seat. They hold up to about 90 °C, the space-saving, economical choice for big-flow isolation and throttling on hot water, bleach, and chemical mains.
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 CPVC as the body, and the stem is 304 or 316 stainless steel.
CPVC chemical compatibility (seat-dependent)
CPVC is rated to about 90 °C and is strong on hot acidic and oxidising media. On a butterfly valve, though, the seat is an elastomer (EPDM or FKM) that contacts the media, so the seat sets the chemical limit alongside the CPVC body and disc — choose FKM for hot or more chemically demanding service.
CPVC butterfly valves suit large-bore hot water, sodium hypochlorite (bleach), chlor-alkali wastewater, and moderate hot-acid mains. For strong or concentrated acids — where you need a PTFE-seated valve — use our CPVC ball valve or a diaphragm valve instead. See our chemical resistance reference for more.
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 CPVC 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 hot, demanding service.
- Precise 5° opening control from the lever lock plate, for repeatable throttling.
- CPVC 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 | CPVC (disc same as body; virgin branded resin) |
| Body style | Wafer or lug |
| Size range | DN50–DN500 |
| Pressure rating | PN10 (derates with temperature) |
| Max temperature | ~90 °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) |
| No. | Parts | Materials |
|---|---|---|
| 1 | Handle | ABS, PPG, EL-PP |
| 2 | Locking Plate | PPG, FRPP |
| 3 | Stem | Steel, Stainless Steel, Titanium Alloy, Hastelloy |
| 4 | O-ring | EPDM, FPM, FFKM |
| 5 | Seat | EPDM, FPM |
| 6 | Disc | CPVC |
| 7 | Sealing Gasket | PTFE, EPDM, FPM, FFKM |
| 8 | Body | CPVC |
Dimensions
Lever-Operated Butterfly Valve — Dimensions (mm)
| DN | d | D (flange O.D.) | L | n (bolt holes) | W | H1 | H2 | H3 | A | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GB/DIN | JIS | ANSI | GB/DIN | JIS | ANSI | ||||||||
| 25 | 35 | 85 | 90 | 79 | 37 | 4 | 4 | 4 | 125 | 72 | – | 56 | 220 |
| 32 | 35 | 100 | 100 | 89 | 37 | 4 | 4 | 4 | 125 | 72 | – | 56 | 220 |
| 40 | 47 | 110 | 105 | 98 | 38 | 4 | 4 | 4 | 150 | 86 | – | 56 | 220 |
| 50 | 56 | 125 | 120 | 121 | 40 | 4 | 4 | 4 | 160 | 80 | 108 | 56 | 220 |
| 65 | 70 | 145 | 140 | 140 | 45 | 4 | 4 | 4 | 175 | 88 | 118 | 56 | 220 |
| 80 | 80 | 160 | 150 | 152 | 47 | 8 | 8 | 4 | 195 | 98 | 130 | 75 | 250 |
| 100 | 100 | 180 | 175 | 190 | 56 | 8 | 8 | 8 | 225 | 112 | 145 | 75 | 250 |
| 125 | 125 | 210 | 210 | 216 | 62 | 8 | 8 | 8 | 253 | 126 | 162 | 77 | 300 |
| 150 | 150 | 240 | 240 | 241 | 67 | 8 | 8 | 8 | 277 | 138 | 177 | 77 | 300 |
| 200 | 200 | 295 | 290 | 298 | 86 | 8 | 12 | 8 | 330 | 165 | 210 | 77 | 300/400 |
All dimensions in mm. Body rating PN10 (1.0 MPa) across all sizes. D = flange outside diameter to GB/DIN, JIS or ANSI drilling; L = face-to-face length; n = number of bolt holes. W, H1, H2, H3 and A refer to the dimension drawing.
| No. | Parts | Materials |
|---|---|---|
| 1 | Handle | ABS, PPG, EL-PP |
| 2 | Locking Plate | PPG, FRPP |
| 3 | Stem | Steel, Stainless Steel, Titanium Alloy, Hastelloy |
| 4 | O-ring | EPDM, FPM, FFKM |
| 5 | Seat | EPDM, FPM |
| 6 | Disc | CPVC |
| 7 | Sealing Gasket | PTFE, EPDM, FPM, FFKM |
| 8 | Body | CPVC |
Dimensions
Gear-Operated (Worm Gear) Butterfly Valve — Dimensions (mm)
| DN | d | D (flange O.D.) | L | n (bolt holes) | H1 | H2 | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| GB/DIN | JIS | ANSI | GB/DIN | JIS | ANSI | |||||
| 80 | 80 | 160 | 150 | 152 | 47 | 8 | 8 | 4 | 98 | 130 |
| 100 | 100 | 180 | 175 | 190 | 56 | 8 | 8 | 8 | 112 | 145 |
| 125 | 125 | 210 | 210 | 216 | 62 | 8 | 8 | 8 | 126 | 162 |
| 150 | 150 | 240 | 240 | 241 | 67 | 8 | 8 | 8 | 138 | 177 |
| 200 | 200 | 295 | 290 | 298 | 86 | 8 | 12 | 8 | 165 | 210 |
| 250 | 250 | 350 | 355 | 362 | 105 | 12 | 12 | 12 | 204 | 260 |
| 300 | 307 | 400 | 400 | 432 | 120 | 12 | 16* | 12 | 238 | 270 |
| 350 | 358 | 460 | 445 | 476 | 130 | 16 | 16 | 12* | 266 | 300 |
| 400 | 389 | 515 | 510 | 540 | 140 | 16 | 16 | 16 | 308 | 350 |
| 450 | 446 | 565 | 565 | 578 | 152 | 20 | 20 | 16* | 320 | 370 |
| 500 | 494 | 620 | 620 | 635 | 155 | 20 | 20 | 20 | 345 | 400 |
| 600 | 590 | 725 | 730 | 749 | 175 | 20 | 24* | 20 | 405 | 460 |
All dimensions in mm. Body rating PN10 (1.0 MPa) across all sizes. D = flange outside diameter to GB/DIN, JIS or ANSI drilling; L = face-to-face length; n = number of bolt holes; H1, H2 = heights per the drawing. * non-standard drilling — please confirm the bolt pattern when ordering.
Typical applications
CPVC butterfly valves suit large-bore hot and oxidising duty: hot-water mains, sodium hypochlorite and bleach lines, chlor-alkali wastewater headers, and moderate hot-acid process mains. To weigh CPVC against the other thermoplastics, see our plastic valve material selection guide.
Proven in the field: see how our CPVC valves cut installation cost 38% at an Indonesian copper smelter.
Why buy CPVC butterfly valves from Huiya
Our CPVC butterfly valves are built for large-bore hot water, bleach, and chemical mains, 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
Get a factory-direct quote
Send us your medium, its concentration and temperature, and the line size. Our engineers confirm the right body material, seat and valve type — and reply within 24 hours.
Frequently asked questions
What is a CPVC butterfly valve used for?
CPVC butterfly valves provide compact quarter-turn isolation and throttling of large-bore hot and corrosive lines — hot-water mains, bleach lines, and chlor-alkali wastewater — to about 90 °C, from DN50 to DN500.
What temperature and chemicals can a CPVC butterfly valve handle?
CPVC is rated to about 90 °C, but the elastomer seat (EPDM or FKM) sets the chemical limit on a butterfly valve — choose FKM for hot or chemically demanding media. For strong or concentrated acids, use a PTFE-seated CPVC ball or diaphragm valve instead.
Should I choose a wafer or lug CPVC butterfly valve?
Choose wafer for an economical valve clamped between two flanges in a continuous line. Choose lug when you need dead-end service or end-of-line isolation, so downstream piping can be removed while the upstream stays in operation.
What sizes and operation are available?
Sizes run DN50–DN500 at PN10. DN50–DN200 use a lever with 5° throttling increments; DN250–DN500 use a worm-gear handwheel, also available on smaller sizes.
Can a CPVC butterfly valve be pneumatically actuated?
Yes. For automated isolation on large lines, use our CPVC pneumatic butterfly valve with a corrosion-resistant actuator.