PVDF Manual Ball Valve
PVDF ball valves (manual) give you quarter-turn on/off control of the most aggressive media — concentrated acids, halogens, and ultrapure fluids — in a compact, hand-operated valve that needs no power or air. We build ours from 100% virgin PVDF with a PTFE seat, in true union and flanged configurations for chemical, semiconductor, and process service.
A ball valve gives a full-bore, low-pressure-drop flow path and a fast quarter-turn action, while the PTFE seat handles frequent cycling without developing leaks. As a manual valve it is simple and reliable, with no actuator, solenoid, or air supply to fail.
PVDF chemical compatibility
PVDF resists a wide range of high-concentration acids, halogens, and oxidizers — ◎ excellent, ○ limited, × not recommended.
| Media | Rating |
|---|---|
| Sulfuric acid 98% | ◎ 20–80 °C (○ at 100 °C) |
| Hydrofluoric acid 40–55% | ◎ 20–100 °C |
| Hydrochloric acid 35% | ◎ 20–120 °C |
| Chlorine gas (wet / dry) | ◎ 20–120 °C |
| Hydrogen peroxide 35–50% | ◎ 20–100 °C |
PVDF is not suited to some strong polar solvents, esters, ketones, and certain amines — acetone, butyl acetate, THF, and aniline are limited at 20 °C and not recommended at 40 °C and above. See our PVDF chemical resistance guide.
True union or flanged?
The true union version (DN15–DN100) screws apart at both ends, so you can lift the valve straight out for cleaning or seat replacement without cutting pipe. It is compact and light, which makes it the natural choice inside semiconductor wet tools and high-purity dosing cabinets where space is tight and maintenance is frequent.
The flanged version (DN15–DN200) bolts to the pipe through integral flanges, giving far greater strength against pipe stress, vibration, and thermal movement. It is the standard choice on larger-bore facility hook-up lines — ultrapure-water ring mains and waste-acid headers — at the cost of more weight and a more involved removal.
Manual or pneumatic?
Choose the manual valve for sampling ports, system backup valves, and low-frequency duties where an operator is on hand. For automated cleanroom cleaning lines or central acid/alkali dosing — where remote control and fail-safe operation protect people and product — use our PVDF pneumatic ball valve instead.
Why our PVDF manual ball valves
- PTFE seat for leak-free service through frequent cycling.
- 100% virgin PVDF, with imported Arkema Kynar® or Solvay Solef® grades available — high purity, no embrittlement, effectively zero leaching.
- No-glue chemical joining by socket fusion or IR butt welding, eliminating bonded-joint leak paths.
- 304 or 316 stainless steel stem option for corrosion resistance.
- Lightweight — the valve and plastic handle add almost no weight, so the pipe usually needs no extra support bracket.
- Low cost, minimal maintenance, water-hammer-friendly — the slow manual close avoids the pressure surges that fast valves cause in plastic lines.
Configurations
- True union: DN15–DN100 (1/2″–4″); socket or threaded ends.
- Flanged: DN15–DN200 (1/2″–8″); ANSI, DIN, or JIS flanges.
Specifications
| Body material | PVDF (100% virgin; Arkema Kynar® / Solvay Solef® option) |
| Size range | True union DN15–DN100; flanged DN15–DN200 |
| Pressure rating | PN10 (derates with temperature) |
| Max temperature | ~120 °C |
| Seat | PTFE |
| O-ring | EPDM or FKM |
| Connection | True union (socket / threaded) or flanged (ANSI / DIN / JIS) |
| Operation | Manual lever |
| Stem | PVDF |
Dimensions — DIN (Series 2) 尺寸表 DIN（系列二）
| Size (DIN) | d | d1 | d2 | D | D1 | L | I | L1 | L2 | W | H1 | H2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ (DN15) | 15 | 19.20 | 19.00 | 56.00 | 32.00 | 112.00 | 23.00 | 66.00 | 57.00 | 85.00 | 51.80 | 28.00 |
| 3/4″ (DN20) | 20 | 24.20 | 23.90 | 65.00 | 37.00 | 120.00 | 26.00 | 68.00 | 59.00 | 90.00 | 61.00 | 32.50 |
| 1″ (DN25) | 25 | 31.10 | 30.90 | 76.00 | 45.50 | 136.00 | 29.00 | 76.00 | 68.00 | 106.00 | 69.30 | 38.00 |
| 1-1/4″ (DN32) | 32 | 39.00 | 38.80 | 87.00 | 55.50 | 150.50 | 32.50 | 85.00 | 76.00 | 116.00 | 80.80 | 43.50 |
| 1-1/2″ (DN40) | 40 | 48.90 | 48.70 | 101.00 | 62.00 | 168.00 | 35.50 | 95.50 | 86.50 | 128.00 | 92.00 | 50.50 |
| 2″ (DN50) | 50 | 61.90 | 61.60 | 121.00 | 79.00 | 180.00 | 38.50 | 103.00 | 92.00 | 155.00 | 108.00 | 60.60 |
| 2-1/2″ (DN63) | 63 | 73.70 | 73.40 | 150.00 | 94.20 | 235.00 | 44.50 | 146.00 | 134.00 | 195.00 | 135.00 | 75.00 |
| 3″ (DN80) | 75 | 88.60 | 88.20 | 169.50 | 113.00 | 265.00 | 51.00 | 163.00 | 148.00 | 215.00 | 150.50 | 85.00 |
| 4″ (DN100) | 90 | 108.40 | 108.00 | 190.00 | 135.00 | 304.00 | 61.50 | 181.00 | 157.00 | 255.00 | 166.00 | 95.00 |
d = size reference; d1 / d2 = solvent-weld socket diameters at two depths (DIN standard). L = face-to-face length; D, D1, I, L1, L2, W, H1, H2 are reference dimensions — see the dimension drawing.
| No. | Parts | Materials |
|---|---|---|
| 1 | Body | PVDF |
| 2 | Ballseal | PTFE |
| 3 | Ball | PVDF |
| 4 | Inner plug | PVDF |
| 5 | Stem seal | PTFE |
| 6 | Locator | PVDF |
| 7 | Compression nut | PVDF |
| 8 | Stem | PVDF |
| 9 | Handle | ABS |
| DN | D1 (mm) |
D (mm) | L (mm) | h (mm) | n | Φ (mm) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DIN | JIS | ANSI | HG/DIN | JIS | ANSI | HG/DIN | JIS | ANSI | ||||
| 15 | 95 | 65 | 70 | 60 | 100 | 15 | 4 | 4 | 4 | 14 | 15 | 16 |
| 20 | 105 | 75 | 75 | 70 | 120 | 17 | 4 | 4 | 4 | 14 | 15 | 16 |
| 25 | 115 | 85 | 90 | 79 | 140 | 17 | 4 | 4 | 4 | 14 | 15 | 16 |
| 32 | 135 | 100 | 100 | 89 | 160 | 18 | 4 | 4 | 4 | 18 | 19 | 16 |
| 40 | 145 | 110 | 105 | 98 | 165 | 18 | 4 | 4 | 4 | 18 | 19 | 16 |
| 50 | 160 | 125 | 120 | 121 | 180 | 20 | 4 | 4 | 4 | 18 | 19 | 19 |
| 65 | 180 | 145 | 140 | 140 | 220 | 22 | 4 | 4 | 4 | 18 | 19 | 19 |
| 80 | 195 | 160 | 150 | 152 | 250 | 25 | 8 | 8 | 4* | 18 | 19 | 19 |
| 100 | 215 | 180 | 175 | 190 | 280 | 25 | 8 | 8 | 8 | 18 | 19 | 19 |
| 125 | 245 | 210 | 210 | 216 | 325 | 28 | 8 | 8 | 8 | 18 | 19 | 22 |
| 150 | 280 | 240 | 240 | 241 | 365 | 30 | 8 | 8 | 8 | 22 | 23 | 22 |
| 200 | 335 | 295 | 290 | 298 | 405 | 35 | 8 | 12* | 8 | 22 | 23 | 22 |
| 250 | 400 | 350 | 355 | 362 | 500 | 38 | 12 | 12 | 12 | 22 | 25 | 26 |
| 300 | 455 | 400 | 400 | 432 | 600 | 40 | 12 | 16* | 12 | 22 | 25 | 26 |
Typical applications
PVDF manual ball valves suit high-purity and aggressive-chemical service: sampling and backup valves in semiconductor and ultrapure-water (UPW) systems, manual isolation on mixed-acid lines, and shut-off in scrubber and chlor-alkali service. To weigh PVDF against the other thermoplastics, see our plastic valve material selection guide.
Why buy PVDF ball valves from Huiya
Our PVDF ball valves are built for aggressive acids, halogens, and high-purity media, 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
Or explore our full range of PVDF valves.
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 PVDF ball valve used for?
PVDF ball valves provide manual on/off isolation of highly corrosive and high-purity media — concentrated acids, hydrofluoric acid, halogens, and ultrapure water — in semiconductor, chemical, and scrubber service.
Is a PVDF ball valve compatible with sulfuric acid and hydrofluoric acid?
Yes. PVDF handles 98% sulfuric acid (excellent to ~80 °C) and 40–55% hydrofluoric acid (excellent to ~100 °C), along with 35% hydrochloric acid, wet or dry chlorine, and 35–50% hydrogen peroxide. It is not recommended for ketones, esters, or some amines such as acetone and THF, especially above 40 °C.
Should I choose a true union or flanged PVDF ball valve?
Choose true union (DN15–DN100) for compact, easily serviced installations such as wet tools and dosing cabinets. Choose flanged (DN15–DN200) for larger-bore facility lines that need higher strength and pressure capability.
When should I use a manual rather than a pneumatic PVDF ball valve?
Use the manual valve for sampling points, backup valves, and low-frequency operation. Use a pneumatic valve for automated or safety-critical duties that need remote control and fail-safe operation.
What sizes, temperature, and minimum order apply?
True union runs DN15–DN100 and flanged DN15–DN200, rated PN10 and to about 120 °C, with a minimum order of 20 pieces and OEM/custom options. Send us your media and conditions for a quotation.