Concentric butterfly valve — WAFER type
Wafer type — DN40 to DN800 — PN10/PN16
Concentric wafer-type butterfly valve to EN 558 series 20. GGG40 ductile iron body with full epoxy coating. Vulcanised EPDM liner covering the entire internal surface — no additional flange gasket required. Guaranteed bidirectional sealing. Compact short face-to-face design, ideal for optimised installations.
| Connection | Wafer type |
|---|---|
| Body | GGG40 ductile iron |
| DN | DN40 — DN800 |
| PN | PN10 / PN16 |
| Face-to-face | EN 558 — Series 20 |
| Temperature | −10 °C to +80 °C (std EPDM) |
| Standard | EN 593 / EN 1074-2 |
| Sealing | EN 12266-1 Class A |
- EPDM liner covering the entire internal surface
- Integrated flange gasket — no additional gasket needed
- Bidirectional sealing — install in either direction
- Epoxy coating inside/outside ≥ 250 μm
- AISI 420 shaft fully isolated from the fluid
- Self-lubricating PTFE/bronze bearings — low torque
- ISO 5211 mounting pad — compatible with all actuators
- Field-replaceable liner — simplified maintenance
| Component | Material |
|---|---|
| Body | EN-GJS-400-15 ductile iron (GGG40) — Epoxy coating ≥ 250 μm |
| Disc (butterfly) | GGG40 ductile iron (standard) / AISI 316 optional |
| Shaft | AISI 420 stainless steel (X20Cr13) — Anti-blowout design |
| Liner | Drinking-water grade EPDM — NBR / PTFE / Viton available |
| Bearings | B-62 bronze / self-lubricating PTFE (depending on DN) |
| O-ring | NBR |
| Body coating | Two-component epoxy inside/outside ≥ 250 μm (SA 2.5) |
| Washer / Circlip | Steel (DN 40–200) — B-62 bronze / steel (DN 250–300) |
Pressure: PN10 / PN16 — Face-to-face: EN 558 series 20 — Connection: EN 1092 PN10/16, ANSI-150, BS Table E/D, JIS 5K/10K
| DN | A (mm) | B (mm) | E (mm) | I (mm) | SW (mm) | d3 (mm) | d4 (mm) | ISO 5211 | PN10 weight (kg) |
|---|---|---|---|---|---|---|---|---|---|
| 40 | 181 | 125 | 33 | 22 | 11 | 50 | 6,5 | F05 | 1,60 |
| 50 | 202 | 140 | 43 | 22 | 11 | 50 | 6,5 | F05 | 2,20 |
| 65 | 225 | 156 | 46 | 21 | 11 | 50 | 6,5 | F05 | 3,10 |
| 80 | 253 | 161 | 46 | 21 | 11 | 50 | 6,5 | F05 | 3,40 |
| 100 | 288 | 181 | 52 | 21 | 11 | 50 | 6,5 | F05 | 4,70 |
| 125 | 310 | 195 | 56 | 20 | 14 | 70 | 8,5 | F07 | 7,90 |
| 150 | 340 | 210 | 56 | 22 | 14 | 70 | 8,5 | F07 | 9,20 |
| 200 | 394 | 237 | 60 | 22 | 17 | 70 | 8,5 | F07 | 13,10 |
| 250 | 464 | 262 | 68 | 28 | 22 | 102 | 11 | F10 | 21,50 |
| 300 | 540 | 300 | 78 | 28 | 22 | 125 | 14 | F12 | 32,80 |
| 350 | 620 | 340 | 78 | 27 | 27 | 150 | 125 | F-12 | 47 |
| 400 | 662 | 360 | 102 | 27 | 27 | 150 | 125 | F-12 | 68 |
| 450 | 736 | 390 | 114 | 36 | 36 | 175 | 140 | F-14 | 98 |
| 500 | 790 | 420 | 127 | 36 | 36 | 175 | 140 | F-14 | 130 |
| 600 | 960 | 495 | 154 | 46 | 46 | 210 | 165 | F-16 | 192 |
| 700 | 1110 | 575 | 165 | 90 | 80 | 300 | 254 | F-25 | 312 |
| 800 | 1245 | 620 | 190 | 90 | 80 | 300 | 254 | F-25 | 430 |
E = face-to-face | B = body outside Ø | A = top flange outside Ø | I = shaft bore | SW = shaft square | d3 = top flange bolt circle | d4 = top flange hole Ø | Indicative PN10 weight, bare shaft without actuator.
Epoxy coating — body
250 μm — Two-component epoxy paint applied by electrostatic powder coating after SA 2.5 blasting. Minimum thickness 250 μm inside and outside.
Disc — protection
≥ 200 μm — GGG40 ductile iron with epoxy coating, or AISI 316 stainless steel disc as an option depending on the application.
Shaft — AISI 420 stainless
AISI 420 — Martensitic stainless steel shaft providing optimal resistance to corrosion and mechanical wear over time.
Bolting
A2-70 / A4-80 stainless — Zinc-plated dichromated steel as standard. Available in A2-70 / A4-80 stainless steel for aggressive environments.
Reference standards: the epoxy coating complies with EN 14901 (internal coatings of valves for drinking water) and GSK. Surface preparation is carried out by blasting to ISO 8501-1 grade SA 2.5 before coating.
