How it works
Manual quarter-turn gearbox
Butterfly disc
The number that matters
Nominal pressure
25bar
The pressure class of the valve body at 20 °C. Working limits depend on the medium and its temperature.
Construction
Parts and materials
Applications
Media and industries
- Water
- Air
- Steam
- Oil
- Oil Products
- Corrosive Media
- Natural Gas
- Gaseous Media
The butterfly valve is designed to be used as a shut-off or control valve to control flows in heat supply systems, water supply, in technological processes in the food, chemical, oil and gas, pulp and paper and other industries. The valves are opened and closed by rotating the disk by 90°. The triple eccentricity design reduces friction at the contact points of the disk and seat, which increases the reliability and service life of this valve. With this design, the stem is offset relative to the central axis of the disk and the central axis of the pipeline, and the sealing surfaces have an asymmetric shape. The combination of three offsets at the moment of pressing and opening the sealing surfaces ensures a complete absence of friction of the sealing surfaces, helping to minimize wear of the seat and seal throughout the service life of the valve.
The DNOVA gearbox allows you to manually set the required positioning of the shut-off element by a quarter of a turn, acting as an alternative to pneumatic, electric or hydraulic quarter-turn actuators.
Technical characteristics of triple eccentricity butterfly valves DNOVA WBV3EX-3431M-1W-F-ISO DN50-125 PN25:
| Characteristic | Meaning |
| Shutter type | rotary disc |
| Diameter | 50-125 mm |
| Nominal pressure | 25 bar |
| Working environment temperature | from -45 to +425°C |
| Application | water supply, heat supply, process pipelines |
| Connection type | flanged |
| Control type | Manual (handle, gearbox) |
| Sealing class | A |
| Service life | 10 years |
| Guarantee | 12 months |
Reducers DNOVA RDN
Technical characteristics of DNOVA RDN gearboxes:
| Characteristic | Meaning |
| Electric drive type | quarter turn |
| Ambient temperature | from -40 to +120 °C |
| Application | water supply, heat supply, process pipelines |
| Connection type | ISO 5211 |
Sketch of dimensions of triple eccentricity butterfly valves DNOVA WBV3EX-3431M-1W-F-ISO DN50-125 PN25
Overall and installation dimensions of triple eccentricity butterfly valves DNOVA WBV3EX-3431M-1W-F-ISO DN50-125 PN25:
| Model | D.N. | L | D | D1 | D2 | n–Ød | b | H1 | H2 |
| mm | |||||||||
| DN50 | 50 | 108 | 160 | 125 | 99 | 4–Ø18 | 20 | 102 | 78 |
| DN65 | 65 | 112 | 180 | 145 | 118 | 8–Ø18 | 22 | 112 | 72 |
| DN80 | 80 | 114 | 195 | 160 | 132 | 8–Ø18 | 24 | 122 | 78 |
| DN100 | 100 | 127 | 230 | 190 | 156 | 8–Ø22 | 24 | 155 | 78 |
| DN125 | 125 | 140 | 270 | 220 | 184 | 8–Ø26 | 26 | 157 | 95 |
| DN150 | 150 | 140 | 300 | 250 | 211 | 8–Ø26 | 28 | 170 | 95 |
| DN200 | 200 | 152 | 360 | 310 | 274 | 12–Ø26 | 30 | 200 | 102 |
| DN250 | 250 | 165 | 425 | 370 | 330 | 12–Ø30 | 32 | 247 | 108 |
| DN300 | 300 | 178 | 485 | 430 | 389 | 16–Ø30 | 34 | 274 | 110 |
Sketch of the dimensions of the gearboxes DNOVA RDN
Overall and installation dimensions of DNOVA RDN gearboxes:
| Model | A, mm | B, mm | ØC, mm | D, mm | J, mm | G, mm | T, mm | ØF, mm | 4M, mm | HxH, mm |
| RDN-1 | 170 | 130 | 160 | 100 | 45 | 120 | 50 | 50 | 4-M8 | 9x9 |
| RDN-2 | 170 | 130 | 160 | 100 | 45 | 120 | 50 | 50 | 4-M8 | 11x11 |
| RDN-3 | 170 | 130 | 160 | 100 | 45 | 120 | 50 | 50 | 4-M8 | 14x14 |
| RDN-4 | 240 | 160 | 260 | 130 | 55 | 150 | 70 | 100 | 4-M10 | 17x17 |
| RDN-5 | 240 | 160 | 260 | 130 | 55 | 150 | 70 | 100 | 4-M12 | 22x22 |
Sketch of materials of butterfly valves with triple eccentricity DNOVA WBV3EX-3431M-1W-F-ISO DN50-125 PN25
Materials of parts of triple eccentricity butterfly valves DNOVA WBV3EX-3431M-1W-F-ISO DN50-125 PN25:
| No. | Part name | Material |
| 1 | Frame | WCB steel |
| 2 | Disk | Stainless steel 316 |
| 3 | Stock | Stainless steel 316 |
| 4 | Saddle seal | metal (surfacing D507) + graphite |
| 5 | Gland seal | Stainless steel 316 + graphite |
- Body material
- Carbon steel
- Maximum allowable temperature
- 425 °C
- Connection type
- Flanged
- Control type
- Gearbox
- Operating environment
- Water, Air, Steam, Oil, Oil Products, Corrosive Media, Natural Gas, and Gaseous Media
- Applications
- Water Supply, Heat Supply, and Process Pipelines
- Nominal pressure
- 25 bar
- Type of seal
- Metal
- Disc material
- Stainless steel AISI 304
- Country of origin
- China
Production. Usually 7–14 business days after you approve the quotation and pay. Made-to-specification items are confirmed in the quotation.
Freight. Not charged at checkout. A manager quotes air and sea freight to your port or airport, and nothing ships until you approve the price and the freight.
To North America. From approval and payment to the destination port or airport: air 14–24 days, sea 32–60 days. Estimates, not guarantees.
Terms. EXW Ningbo or FOB Ningbo Port; CIF on request. The agreed term is written on the Proforma Invoice.
Total items
Product subtotal