How it works
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
Butterfly valves are designed for use as shut-off or regulating valves for controlling flows in heat supply systems, water supply systems, in technological processes of food, chemical, oil and gas, pulp and paper and other industries.
The valves are opened and closed by turning the disk by 90°. The triple eccentricity design reduces friction at the disk and seat contact points, which increases the reliability and service life of the gate. In this design, the stem is offset relative to the center axis of the disc and the center axis of the pipeline, and the sealing surfaces are asymmetrically shaped. The combination of the three displacements at the moment of pressing and opening of the sealing surfaces ensures complete absence of friction of the sealing surfaces, contributing to minimization of wear of the seat and seal during the entire service life of the gate.
Technical characteristics of water butterfly valve DNOVA WBV3EX-3431M-1W-F-ISO, body material - carbon steel, disk material - stainless steel AISI 304, seal - metal, stem only:
| Characteristic | Value |
| Nominal diameter DN, mm | 50 - 300 |
| Nominal pressure PN, bar | 25 |
| Working medium temperature t, °C | from -45 to +425 |
| Working medium | Water, air, steam, natural gas and gaseous hydrocarbons, oil, petroleum products, coke oven gas, aggressive media |
| Flow direction | One-way |
| Pipeline connection | Flanged |
| Body material | WCB steel |
| Field of application | Water and heat supply systems, process pipelines |
| Average service life, opening/closing cycles | 30 000 |
| Average service life, years | 10 |
Overall and installation dimensions of water butterfly valve DNOVA WBV3EX-3431M-1W-F-ISO, body material - carbon steel, disk material - stainless steel AISI 304, seal - metal, stem only:
| Model | DN | 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 |
Materials of water butterfly valve DNOVA WBV3EX-3431M-1W-F-ISO, body material - carbon steel, disk material - stainless steel AISI 304, seal - metal, stem only:
| № | Part name | Material |
| 1 | Body | WCB steel |
| 2 | Disc | Stainless steel 316 |
| 3 | Stem | Stainless steel 316 |
| 4 | Seat seal | Metal + graphite |
| 5 | Gland seal | Stainless steel 316 + graphite |
- Body material
- Carbon steel
- Maximum allowable temperature
- 425 °C
- Connection type
- Flanged
- Control type
- Stem only
- 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