Description
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, ⁰C | 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 |
Specifications
Delivery
The cost and delivery time for your order depend on several factors, including the specific product you are ordering, the quantity, and the country of destination. Each product may have different manufacturing lead times and shipping requirements, which can affect the overall delivery schedule.
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