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
Rotary disc gate valve is designed for use as shut-off or regulating valves for flow control 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 disc by 90°. The triple eccentricity design reduces friction at the disc and seat contact points, which increases the reliability and service life of the gate. In this design, the stem is offset relative to the centre axis of the disc and the centre 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 that the sealing surfaces are completely frictionless, helping to minimise seat and seal wear throughout the life of the gate.
The DNOVA HGBF gearbox allows the required positioning of the shut-off valve to be manually set by a quarter turn, acting as an alternative to pneumatic, electric or hydraulic quarter-turn actuators. It is suitable for ball valves, butterfly valves, 90° butterfly valves and for controlling air dampers.
Technical characteristics of butterfly valves with triple eccentricity DNOVA WBV3EX-3432M-1W-F-ISO DN50-150 Ru25:
| Characteristic | Meaning |
| Shutter type | rotary disc |
| Diameter | 50-150 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 |
Gearboxes DNOVA HGBF
Technical data for gear units DNOVA HGBF:
| Characteristic | Meaning |
| Electric drive type | quarter turn |
| Ambient temperature | 30 to +120 °C |
| Application | water supply, heat supply, process pipelines |
| Connection type | ISO 5211 |
Sketch of dimensions of butterfly valves with triple eccentricity DNOVA WBV3EX-3432M-1W-F-ISO DN50-150 Ru25
Overall and installation dimensions of butterfly valves with triple eccentricity DNOVA WBV3EX-3432M-1W-F-ISO Du50-150 Ru25:
| 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 |
Dimension sketch of DNOVA HGBF gearboxes
Dimensions and mounting dimensions of gear units DNOVA HGBF:
| Model | A, mm | B, mm | C, mm | D, mm | E, mm | F, mm | H, mm | d1, mm | D2, mm | D3, mm |
| HGB-1 | 165 | 127 | 84 | 66 | 12 | 47 | 73 | 35 | 81 | 50/70 |
| HGB-2 | 185 | 142 | 102 | 79 | 12 | 52 | 78 | 42 | 92 | 70(89) |
| HGB-3 | 250 | 190 | 140 | 112 | 16 | 68 | 108 | 55 | 125 | 70/102/125 |
| HGB-4 | 300 | 220 | 164 | 120 | 20 | 71 | 111 | 70 | 140 | 102/140(125) |
Material sketch of butterfly valves with triple eccentricity DNOVA WBV3EX-3432M-1W-F-ISO DN50-150 Ru25
Materials of parts of butterfly valves with triple eccentricity DNOVA WBV3EX-3432M-1W-F-ISO Du50-150 Ru25:
| 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 |
Sketch of gearboxes DNOVA HGBF
Gear unit design DNOVA HGBF:
| No. | Name | Material |
| 1 | Transparent indicator cover | PC Plycarton resin |
| 2 | Screw | steel 304 |
| 3 | Screw | steel 304 |
| 4 | Lid | aluminum ADC 12 |
| 5 | Worm gear reducer | cast iron QT450 |
| 6 | Adjusting screw | steel 304 |
| 7 | Rack | steel 45 |
| 8 | Case | butadiene-acrylonityl rubber |
| 9 | Sleeve | PZ2175 based on ketones |
| 10 | Bearing | alloy steel |
| 11 | Frame | aluminium alloy ADC 12 |
| 12 | Bearing | alloy steel |
| 13 | Seal | rubber |
| 14 | Washer | steel 304 |
| 15 | Screw | steel 304 |
| 16 | Axis | steel 45 |
| 17 | Limit switch | - |
| 18 | Sealing ring | butadiene-acrylonityl rubber |
- 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 316
- 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