In detail
What it is made of
How it works
Multi-turn electric actuator
Rising-stem wedge gate
Construction
Parts and materials
The wedge gate valve is designed for installation on the pipeline as a shut-off device in water supply systems and chemical industry.
Operating principle: The wedge connected to the spindle is lowered or raised depending on the direction of rotation of the hand wheel, closing or opening the passage section of the gate valve body.
The multi-turn actuator is designed for control of industrial shut-off valves, e.g. cast iron and steel gate valves, slide gates, etc.
Application: electric actuator allows to use the valve in automatic control systems of heat and water supply of civil and industrial facilities.
Technical characteristics of wedge gate valves DNOVA GAIR GVWR2121M-2W-F-OST DN50-250 Ru16 flanged, with OST flange, bare stem, for electric drive:
| Characteristic | Meaning |
| Gate valve type | Wedge |
| Diameter | 50-250 mm |
| Nominal pressure | 16 bar |
| Wednesday | water, steam, petroleum products, gaseous media |
| Working environment temperature | from -29 to +425°C |
| Application | water supply, heat supply |
| Connection type | flanged |
| Control type | electric drive |
Electric drives DNOVA MT-N-xEM-O1-380VAC-U1
Technical characteristics of electric drives DNOVA MT-N-xEM-O1-380VAC-U1:
| Characteristic | Meaning |
| Electric drive type | multi-turn |
| Supply voltage | 380 V |
| Ambient temperature | from -28°C to +60°C |
| Maximum drive speed | 50 |
| Degree of protection of the case | IP67 |
| Internal thermal protection response temperature | 110°C |
| ISO Flange Type | F10/F12 |
| Country of origin | China |
Sketch of dimensions of wedge gate valves DNOVA GAIR GVWR2121M-2W-F-OST DN50-250 Ru16 flanged, with OST flange, bare stem, for electric drive
Overall and installation dimensions of wedge gate valves DNOVA GAIR GVWR2121M-2W-F-OST DN50-250 Ru16 flanged, with OST flange, bare stem, for electric drive:
| Diameter | L, mm | D, mm | D1, mm | D2, mm | b, mm | f, mm |
| DN50 | 180 | 160 | 125 | 102 | 17 | 3 |
| DN100 | 230 | 215 | 180 | 158 | 20 | 3 |
| DN250 | 450 | 405 | 355 | 320 | 30 | 3 |
Sketch of dimensions of electric drives DNOVA MT-N-xEM-O1-380VAC-U1
Overall and installation dimensions of electric drives DNOVA MT-N-xEM-O1-380VAC-U1:
| O, mm | 40 |
| A, mm | 149 |
| B, mm | 119 |
| C, mm | 114 |
| D, mm | 200 |
| E, mm | 151 |
| F, mm | 105 |
| G, mm | 117 |
Sketch of materials of wedge gate valves DNOVA GAIR GVWR2121M-2W-F-OST DN50-250 Ru16 flanged, with OST flange, bare stem, for electric drive
Materials of parts of wedge gate valves DNOVA GAIR GVWR2121M-2W-F-OST DN50-250 Ru16 flanged, with OST flange, bare stem, for electric drive:
| No. | Part name | Material |
| 1 | Frame | steel 25L |
| 2 | Wedge | steel 25L |
| 3 | Stock | ASTM A182 F6a steel |
| 4 | Bolt | ASTM A193 B7 steel |
| 5 | screw | ASTM A194 2H steel |
| 6 | Pad | stainless steel+graphite |
| 7 | Lid | steel 25L |
| 8 | Spindle seal | flexible graphite |
| 9 | Pin | ASTM A29 1045 steel |
| 10 | Gland packing | carbon steel |
| 11 | screw | ASTM A194 2H steel |
| 12 | Bolt | ASTM A193 B7 steel |
| 13 | Bracket | steel 25L |
| 14 | Bearing | - |
| 15 | Cuff | - |
| 16 | Stem nut | brass |
| 17 | Casing | ASTM A29 1035 steel |
- Body material
- Steel 20/25L
- Connection type
- Flanged
- Type of seal
- Metal
- Disc material
- Steel 25L
- Limit switches
- Yes
- 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