How it works
Multi-turn electric actuator
Rising-stem wedge gate
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
- Steam
- Oil Products
- Gaseous Media
- Water Supply
The wedge gate valve is designed for installation on a pipeline as a shut-off device in water supply systems and the chemical industry.
The wedge, connected to the spindle, is lowered or raised depending on the direction of rotation of the handwheel, closing or opening the flow section of the valve body.
The multi-turn electric drive DNOVA MT-N-xEM-O2-x-U1 five-cam is designed to automate the process of controlling industrial valves, as well as to determine the position of the shut-off element of the valve. The operating principle of the electric drive is to convert the electrical signal coming from the control device into rotational movement of the output shaft.
The electric drive consists of six main units:
- electric motor;
- a gearbox that transmits force from the electric motor to the output shaft;
- torque, stroke and adjustment control mechanism;
- mechanism for switching from electric to manual control (to switch from electric to manual control, you need to pull the switching lever);
- flywheel, used to open and close the valve when switching to manual control;
- electrical part.
Main technical characteristics of wedge gate valves 30s964nzh DNOVA GVWR3434M-2W-F-OST flanged GAIR, body - carbon steel WCB, seal - metal, with OST flange and round stem, control - electric actuator DNOVA MT-N-EM-O2-380- U1 five-cam
|
Perimeter |
Meaning |
|
Nominal diameter DN, mm |
300 |
|
Working pressure PN, bar |
25 |
|
Temperature of working environment t, °C |
From -40 to +425 |
|
Working environment |
Water, steam, petroleum products and other liquid or gaseous media that are neutral to the materials used |
|
Direction of flow |
Double sided |
|
Control type |
Bare stem |
|
Connection type |
Flanged |
|
Body material |
Carbon steel WCB |
|
Material of the shut-off element (wedge) |
Carbon steel WCB |
|
Application areas |
Heating and water supply systems; industrial pipelines |
|
Service life, years |
10 |
Sketch of dimensions of wedge gate valves 30s964nzh DNOVA GVWR3434M-2W-F-OST flanged GAIR, body - carbon steel WCB, seal - metal, with OST flange and round stem, control - electric actuator DNOVA MT-N-EM-O2-380- U1 five-cam
Overall and installation dimensions of wedge gate valves 30s964nzh DNOVA GVWR3434M-2W-F-OST flanged GAIR, body - carbon steel WCB, seal - metal, with OST flange and round stem, control - electric actuator DNOVA MT-N-EM-O2-380- U1 five-cam
| D.N. | 300 |
| L, mm | 500 |
| D, mm | 485 |
| D1, mm | 430 |
| D2, mm | 390 |
| b, mm | 40 |
| f, mm | 4 |
| z–d, mm | 16-30 |
| L1, mm | 564 |
Landing dimensions of wedge gate valves 30s964nzh DNOVA GVWR3434M-2W-F-OST flanged GAIR, body - carbon steel WCB, seal - metal, with OST flange and round stem, control - electric actuator DNOVA MT-N-EM-O2-380- U1 five-cam
| D.N. | Type | n , mm | HxH , mm | D , mm | D1 , mm | d , mm | d1 , mm | h , mm | h1 , mm | c, mm |
| 300 | IN | 22 | 200x200 | 155 | 220 | 70 | 84 | 20 | 10 | 6.5 |
Sketch of materials of wedge gate valves 30s964nzh DNOVA GVWR3434M-2W-F-OST flanged GAIR, body - carbon steel WCB, seal - metal, with OST flange and round stem, control - electric actuator DNOVA MT-N-EM-O2-380- U1 five-cam
Table of parts and materials of wedge gate valves 30s964nzh DNOVA GVWR3434M-2W-F-OST flanged GAIR, body - carbon steel WCB, seal - metal, with OST flange and round stem, control - electric actuator DNOVA MT-N-EM-O2-380- U1 five-cam
|
Item No. |
Part name |
Material |
|
1 |
Frame |
steel WCB+13Cr |
|
2 |
Wedge |
steel WCB+13Cr |
|
3 |
Stock |
steel 2Cr13 |
|
4 |
Bolt |
steel 45 |
|
5 |
screw |
steel 35 |
|
6 |
Pad |
stainless steel+graphite |
|
7 |
Lid |
WCB steel |
|
8 |
Spindle seal |
flexible graphite |
|
9 |
Pin |
carbon steel |
|
10 |
Gland packing |
carbon steel |
|
11 |
screw |
steel 45 |
|
12 |
Bolt |
steel 35 |
|
13 |
Bracket |
WCB steel |
|
14 |
Bearing |
- |
|
15 |
Cuff |
- |
|
16 |
Stem nut |
brass |
|
17 |
Casing |
ASTM A29 1035 steel |
Image of electric drive
Main parameters of electric drives DNOVA MT-N-EM-O2-380-U1:
| Name | Meaning |
| Supply voltage | 380 V |
| Ambient temperature, °C | from -30 to +70 |
| Electric drive type | multi-turn |
| Engine type | asynchronous |
| Output shaft speed, rpm | 18/24 |
| Manual transmission ratio | 1:01 |
| Cable entry | waterproof G1/2 |
| Housing protection class, IP | 67 |
| Automatic shut-off in the open, closed and jammed positions | There is |
| Winding insulation type | F |
| Ambient humidity, % | ≤95 (at 25°C) |
| Explosion protection of the housing | No |
Electric drive sketch
Dimensions and installation sizes of the electric drive DNOVA MT-N-EM-O2-380-U1:
| Model | MT-N-010EM-O2-380-U1 |
| W, mm | 334 |
| H, mm | 258 |
| L, mm | 411 |
| DxD, mm | 100x100 |
| D1, mm | 104 |
| D2, mm | 70 |
| d1, mm | 32 |
| D2, mm | 44 |
| f, mm | 8 |
| H, mm | 5 |
| h1, mm | 3 |
| h2, mm | 18 |
Sketch
Scheme of the device of multi-turn electric drives DNOVA:
| Item No. | Name |
| 1 | Electric motor |
| 2 | Geared motor |
| 3 | Worm gear reducer |
| 4 | Worm |
| 5 | Lever |
| 6 | Torque mechanism |
| 7 | Set of disc springs |
| 8 | Opening indicator |
| 9 | Movement mechanism |
| 10 | Output shaft |
| 11 | Worm gear reducer |
| 12 | Bevel gear |
- Body material
- Carbon steel
- Maximum allowable temperature
- 425 °C
- Connection type
- Flanged
- Operating environment
- Water, Steam, Oil Products, and Gaseous Media
- Applications
- Water Supply
- Nominal pressure
- 25 bar
- 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.