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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.
Operating principle: The valves are opened and closed by turning the disk by 90°. Opening is performed by turning the handle counterclockwise, closing - clockwise.
Electric quarter-turn actuators of explosion-proof version are designed for remote and local control of the rotation of the shut-off body by 0° ~ 270° of such types as ball valve, etc. They are widely used in various branches of national economy: in gas, oil, metallurgical, food industry, housing and communal services, etc. Suitable for use in industrial explosion hazardous areas.
|
Characteristic |
Value |
|
Type of valve |
Rotary disc |
|
Diameter |
50-300 mm |
|
Nominal pressure |
16 bar |
|
Working medium temperature |
From -10 to +90°C |
|
Application |
Water supply, heat supply, chemical industry, oil and gas industry, food industry, pulp and paper industry |
|
Type of connection |
Interflanged |
|
Type of control |
Electric actuator |
|
Tightness class |
A |
|
Country of manufacture |
China |
|
Service life |
10 years |
|
Warranty |
12 months |
| Parameter | Value |
| Enclosure protection class | IP67 |
| Control type | ON / OFF |
| Rotation angle, ° | 90±10 |
| Power supply voltage | 220 VAC, 380 VAC, 24 VDC |
| Motor type | Asynchronous motor with squirrel cage rotor |
| Limit switches | 1xOpen/Close, SPDT, 250VAC 10A |
| Auxiliary limit switches | 1xOpen/Close, SPDT, 250VAC 10A |
| Torque switch | 1xOpen/Close, SPDT, 250VAC 10A (except QT-EX-010EM-O2-x-U1) |
| Internal thermal protection | Off at 115°C ±5°C, on at 97°C ±5°C |
| Visual position indicator | Available |
| Manual override | Handwheel |
| Electric actuator position self-locking | Self-locking by worm gear mechanism |
| Mechanical limit stops | Two external adjustable stops |
| Cable entry | M20×1.5 and M36×2 |
| Ambient temperature, °C | from -20 to +70 |
| Lubrication | Aluminum-based (EP type) |
| Explosion-proof standard | ExdIICT4 |
| Enclosure | Aluminum alloy with powder epoxy anti-corrosion coating |
| Max ambient humidity, % | 90 (non-condensing) |
| Average number of open/close cycles | 60 |

| Diameter | A, mm | B, mm | C, mm | PCD, mm | ØD, mm | H, mm | Q° |
| DN50 | 72.5 | 130.5 | 43 | 125 | 19 | 220 | 45 |
| DN65 | 77.5 | 146.5 | 46 | 145 | 19 | 220 | 45 |
| DN80 | 92 | 156 | 46 | 160 | 19 | 220 | 22.5 |
| DN100 | 109 | 168.5 | 52 | 180 | 19 | 260 | 22.5 |
| DN125 | 127 | 190.5 | 56 | 210 | 19 | 260 | 22.5 |
| DN150 | 141 | 213.5 | 56 | 240 | 23 | 260 | 22.5 |
| DN200 | 166 | 246.5 | 60 | 295 | 23 | - | 15 |
| DN250 | 203 | 283 | 68 | 355 | 28 | - | 15 |
| DN300 | 236 | 318 | 78 | 410 | 28 | - | 15 |

| Model | W | K | K1 | A | B | D |
| mm | ||||||
| QT-EX-010EM | 160 | 70 | 230 | Ø90 | Ø70 | Ø50 |
| QT-EX-015EM | 160 | 70 | 230 | Ø90 | Ø70 | Ø50 |
| QT-EX-020EM | 160 | 80 | 250 | Ø120 | Ø102 | Ø70 |
| QT-EX-030EM | 160 | 72 | 298 | Ø150 | Ø102 | Ø70 |
| QT-EX-050EM | 160 | 72 | 298 | Ø150 | Ø102 | Ø70 |
| QT-EX-080EM | 160 | 104 | 296 | Ø180 | Ø125 | Ø102 |
| QT-EX-100EM | 160 | 104 | 296 | Ø180 | Ø125 | Ø102 |
| QT-EX-160EM | 160 | 104 | 296 | Ø210 | Ø165 | Ø125 |
| QT-EX-200EM | 160 | 104 | 296 | Ø210 | Ø165 | Ø125 |
| Model | F | L | L1 | Н | n-C | n-E |
| mm | ||||||
| QT-EX-010EM | Ø16 | 240 | 68 | 270 | 4-M8 | 4-M6 |
| QT-EX-015EM | Ø16 | 240 | 68 | 270 | 4-M8 | 4-M6 |
| QT-EX-020EM | Ø30 | 260 | 75 | 280 | 4-M10 | 4-M8 |
| QT-EX-030EM | Ø30 | 290 | 82 | 320 | 4-M12 | 4-M8 |
| QT-EX-050EM | Ø30 | 290 | 82 | 320 | 4-M12 | 4-M8 |
| QT-EX-080EM | Ø40 | 333 | 82 | 320 | 4-M14 | 4-M12 |
| QT-EX-100EM | Ø40 | 333 | 93 | 350 | 4-M14 | 4-M12 |
| QT-EX-160EM | Ø60 | 333 | 93 | 350 | 4-M16 | 4-M14 |
| QT-EX-200EM | Ø60 | 333 | 93 | 350 | 4-M16 | 4-M14 |

|
№ |
Part name |
Material |
|
1 |
Body |
Stainless steel 304 |
|
2 |
Disc |
Stainless steel 304 |
|
3 |
Seat seal |
NBR |
|
4 |
Stem |
Stainless steel SS 416 |
|
5 |
Handle |
Carbon steel |

Ships within 48 hours · Estimated delivery Jun 22 - Jun 27
US$40
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