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Buffer butterfly valve
The sealing pair of the main valve is three eccentric metal seal or double eccentric rubber seal structure, easy to open and close, reliable sealing
Application
Buffer butterfly valve is more advanced pipeline control equipment at home and abroad, mainly installed on the hydraulic turbine, used as a turbine inlet valve, or installing in water conservancy, electric power, water supply and drainage and other kinds of pumping station pumps export, replace the check valve and gate valve function, work, valves and piping host to cooperate, in accordance with the principle of the transient process of water through the default of the opening and closing procedures, effectively eliminate the tube The water hammer can realize the reliable cut-off of the pipeline and protect the safety of the pipeline system.
Characteristic
• It can replace the functions of the original electric gate valve and check valve at the pump outlet, and the mechanical, electrical and hydraulic systems are integrated as a whole, reducing the floor space and infrastructure investment;
• Complete electro-hydraulic control functions, which can be used as an independent system for local debugging and control without additional configuration; Can also be used as a distributed control system (DCS) equipment unit, through the 1/0 channel by the central computer centralized management, and pumps, turbines, bypass valves and other pipeline equipment to achieve linkage operation; And equipped with manual function, no power supply can also be manually opened, closed valve, to meet the special working conditions of valve debugging, control requirements;
• Good controllability, large adjustment range and strong adaptability. The electro-hydraulic control system is equipped with multiple adjustment points, and the opening and closing procedures can be set according to different pipeline control requirements to ensure that when the conditions of opening and closing the valve are met, the valve can and only can be automatically opened and closed according to the preset time and Angle and divided into fast and slow two stages. And can realize no power off valve, effectively eliminate the destructive water hammer, prevent the occurrence of water pump and water turbine unit flying accident, reduce the pipe network system pressure fluctuation, ensure the safe and reliable operation of equipment;
• The sealing pair of the main valve is three eccentric metal seal or double eccentric rubber seal structure, easy to open and close, reliable sealing.
Design Guides
| Design and manufacture | Structure length | Flange connection size | Inspection and test | Pressure and temperature reference |
| NB/T47044、 JB/T 8527 |
GB/T 12221 | GB/T9124.1、JB/T79、 | GB/T13927 | NB/T47044、 GB/T 12224、 |
Product Range
| Nominal pressure | PN2.5～PN40 | |
| Nominal size | DN150～DN2400 | |
| Body matenal | Gray cast iron, ductile cast iron, carbon steel | |
| Test pressure(MPa) | Strength test (Water pressure) | 1.5×P(38℃ pressure rating) |
| Sealing test (Water pressure) | 1.1×Working Pressure | |
| Applicable Temperature | ≤80℃ | |
| Applicable medium | Water, sea water, sediment water, oil, etc | |
Note：
1、The valve beyond the above specifications can be customized according to user requirements;
2、The applicable temperature range of each valve shall be subject to the actual pressure bearing material of the valve.