Combined Butterfly-Check Valve
ZECO Valve Group, founded in 1991 with focus on manufacturing china water valve, including control valves, balancing valves, gate valve, butterfly valves, check valves, and air valves. Valve sizing 1/2” to 88”, rating BS 10bar through BS 25bar, served covering buildings & construction, waterworks, fire protection and many other fields. ZECO has excellent product quality and sound managing system.
Basic information of Combined Butterfly-Check Valve
This valve acts as a closed circuit valve and a check valve butterflyto protect the system by avoiding and reducing the backflow of the intermediate fluid in the piping system and causing excessive water hammer.
Features of Combined Butterfly-Check Valve
Valve opens automatically when the pump starts and closes automatically before the pump is stopped;2. In case of power failure at the pumping station, the valve closes like a hydraulic damped check valve;3. Both opening and closing times are adjustable;4. The hydraulic power pack is also equipped with a handpump for emergency opening of the valve.
Principle of Combined Butterfly-Check Valve
This valve is opened by means of a cylinder driven by the hydraulic power pack. The valve is only set to open at a constant speed, and the opening time can be adjusted by adjusting the knob of the valve opening in the hydraulic oil station. Before the 75 ° fast closing, time is 5 ~ 12 seconds (adjustable site); after the 15° slow closing, time is 20 ~ 40 seconds (adjustable site). The realization of closing the valve fast and slow is mainly regulated by controlling the amount of oil drainage through adjusting the two-way oil drainage regulating device. The regulating part is in the part protruding from the upper part of the oil cylinder. If the adjustment is needed, the part protruding from the upper part of the oil cylinder should be removed.
Installation and Commissioning of Combined Butterfly-Check Valve
The pump motor action is controlled by the internal pressure of the accumulator. After the combined butterfly-check valve is put into operation, after a period of time, the oil pressure of the system will decline. When the pressure of hydraulic oil drops to a certain value, it needs to be replenished. Otherwise, the valve will be affected. For specific use, please consult ZECO Valve Group.
Product scope, Standards & Materials of Combined Butterfly-Check Valve
Size Range: 12"~144"Pressure Rating: 10bar ~ 25barFace to Face Dimensions: AMSE B16.10, EN558-1Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2Coating: Fusion Bonded Epoxy Coating Inspection and Test: ISO 5208 / EN 12226-2
在线联系供应商
Other supplier products
 |
Motorized Butterfly Valve | As one of the leadingchina ball valve suppliers, ZECO Valve Group developed our own laboratory for research &development for international stan... |
 |
Single Orifice Air Release Valve | Features of single orifice air release valve Can be a large amount of exhaust, improve water efficiency pump Can be a small amount of exhaust... |
 |
Backflow Preventers | Basic information This bronze adjustable dynamic flow balancingvalve is required to maintain the flow of these pipes or end equipment at all times ... |
 |
Manual Ball Valve | As one of the china ball valve manufacturers, ZECO always adhere to exceed customer expectations,to provide customers with more international stand... |
 |
Gate Valve | The resilient seated water isolation big size gate valve / cast iron gate valve china of ZECO from China is widely used and reliable in the water s... |
Same products
 |
Dry Ash Gate Valve | 卖方: China Valve Industry Co., Ltd. | The dry ash gate valve is designed for both inlet and outlet pipelines. It features... |
 |
China factory High temperature double head bolt 2""-8UN Steam Turbine RSV N for power station | 卖方: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD | "China factory High temperature double head bolt 2""-8UN Steam Turbine RSV N for power stationOur... |
 |
Male Thread Nickel Plated Brass Butterfly Ball Valve | 卖方: Zhejiang Huibo Valve Technology Co., Ltd. | Male Thread Nickel Plated Brass Butterfly Ball Valve Material: Brass Body, Brass Bonnet, brass ba... |
 |
4800030000 For daewoo,evobus,mercedes-benz,paccar foot brake valve | 卖方: Zhuji Oubote Auto Parts Co., Ltd. | 4800030000 foot brake valve are attached to the brake pedal. This isthe valve that actually start... |
 |
Aluminum Gas Valve | 卖方: Dong Guan ABYDA Gas Valve Co., Ltd | Product Specification:1. Raw Material: Al Alloy + solid brass + Mild steel;2. Applicable for LPG,... |
