Backflow Preventers
Basic informationThis sustainingvalveis opened to prevent the pipeline and equipment from being damaged due to overpressure when the pressure in the water supply pipeline exceeds the set pressure of pressure relief. The valve closes automatically when pressure drops to the set value.Features1. Accurate Pressure Control2. Fast Opening to Maintain Line Pressure3. Slow Closing to Prevents Surges4. Completely Automatic OperationPrincipleInlet pressure water enters the lower cavity of the pilot valve diaphragm from the guide valve when the pressure in the pipeline exceeds the set pressure of the guide valve to make its pressure increase to open the guide valve, the main valve control room outwards drain under the effect of the inlet pressure water to open the main valve, it starts to discharge pressure. When the pressure in the pipeline drops to the set pressure, the pressure in the lower cavity of the guide valve diaphragm decreases, causing the guide valve closed. This results in increased water pressure from the guide pipe to the pilot valve, then to the main valve control room. The main valve plate closes and begins to hold pressure.Installation and CommissioningThe pressure relief(sustaining) valve supports horizontal and vertical installation but should pay attention to the inlet and outlet direction of valve body water when installing. In general, one fire water supply system can only install one pressure relief valve. Within the operating pressure range of the spring specified in the nameplate, the opening pressure can be adjusted by rotating the adjusting screw to change the spring compression amount. For specific use, please consult ZECO Valve Group.Product Scope, Standards & MaterialsSize Range: 2"~24"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 CoatingInspection and Test: ISO 5208 / EN 12226-2
ZECOis one of the most professional control valve manufacturers china, and we have been devoted to produce valve chinafor many years. If you want to know more details or want a quotation, just feel free to contact us!
在线联系供应商
Other supplier products
 |
Chemical | INDIA JSW DOLVI 1 Million Tons Coke Oven Project ZECO VALVE provided lug butterfly valves, cast steel gate valves and motorized ball chemical valve... |
 |
Cast Steel Gate Valve | Categories: Gate Valve, Gate Valve By Material Tags: Isolation Valve, OS&Y Valve Description of Cast Steel Gate Valve: ZECO cast steel gat... |
 |
Swing Check Valve | What is a Swing Check Valve? A Swing Check Valve is desinged to prevent the medium in the pipeline from flowing back. As pressure reaches zero, th... |
 |
12 Inch Butterfly Valve | Description of 12 Inch Butterfly Valve: Most of ZECO 12 butterfly valveoperated by hand-wheel, wrench and handles, pay attention to the operation s... |
 |
Strainer & Dirt Separator | Strainers, dirt separators and backflow preventers are designed to prevent impurities from entering the specified pipe section. Comparing these thr... |
