Why Close the Discharge Valve Before Starting the Centrifugal Pump?
Reasons for closing the discharge valve
The starting current can be reduced by closing the discharge control valve.
The current will be very high when any motor starts. When the pump is started with an open discharge valve, the discharge head will have greater resistance to the pump. Therefore, the motor must give the pump a larger starting torque, which means that the motor needs to draw more current.
If the discharge valve pump are closed when the pump is started, it means that there is no discharge head and minimum resistance to the pump, and therefore the output current is the smallest. Although the current is greater than the normal value when the motor starts, closing the discharge valve of the centrifugal pump can avoid additional load on the pump.
Situations when the discharge valve can be opened
The nab discharge valves can be opened when there is a check valve. If there is pressure on the discharge side of the centrifugal pump without a check valve when starting, the discharge valve should be closed. With a transparent plastic pipe, leakage can be easily found. It should be used with clear PVC fittings to perform well. It's good to work with clear PVC pipe manufacturer to solve problems together.
Risks of the unclosed discharge valve
Thinking from another aspect, if there are pressures at the discharge end of the pump, it may flow back into the pump before starting. And it will cause backward rotation, which can attract more current and cause damage to the pump. Therefore, it can be prevented by closing the discharge valve of the centrifugal pump when it starts.
If you want to know more about why discharge valve is closed in centrifugal pump, please visit our website.
As a china globe valve manufacturer, we can offer sorts of Globe Valvesfor sale, anything you need, please leave us a message.
Send product request
Other supplier products
Globe Valves | A china manual gate valveis a linear motion valve and is primarily designed to stop, start and regulate flow. The disk of a Globe valve can be tota... | |
Super Austenitic Ball Valves | Duplex stainless steel ball valveexhibit great resistance to chloride pitting and crevice corrosion because of high molybdenum content (>6%) and... | |
Inconel Check Valves | Weidouli offers a comprehensive range of Inconel check valves for all types of applications and industries. As for pressure seal check valves, i... | |
Discharge Valves | The discharge valvesis mainly used for discharging materials at the bottom of the storage tank, reaction kettle, and other vessels. The valve is co... | |
Titanium Ball Valves | Due to their excellent characteristics, titanium ball valveare widely sought after. Especially in the automotive, aviation, shipping and PTA indust... |
Same products
China Full Welded Ball Valve | Seller: Utmost flow control technology Co., Ltd | China Full Welded Ball Valve Since the full welded ball valveseat is composed of a carbonized Te... | |
China Fluorine Lined Butterfly Valve | Seller: Utmost flow control technology Co., Ltd | China Fluorine Lined Butterfly Valve In the well-known butterfly valve technology, fluorine line... | |
China Floating Ball Valve | Seller: Utmost flow control technology Co., Ltd | China Floating Ball Valve UTMOST, a floating ball valve factory, floating ball valve supplier, f... | |
Eccentric Rotary Plug Control Valve | Seller: Utmost flow control technology Co., Ltd | Series C/D China Eccentric Rotary PlugControl Valve UTMOST eccentric rotary disc valvehas the o... | |
China Eccentric Butterfly Valve | Seller: Utmost flow control technology Co., Ltd | China Eccentric Butterfly Valve In contrast with the concentric butterfly valve, a butterfly val... |