.

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.



Отправить запрос, связаться с поставщиком

Кому: Weidouli Valves Co.,Ltd
Ваш E-mail:
Текст письма:


Send to other suppliers

Другие товары поставщика

Hastelloy Ball Valves
Hastelloy Ball Valves Hastelloy Ball Valves Hastelloy ball valvescontain ultra-low carbon and high Ni, Mo and Cr elements, which belong to corrosion-resistant and high ...
Check Valves
Check Valves Check valve is a valve referred to the opening and closing parts for the circular disc and by its own weight and medium pressure to block the media...
Stainless Steel Globe Valves
Stainless Steel Globe Valves Cast steel globe valvefeature molybdenum-alloyed construction and offer high resistance to pitting corrosion. Globe valves are named for their sphe...
Duplex Ball Valves
Duplex Ball Valves Duplex ball valveshave the advantages of both ferritic stainless steel and austenitic stainless steel: austenitic stainless steel reduces the britt...
Gate Valves
Gate Valves China industrial gate valves are used to cut off or connect media transmission, and are suitable for pipeline systems in petroleum, chemical, therm...
Все товары поставщика

Похожие товары

Male Thread Nickel Plated Brass Butterfly Ball Valve
Male Thread Nickel Plated Brass Butterfly Ball Valve Продавец: 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
4800030000 For daewoo,evobus,mercedes-benz,paccar foot brake valve Продавец: 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
Aluminum Gas Valve Продавец: Dong Guan ABYDA Gas Valve Co., Ltd Product Specification:1. Raw Material: Al Alloy + solid brass + Mild steel;2. Applicable for LPG,...
Yoyik supply Fan slider S4GA8814 for turbine generator
Yoyik supply Fan slider S4GA8814 for turbine generator Продавец: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD Yoyik supply Fan slider S4GA8814 for turbine generator Is a major production of Dongfang Yoyik. D...
API 6A FC Slab Gate Valve
API 6A FC Slab Gate Valve Продавец: China JSC Valve Manufacturer Group Co., Ltd. FC gate valve adopts a non-rising stem, slab gate, full-size conduit design, floating slab gate a...