news - China Donjoy Technology

July 30, 2022

Question 1: What is lobe pump ? Answer ： Lobe pump(rotor pump) refers to a pump that changes the working volume through the relative movement between the rotor and the pump body, thereby increasing the energy of the liquid. The rotary lobe pump is a rotary positive displacement pump with positive displacement properties and its flow does not change with back pressure changes.

What is a pneumatic control valve?

April 27, 2022

With the development of human social productive forces, the development of regulating valves has gone through a long period of time.

Which type of valve does the diaphragm valve belong to? How to choose correctly?

April 20, 2022

Diaphragm valve is a clamping valve, which is mainly used for opening and closing on the pipeline.

What are the characteristics of the diaphragm valve?

April 13, 2022

The most prominent feature is that the diaphragm valve separates the inner cavity of the lower valve body from the inner cavity of the upper bonnet, so that the valve stem, valve disc and other parts above the diaphragm are not corroded by the medium, eliminating the need for packing and sealing structure, and will not produce medium outside. leak.

Three-way globe valve structure principle

April 11, 2022

The body material of the three-way globe valve is divided into cast steel or stainless steel, which is suitable for occasions under various working conditions;

Do you have to choose between angle valve and ball valve in toilet or do you have to have both?

March 28, 2022

Ball valves are generally used as the main valve for household water intake. The ball valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline.

Ball valve installation and use

March 17, 2022

Preparation before ball valve installation:1) The front and rear pipes should be coaxial, and the sealing surfaces of the two flanges should be parallel. The pipeline should be able to bear the weight of the ball valve, otherwise there must be proper supports on the pipeline.

Introduction of three-way globe valve

March 11, 2022

The body material of the three-way globe valve is divided into cast steel or stainless steel, which is suitable for occasions under various working conditions;

Basic performance of safety valve and terms of safety valve

March 03, 2022

Safety valves are used on pressurized equipment, containers or pipelines as overpressure protection devices.

Manual Split control valve

March 03, 2022

Split manual control valve on hot sale

In which fields are pneumatic ball valves mainly used and what are the main features?

February 19, 2022

Now ball valves are widely used in all walks of life, which is of great significance and value to support the normal development of the national economy. So what fields are pneumatic ball valves mainly used in?

Structural principle of valve positioner

January 14, 2022

The valve positioner is one of the key accessories of the pneumatic control valve. Its function is to turn the electrical signal output by the control device into the gas signal that drives the action of the control valve.