1. The bolt welded on the valve disc should not be too long, otherwise it will be due to the […]

Test method: 1) Check the sealing operation mode of the butterfly valve to confirm whether the sealing is closed by […]

Terms and definitions: (1)  Static pressure life test. Under laboratory conditions, the valve under the action of medium pressure, from […]

1. Weld the flange to the pipe and cool it to the ambient temperature before installing the valve on the […]

Normally for the technology process of the valve seat for soft seated type butterfly valves, it can be classified into […]

Inflatable butterfly valve Basic information: Body: ASTM A536 65-45-12, WCB, CF8M Disc: ASTM A536 65-45-12 Nylon coated, CF8, CF8M, 2507, […]

First, Because the multi-layer soft and hard overlapping sealing ring is fixed on the valve plate. When the valve plate […]

First, the characteristics of metal hard seal butterfly valve: 1, metal hard seal butterfly valve with three eccentric sealing structure, […]

Electric butterfly valve belongs to a variety of electric regulating valve and electric valve, widely used in environmental protection, pharmaceutical, […]

Pneumatic butterfly valve is a relatively large use of industrial pipeline in the important execution unit, through the compressed air […]

Butterfly valve installation direction: 1. The butterfly valve disc is installed in the diameter direction of the pipeline. 2. When […]

Metal seal butterfly valve: Adopt metal sealing surface and other rigid materials to achieve zero leakage requirements, which can be […]

Processing technology: From the three eccentric metal hard seal butterfly valve structure characteristics analysis. Butterfly plate assembly sealing ring for […]

Hard seal butterfly valve adopts a structure that the butterfly plate can move along the axial diameter of the valve. […]

Butterfly valve is mainly composed of valve body, butterfly plate, stem, sealing ring and transmission device. (1) Valve body The […]

Butterfly valve common faults and elimination methods 1. Before installation, please confirm whether the product performance and medium flow direction […]

1. Valves test: 1.1 Material test: 1) The material will tested according to the standard by the inspection of the […]

The action of pneumatic actuator control valve is unstable: 1. Unstable air source pressure. 1) Compressor capacity is too small; […]

Pneumatic control valve does not operate: 1. No signal, no air source. 1) The air source is not open; 2) […]

Electric actuators are mainly use in power plants or nuclear power plants. Because a smooth, stable and slow process is […]

Pneumatic actuators are a kind of classification in actuators. From the perspective of technical performance, the advantages of pneumatic actuators […]

1. Fix the pneumatic actuator on the test table and connect the air source, control air source and displacement detection […]

Pneumatic actuators also known as pneumatic head pneumatic head, is driven by air pressure to open and close or adjust […]

The use of AT pneumatic actuators sometimes shows a slow reaction, which undoubtedly greatly affects the working efficiency of AT […]

Pneumatic actuators are driven by air pressure to open and close or adjust the valve actuators, commonly known as pneumatic […]

Valve positioner is the main accessory of pneumatic actuator control valve. It takes stem displacement signal as input feedback measurement […]

Actuators have pneumatic and electric two forms, usually we understand more about pneumatic actuators. But pneumatic actuators from the technical […]

Pneumatic valves in regulating valve are characteristic of the valve. Because of the pneumatic valve is connect to the pneumatic […]

The more and more widely used pneumatic valve is a good proof of this point, with the widespread use of […]

Pneumatic actuators as an important equipment, in many industries have a good use. It can use for all kinds of […]

July 16, 2020 butterfly valve As the speed of AT pneumatic actuators increases, the impact of actuators and valves in the […]

Advantages: 1. Pneumatic device is simple in structure, light in weight, simple in installation and maintenance. The medium is air, […]

1. Pressure loss. Because liquids are viscous and have friction when flowing in pipelines, they must lose some energy in […]

The hydraulic control slow closing ball valve features small flow resistance coefficient, high degree of automation, complete functions, stable and […]

1. Shell. The shell is made of hard aluminum alloy, anodized and polyester powder coated, with strong corrosion resistance, protection […]

(1) Generally, strength test is not require for valves. But strength test shall conduct for valve body and bonnet after […]

1. Equipment environmental requirements. This PL series valve electric actuators can be used indoors or outdoors.This PL series valve electric […]

1. Manually turn the valve to check that there is no abnormal situation and make the valve in the full […]

Electric actuators are mainly used in the following three fields. 1. Power plant. Typical applications are: ① Application in thermal […]

1. Stroke of electric actuator. This parameter is also an important parameter. For the angle stroke electric actuator, the stroke […]

According to the movement mode of the controlled object, the electric actuator can divide into the following structural types: straight […]

Corrosion is one of the important elements that cause valve damage. Therefore, in valve protection, valve anti-corrosion is an important […]

Valve drive mode： According to the movement mode of the driving mechanism, the valve driving device is divided into two […]

For valves, not only installation and regular maintenance, but also operation. Generally, the opening and closing of the valve shall […]