Discussion on the instability and vibration of pneumatic control valves.
The action of pneumatic actuator control valve is unstable: 1. Unstable air source pressure. 1) Compressor capacity is too small; […]
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 […]
As the speed of AT pneumatic actuators increases, the impact of actuators and valves in the off or open position […]
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 […]
Hydraulic valves are widely used in water, steam, sewage, papermaking, petrochemical industry, solution and slurry two phase mixed flow medium, […]
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 […]
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 […]
During the use of the valve, attention should be paid to the maintenance. Good maintenance can ensure the reliable operation […]
Overload may occur if: 1. The power supply voltage is low, and the required torque is not obtain. So that […]
In general, the correct choice of electric actuator is based on the following: 1. Operating torque. Operating torque is […]
At present, the international each country for the use of the valve standards are not the same. Because of the […]
Electric butterfly valve definition: Electric butterfly valve is one of the most commonly used valves in industrial pipelines. Butterfly […]
Flange retractable butterfly valve , not only for the valve disassembly and assembly to bring convenience. And can relieve […]
Ventilation butterfly valve is a kind of non closed butterfly valve. The ventilation butterfly valve is use in the dust […]
As the electric butterfly valve is compose of butterfly valve and electric device. How to select the electric device correctly […]
PVC butterfly valve is plastic butterfly valve. Plastic butterfly valve has strong corrosion resistance, wide application range, wear resistance, […]
1. Before the installation of electric butterfly valve, confirm whether the product performance and medium flow direction arrow of the […]
Electric butterfly valve is the main control butterfly valve in the production process automation system. It is an important implementation […]
1) Instantaneous transmission ratio is stable. Work stability is high. 2) Non-circular gear design. Instantaneous transmission ratio can be […]
1. ISO 9001 quality system certification. The role of the certification is to establish a quality assurance system from […]
High performance butterfly valve is a kind of butterfly valve with Telfon lining in the inner cavity of the […]
1. API specifications. As is well known, API609 has become a de facto international specification for valves used in important […]
In order to meet the requirements of various working conditions, butterfly valves have experienced the evolution from concentric to […]
DN In pipe diameter OD of seal surface PN16 flange OD PCD BOLTS&Length Thinkness 40 1.5 45 85 150 110 […]
The size diagram of pneumatic butterfly valves is as follows, for reference only: DN In Pipe diameter Outside diameter of […]
(1) Pneumatic butterfly valve accessories mainly include: positioner, converter, actuator, booster valve, position-preserving valve, pressure-reducing valve, filter, oil mist, travel […]
Installation requirements: 1. Confirm the flange welding is correct. Do not weld the flange after the butterfly valve is install […]
Installation precautions: 1, Before installation should keep dry, not stored in the open air. 2, Before the installation of butterfly […]
How to choose pneumatic actuators? Usually adopts the new series of AT pneumatic actuators that have double acting and single […]
Installation precautions as below: 1. Before installation, check that all parts of the pneumatic butterfly valve are free of missing […]
The working principle: Pneumatic butterfly valve is a kind of pneumatic valve which uses the circular butterfly plate rotating with […]
Key points of product selection. 1. The main control parameters of butterfly valve are specification and size. 2, Butterfly valve […]
Butterfly valve national standard refers to the standard approved and issued by the national standardization authority and unified nationwide. The […]
1. According to the driving mode: (1) Electric butterfly valve. (2) Pneumatic butterfly valve. (3) Hydraulic butterfly valve. (4) Manual […]
1. Butterfly valve has the characteristics of simple structure, small volume, light weight, low material consumption, small installation size, […]