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; […]
Discussion on the problems of non-action of pneumatic control valves.
Pneumatic control valve does not operate: 1. No signal, no air source. 1) The air source is not open; 2) […]
Introduction of electric actuators.
Electric actuators are mainly use in power plants or nuclear power plants. Because a smooth, stable and slow process is […]
Causes and solutions of vibration of pneumatic actuators.
Pneumatic actuators are a kind of classification in actuators. From the perspective of technical performance, the advantages of pneumatic actuators […]
Inspection standards and methods for pneumatic actuators.
1. Fix the pneumatic actuator on the test table and connect the air source, control air source and displacement detection […]
Preparation of pneumatic actuators before inspection.
Pneumatic actuators also known as pneumatic head pneumatic head, is driven by air pressure to open and close or adjust […]
How to solve the problem of slow response of AT pneumatic actuators?
The use of AT pneumatic actuators sometimes shows a slow reaction, which undoubtedly greatly affects the working efficiency of AT […]
Classification of pneumatic actuators.
Pneumatic actuators are driven by air pressure to open and close or adjust the valve actuators, commonly known as pneumatic […]
Function of valve positioner and classification.
Valve positioner is the main accessory of pneumatic actuator control valve. It takes stem displacement signal as input feedback measurement […]
The main embodiment of diversification and energy-saving development of pneumatic actuators.
Actuators have pneumatic and electric two forms, usually we understand more about pneumatic actuators. But pneumatic actuators from the technical […]
Working principle of pneumatic valve.
Pneumatic valves in regulating valve are characteristic of the valve. Because of the pneumatic valve is connect to the pneumatic […]
How to solve the problem of pneumatic valve opening and closing jitter?
The more and more widely used pneumatic valve is a good proof of this point, with the widespread use of […]
Pneumatic actuators have three major self-protection functions.
Pneumatic actuators as an important equipment, in many industries have a good use. It can use for all kinds of […]
How to improve the switching speed of AT pneumatic actuators？
As the speed of AT pneumatic actuators increases, the impact of actuators and valves in the off or open position […]
Advantages and disadvantages of pneumatic components.
Advantages: 1. Pneumatic device is simple in structure, light in weight, simple in installation and maintenance. The medium is air, […]
Common faults in hydraulic system.
1. Pressure loss. Because liquids are viscous and have friction when flowing in pipelines, they must lose some energy in […]
Advantages and disadvantages of hydraulic system.
Hydraulic valves are widely used in water, steam, sewage, papermaking, petrochemical industry, solution and slurry two phase mixed flow medium, […]
Application of hydraulic control valve.
The hydraulic control slow closing ball valve features small flow resistance coefficient, high degree of automation, complete functions, stable and […]
The characteristics of explosion-proof electric actuator performance.
1. Shell. The shell is made of hard aluminum alloy, anodized and polyester powder coated, with strong corrosion resistance, protection […]
Notes for valve test pressure.
(1) Generally, strength test is not require for valves, but strength test shall conduct for valve body and bonnet after […]
Operating requirements for electric actuators.
1. Equipment environmental requirements. This PL series valve electric actuators can be used indoors or outdoors. This PL series […]
Notes for installation of electric actuator and valve.
1. Manually turn the valve to check that there is no abnormal situation and make the valve in the full […]
Application field of electric actuators.
Electric actuators are mainly used in the following three fields. 1. Power plant. Typical applications are: ① Application in thermal […]
Important parameters of electric actuators.
1. Stroke of electric actuator. This parameter is also an important parameter. For the angle stroke electric actuator, the stroke […]
The structural form of the electric actuators.
According to the movement mode of the controlled object, the electric actuator can divide into the following structural types: straight […]
How to protect the valve from corrosion?
Corrosion is one of the important elements that cause valve damage. Therefore, in valve protection, valve anti-corrosion is an important […]
Characteristics and selection of various valve driving devices.
Valve drive mode： According to the movement mode of the driving mechanism, the valve driving device is divided into two […]
How to operate valves correctly?
For valves, not only installation and regular maintenance, but also operation. Generally, the opening and closing of the valve shall […]
Maintenance of valve in use.
During the use of the valve, attention should be paid to the maintenance. Good maintenance can ensure the reliable operation […]
Cause and maintenance of overload of electric actuators.
Overload may occur if: 1. The power supply voltage is low, and the required torque is not obtain. So that […]
The selection principle of electric actuator.
In general, the correct choice of electric actuator is based on the following: 1. Operating torque. Operating torque is […]
Main valve standard: DIN standard or EN standard.
At present, the international each country for the use of the valve standards are not the same. Because of the […]
Difference between electric butterfly valve and electric gate valve.
Electric butterfly valve definition: Electric butterfly valve is one of the most commonly used valves in industrial pipelines. Butterfly […]
Notes for use of telescopic flange butterfly valve.
Flange retractable butterfly valve , not only for the valve disassembly and assembly to bring convenience. And can relieve […]
Structure characteristics and basic principle of ventilation butterfly valve.
Ventilation butterfly valve is a kind of non closed butterfly valve. The ventilation butterfly valve is use in the dust […]
Selection of electric actuator for electric butterfly valve.
As the electric butterfly valve is compose of butterfly valve and electric device. How to select the electric device correctly […]
Introduction of PVC butterfly valves.
PVC butterfly valve is plastic butterfly valve. Plastic butterfly valve has strong corrosion resistance, wide application range, wear resistance, […]
Common troubleshooting methods in the operation of electric butterfly valve.
1. Before the installation of electric butterfly valve, confirm whether the product performance and medium flow direction arrow of the […]
Analysis of common faults of the newly installed electric butterfly valve.
Electric butterfly valve is the main control butterfly valve in the production process automation system. It is an important implementation […]
Characteristics of electric butterfly valve gear drive.
1) Instantaneous transmission ratio is stable. Work stability is high. 2) Non-circular gear design. Instantaneous transmission ratio can be […]
Relevant certification of valves.
1. ISO 9001 quality system certification. The role of the certification is to establish a quality assurance system from […]
Introduction of high performance butterfly valves.
High performance butterfly valve is a kind of butterfly valve with Telfon lining in the inner cavity of the […]
The features of triple eccentric butterfly valves.
1. API specifications. As is well known, API609 has become a de facto international specification for valves used in important […]
Advantages and USES of triple-eccentric metal seated butterfly valves.
In order to meet the requirements of various working conditions, butterfly valves have experienced the evolution from concentric to […]
The size diaphragm of pneumatic flange butterfly valves(PN16).
DN In pipe diameter OD of seal surface PN16 flange OD PCD BOLTS&Length Thinkness 40 1.5 45 85 150 110 […]
The size diaphragm of pneumatic flange butterfly valves(PN10).
The size diagram of pneumatic butterfly valves is as follows, for reference only: DN In Pipe diameter Outside diameter of […]
How to select the accessories of pneumatic butterfly valves?
(1) Pneumatic butterfly valve accessories mainly include: positioner, converter, actuator, booster valve, position-preserving valve, pressure-reducing valve, filter, oil mist, travel […]
How to maintain pneumatic butterfly valves? (II)
Installation requirements: 1. Confirm the flange welding is correct. Do not weld the flange after the butterfly valve is install […]
How to mantain pneuamtic butterfly valves?(I)
Installation precautions: 1, Before installation should keep dry, not stored in the open air. 2, Before the installation of butterfly […]
The selection and installation of pneumatic actuators
How to choose pneumatic actuators? Usually adopts the new series of AT pneumatic actuators that have double acting and single […]
Installation requirements of pneumatic butterfly valves
Installation precautions as below: 1. Before installation, check that all parts of the pneumatic butterfly valve are free of missing […]
The working principle and characteristics of pneumatic butterfly valves
The working principle: Pneumatic butterfly valve is a kind of pneumatic valve which uses the circular butterfly plate rotating with […]
Installation and maintenance of butterfly valves.
Key points of product selection. 1. The main control parameters of butterfly valve are specification and size. 2, Butterfly valve […]
National standard of butterfly valves
Butterfly valve national standard refers to the standard approved and issued by the national standardization authority and unified nationwide. The […]
How to classify butterfly valves?
1. According to the driving mode: (1) Electric butterfly valve. (2) Pneumatic butterfly valve. (3) Hydraulic butterfly valve. (4) Manual […]
The features of butterfly valve.
1. Butterfly valve has the characteristics of simple structure, small volume, light weight, low material consumption, small installation size, […]