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Classification of pneumatic flow valves

Classification of pneumatic flow valves

(Summary description)Pneumatic flow valve is composed of a preset manual regulating valve group and an automatic balance valve group that maintains constant flow. It is suitable for water systems that require constant flow control, especially for heating, air conditioning and other non-corrosive Constant flow of liquid media.

Classification of pneumatic flow valves

(Summary description)Pneumatic flow valve is composed of a preset manual regulating valve group and an automatic balance valve group that maintains constant flow. It is suitable for water systems that require constant flow control, especially for heating, air conditioning and other non-corrosive Constant flow of liquid media.

Information

  Pneumatic flow valve is composed of a preset manual regulating valve group and an automatic balance valve group that maintains constant flow. It is suitable for water systems that require constant flow control, especially for heating, air conditioning and other non-corrosive Constant flow of liquid media. It can automatically eliminate the hydraulic imbalance caused by various factors, overcome the problem of "uneven heating and cooling", improve the quality of heating and air conditioning, and improve the level of energy efficiency. product.

 

Classification of pneumatic flow valves

 

  

The constant flow valve and constant flow control valve in the pneumatic flow valve are variable resistance devices. They are all driven by the differential pressure of the fluid, and automatically change the resistance coefficient according to the change of the pressure difference before and after the valve to achieve the balance of the entire pipeline network. Transmission and distribution, to eliminate the phenomenon of uneven heating and cooling. The difference between them is that the constant flow valve has only one disc, which cannot be adjusted online, and cannot implement energy-saving operation that changes the total amount. The constant flow valve is the action of changing the resistance in a compensating manner, and is also called a "compensating variable resistance regulating valve". So it can be variable. It can also be constant current, used in cooling and heating systems to achieve balanced transmission and distribution of cold and heat, and can also be changed at any time according to needs.

Pneumatic flow valves can be divided into throttling valves that control the total amount of fluid by changing the throttling section or length according to their purposes. They should lack the negative feedback function and cannot compensate for the speed instability caused by load changes. Large or low speed stability requirements.

The throttle valve with added pressure compensation is also called the speed control valve, which is formed by the constant differential pressure reducing valve and the throttle valve in series. It maintains constant flow by keeping the pressure difference before and after the throttle valve unchanged, and can keep the pressure difference before and after the valve as a constant value even if the load pressure changes.

The diverter valve, which has been widely used in hydraulic pipelines, is also called speed synchronization valve. When two or more cylinders are subjected to different loads, the diverter valve can still ensure the same movement. It can be subdivided into equal amount valve and proportional valve. If the proportional distribution of the flow into the valve can be achieved, it is called a collector valve, and its function is the opposite of a diverter valve.

The diverting and collecting valve has the functions of both the distribution valve and the collecting valve. It is also called the synchronization valve. The synchronous control hydraulic system using the synchronous valve has many advantages such as simple structure, low cost, easy manufacture and strong reliability, so the synchronous valve has been widely used in the hydraulic system.

The effective range of the automatic adjustment of the pneumatic flow valve depends on the performance of the working spring. Generally, the pressure difference before and after the valve can be effectively controlled according to the set value within the range of 20-300kPa. When the differential pressure is insufficient, the control range will be limited, and when the differential pressure exceeds the limit, noise will be generated.

 

 

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