Valve positioner classification

The valve positioner is divided into a pneumatic valve positioner, an electric valve positioner and a smart valve positioner according to the input signal. The input signal of the pneumatic valve positioner is a standard gas signal, for example, a 20~100kPa air signal, and the output signal is also a standard gas signal. The input signal of the electric valve positioner is a standard current or voltage signal, for example, a 4~20mA current signal or a 1~5V voltage signal, etc., the electric signal is converted into an electromagnetic force inside the electric valve positioner, and then the gas signal is output to the toggle. Control valve. The intelligent electric valve positioner converts the current signal outputted by the control chamber into a gas signal for driving the regulating valve. According to the frictional force of the valve stem when the regulating valve is operated, the unbalanced force generated by the fluctuation of the medium pressure is offset, so that the valve opening degree corresponds to the control. The current signal output from the room. And the intelligent configuration can be set to the corresponding parameters to achieve the purpose of improving the performance of the control valve.

According to the direction of the action, it can be divided into a one-way valve positioner and a two-way valve positioner. When the one-way valve positioner is used in a piston actuator, the valve positioner has only one direction. The two-way valve positioner acts on both sides of the piston actuator cylinder and acts in both directions.

The gain symbol of the valve positioner output and the input signal is divided into a positive acting valve positioner and a reaction valve positioner. When the input signal of the positive acting valve positioner increases, the output signal also increases, so the gain is positive. When the input signal of the reaction valve positioner increases, the output signal decreases, so the gain is negative.

The input signal according to the valve positioner is an analog signal or a digital signal, which can be divided into a common valve positioner and a field bus electric valve positioner. The input signal of the ordinary valve positioner is analog air pressure or current, voltage signal, and the input signal of the field bus electric valve positioner is the digital signal of the field bus.

According to whether the valve positioner with CPU can be divided into ordinary electric valve positioner and intelligent electric valve positioner. Ordinary electric valve positioners do not have a CPU, so they are not intelligent and cannot handle related intelligent calculations. The intelligent electric valve positioner with CPU can handle intelligent calculations. For example, it can perform nonlinear compensation of the forward channel. The field bus electric valve positioner can also carry functional modules such as PID to realize the corresponding calculation.

The detection method according to the feedback signal can also be classified.

For example, a valve positioner that detects a valve position signal by a mechanical linkage method: a valve positioner that detects a displacement of a valve stem by a method of detecting a displacement by a Hull effect: a valve positioner that detects a displacement of a valve stem by an electromagnetic induction method.

Apple House Container

Apple house container customization should pay attention to internal requirements
Many scenic spots now use apple cabin home. Such small houses are beautifully designed and fully functional. Generally speaking, such houses are transformed using containers. The price of color steel plates is still very favorable, and they can also be designed and constructed according to our needs, and the practicability is also guaranteed. However, you must determine the internal requirements when customizing.

Small and novel appearance design
The reason why many scenic spots and mobile stores now choose to use Pod Apple Cabin is actually because of its unique overall design style, and it is also very convenient to use. In addition to the choice of container materials, it can also be matched with various explosion-proof glass, etc. This kind of house is exquisite in style, unique, and also has a good eye-catching effect, which is very suitable for merchants to choose. And you can also design some distinctive styles according to your own needs. The practicality of such container houses is also very good.

Reasonable division of internal design functional areas
Container Home Apple Cabin needs to be divided into different functional areas because of its relatively small overall size and specifications, so we must also pay attention to the overall internal design requirements. Generally speaking, the design style of the Container House is relatively simple, and there is no load-bearing wall inside, so the functional areas can be divided according to actual needs. We only need to clarify our basic requirements, divide the interior well, and use certain screens or sliding doors. Such container houses are very convenient to use and can also meet the requirements of different businesses.

Pay attention to the overall load bearing
Even if it is a small apple house, it is also necessary to pay attention to the load-bearing situation. It is generally recommended to choose light decoration, which can effectively reduce the overall weight. It is recommended to do a comprehensive design well, and also pay attention to the basic load-bearing capacity of the container house and whether there are other design requirements. You can directly contact the manufacturer for customized processing, which can ensure that the size and specifications of the container house meet the requirements, and the price is also very favorable.

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Henan Jinming Metal Material Co., Ltd. , https://www.jinminghouse.com