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Company Name: Shanghai Qiantuo Trading Co., Ltd.

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How to extend the life of American ASCO solenoid valve

浏览次数:3525 返回列表 Release time: 2016-08-11 Browsing times: 3525Back to list

How to extend the life of American ASCO solenoid valve

The simplest ASCO solenoid valve in the United States is to thicken the valve seat to increase the valve seat hole and form a longer throttle passage. On the one hand, it can cause the sudden expansion of the flow-closed throttle to postpone, and it can act as a transfer and destruction position to keep it away from the sealing surface; on the other hand, it increases the throttle resistance, reduces the degree of pressure recovery, and makes the steam The eclipse is weakened. Some of the valve seat holes are designed to be stepped or waved, just to increase resistance and weaken cavitation. This method is often used in the high-pressure valve introduced in the device and when the old valve is improved, it is also very effective.

The American ASCO solenoid valve reduces the diameter to increase the working opening and improves the life method. By reducing the valve diameter to increase the working opening, the specific methods are: ① change a smaller-caliber valve, such as DN32 to DN25; ② The valve body is not changed, replace the valve seat with a small seat diameter. For example, when a chemical plant is overhauled, the throttle dgl0 is replaced by dg8, and the service life is doubled.

The ASCO solenoid valve of the United States increases the working opening and extends the life method to reduce S, that is, to increase the loss of the system except the control valve, so that the pressure drop distributed to the valve is reduced. In order to ensure that the flow passes through the control valve, the opening of the control valve must be increased At the same time, the pressure drop on the valve is reduced, so that cavitation and erosion are also weakened. Specific methods include: setting a throttling orifice consumption pressure drop behind the valve; closing the manual valve in series on the pipeline until the regulating valve obtains a more ideal working opening.

This method is very simple, convenient, and effective when the valve selection is at a small opening at the beginning.

The American ASCO solenoid valve working life extension method allows the regulating valve to work as wide as possible from the beginning, such as 90%. In this way, cavitation, erosion and other damage occurs on the head of the spool. As the spool breaks and the flow rate increases, the corresponding valve closes a little more. This keeps damaging and gradually closing, so that the entire spool is fully utilized until the root of the spool and the sealing surface are damaged and cannot be used. At the same time, the large throttling operation has a large throttling gap and weakened erosion, which increases the life of the valve by 1 to 5 times over the middle and small openings from the beginning. If a chemical plant adopts this method, the service life of the valve is increased by 2 times.

The flow direction of the American ASCO solenoid valve is to increase the life of the flow. The open type flows toward the open direction. Cavitation and erosion mainly act on the sealing surface, which quickly damages the root of the valve core and the sealing surface of the valve seat. After the flow, cavitation and erosion act on the throttling, below the sealing surface of the valve seat, the sealing surface and the root of the valve core are protected, and the life is extended.

The valve used as a flow-open type, when the problem of extending the life is more prominent, only need to change the flow direction to extend the life 1 to 2 times.
The American ASCO solenoid valve structure life improvement method adopts the method of changing the valve structure or selecting a valve with a longer life to achieve the purpose of improving life, such as the selection of multi-stage valves, anti-cavitation valves, corrosion-resistant valves, etc.

The American ASCO solenoid valve uses special materials to increase the life-span method for anti-cavitation (destructive shapes such as honeycomb small dots) and erosion (streamline small grooves). Special materials resistant to cavitation and erosion can be used to manufacture throttles. This special material includes 6YC-1, A4 steel, Stellite, cemented carbide, etc. In order to resist corrosion, it is possible to use materials that are more resistant to corrosion and have certain mechanical and physical properties. This material is divided into non-metallic materials (such as rubber, PTFE, ceramics, etc.) and metallic materials (such as Monel, Hastelloy, etc.).

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