What Should I Do If the Valve is Not Closed?

When the valve such as DIN Lift Check Valve is in use, there are often some troublesome problems. For example, if the valve is not tight and the door is not tight, what should I do?

Under normal circumstances, if the door is not tight, first confirm whether the valve such as Pneumatic Drive Type Butterfly Valve is closed. If it is closed, there is still a leak and it cannot be sealed. Then check the sealing surface. Some valve seals are detachable, so take them out for grinding and test again. If it is still not strict, then it is necessary to return to the factory for repair or replacement of the valve, so as not to affect the normal use of the valve and the occurrence of working conditions and other problems.

If the valve such as 125LB OS & Y Gate Valve is not tight, you should first find out where the problem is, and then solve the problem according to the corresponding method.

Four Indicators to Measure Valve Quality

1. Control (determine the reliability of valve action)

The failure of the control system of the main steam valve such as Electric Drive Type Butterfly Valve and the reheat steam valve is one of the five major accidents of the steam turbine. The main performance is that the opening degree is inconsistent with the design, including the failure of the transmission mechanism, the lead ahead, and the lag, which affect the strength and vibration of the valve.

2. Strength (should meet life and rigidity requirements)

The frequent start-up of the unit has a particularly important influence on the valve strength and valve service life, especially the steam turbine with the regulating valve speed. The previous research focuses on the control problem of the valve such as DIN Resilient Seat Non Rising Stem Gate Valve. It seems that the strength problem can not be ignored.

3. Vibration

Changes in valve opening, poor dynamic performance of the actuator, and leakage of the valve body are all causes of vibration. The vibration itself has little damage to the valve itself, but it has a great influence on the whole unit, which is caused by low frequency oscillation.

4. Leakage (internal and external leakage)

Leakage is not only the cause of vibration, but also the leakage of external leakage, which also causes energy loss.

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Where Are The Butterfly Valves Applied?

When you Wholesale Cast Steel Butterfly Valve, you should know the butterfly valve is also called a disc valve, and the opening and closing member is a disc-shaped disc plate and can rotate around the axis of the valve body. Mainly composed of valve body, valve stem, disc and sealing ring. The valve body has a cylindrical shape with a short axial length and a built-in disc. The disc plate is driven by the valve stem. If it is rotated through 90°, it can be opened and closed once. The flow rate of the medium can be controlled by changing the deflection angle of the disc. The main seal is a sealing ring. The butterfly valves commonly used according to the application and medium have two types: clip-on butterfly valve and flange type butterfly valve. The wafer type butterfly valve uses a stud bolt to connect the valve between the two pipe flanges. The flange type butterfly valve has a flange on the valve, and the flanges on both ends of the valve are connected to the pipe flange by bolts.

The butterfly valve is suitable for regulating and cutting off various corrosive and non-corrosive fluid media in the engineering systems of furnace, gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting and power generation and environmental protection. The flow of the medium.

We supply Butterfly Valve. And if you Wholesale Din Strainer and DIN Resilient Seat Non Rising Stem Gate Valve, you can aslo contact us.

The Purpose and Advantages and Disadvantages of The Globe Valve

The main purpose of the shut-off valve such as DIN angle type Globe Valve is to shut off, but also to roughly adjust the flow, but not as a throttle. The shut-off valve is widely used in power plants, especially in smaller passages. When a good shut-off seal is required, this type of valve is often used.

(1) Advantages:

The structure is simple, the sealing is good, and the manufacturing and maintenance are convenient.

(2) Disadvantages:

The fluid resistance is large, the opening and closing forces are large, and the speed increases as the cross-sectional area of the passage increases. Therefore, it is difficult to make a shut-off valve with a large cross-sectional area and a very reliable passage.

We supply globe valve and 10K Resilient Seat Gate Valve. If you have demand about our products, welcome to our website know more detail.

How Does the Valve Perform Routine Maintenance?

1. For long-term storage, the valve maybe from China Cast Iron Gate Valve manufacturer should be inspected regularly. The exposed surface should be kept clean and the dirt should be removed. The ball valve should be blocked at both ends and open when stored. Gate valve, globe valve, check valve, both ends of the channel should be Blocked and closed, neatly stored in a ventilated and dry place indoors, no stacking or open storage.

2. Before installation, the pressure of the valve mark must be checked carefully, whether the diameter meets the requirements for use, eliminate the defects caused by the transportation process, and eliminate the dirt of the valve parts.
3. When installing, the valve maybe from China Casting Valve Manufacturers can be directly installed on the pipeline according to the connection mode. Under normal circumstances, it can be installed at any position of the pipeline, but it is easy to operate. Note that the flow direction of the shut-off valve should be upward from the longitudinal valve flap. The lift check valve can only be installed horizontally.

If you want to Wholesale Angle Globe Valve or other valves, welcome to contact us.