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The difference between rising stem gate valve and non-rising stem gate valve
The difference on the stem The rising stem gate valve is a lift type, while the non-rising stem gate valve is not a lift type. The difference in transmission mode Rising stem gate valve is a handwheel that drives the nut to rotate in place, and the valve stem is linearly raised and lowered to com...Read more -
What does the valve arrow on the body mean?
The arrow marked on the valve body indicates the recommended bearing direction of the valve, not the flow direction of the medium in the pipeline. The valve with bi-directional sealing function can not be marked with the indicating arrow, but also marked with the arrow, because the valve arrow re...Read more -
Selection of butterfly valve for water supply pipeline
1.Centerline butterfly valve and eccentric butterfly valve Centerline butterfly valve and eccentric butterfly valve have their own advantages and disadvantages，When selecting a model, it must be considered comprehensively in combination with its cost performance. Generally speaking, the center ...Read more -
What is the difference between a wafer butterfly valve and a flange butterfly valve?
Wafer butterfly valves and flange butterfly valves are two common types of butterfly valves. Both types of butterfly valves have a very wide range of applications, but many friends can’t distinguish between wafer butterfly valves and flanged butterfly valves, and they do...Read more -
Advantages of manual diaphragm valve structure
The advantages of diaphragm valves are similar to those of pinch valves. The closing element is not wetted by the process medium, so it can be made of cheaper materials in the corrosive process medium. The flow of the medium is straight or nearly straight, and produces a...Read more -
What are the valves for sea water
Reasonable selection of valve type can reduce material consumption, reduce local resistance and energy consumption, facilitate installation and reduce maintenance. In this article, Dongsheng Valve has introduced to you which valves are used for seawater. 1.Shut-off valve...Read more -
Butterfly check valve
Butterfly check valve refers to the valve that automatically opens and closes the disc depending on the flow of the medium itself, and is used to prevent the medium from flowing back. It is also called check valve, one-way valve, reverse flow valve, and back pressure valve. The check valve is a k...Read more -
What are the special requirements for the valve stem selection
The materials for manufacturing valve parts should be selected according to the following factors: 1. The pressure, temperature and characteristics of the working medium. 2. The force of the part and its function in the valve structure. 3. It has better manufacturability. 4. If the above conditio...Read more -
General requirements for the installation of seawater valves
The installation position of the valve should be arranged centrally on one side of the device area, and the necessary operation platform or maintenance platform should be provided.Valves that require frequent operation, maintenance and replacement should be located on th...Read more -
Ball valve installation
Ball valve installation: 1. Need to be confirmed that the pipeline and valve operation has been cleaned. 2. the actuator of the ball valve operation according to the size of the input signal to drive the stem rotation: forward rotation 1/4 (90°), the ball valve is closed. The ball valve is o...Read more -
Important protective measures when installing valves
When installing the valve, in order to prevent metal, sand and other foreign matter from entering the valve and damaging the sealing surface, a filter and flushing valve must be installed; in order to keep the compressed air clean, an oil-water separator or an air filter must be installed in fron...Read more -
Valves product: Production and inspection process
1. Raw materials of various specifications purchased by the company. 2. Conduct material test on raw materials with spectral analyzer, and print out material test report for backup. 3, With blanking machine for raw material cutting. 4. Inspectors check the cutting diameter and length of raw mater...Read more
