How to Choose Stainless Steel Gate Valves
date:2023-05-04 11:22
The opening and closing component of stainless steel gate valves is the gate, and the movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate has two sealing surfaces, and the commonly used mode of gate valve is that the two sealing surfaces form a wedge shape. The wedge angle varies depending on the valve parameters, usually 50, and is 2 ° 52 'when the medium temperature is not high. The gate plate of a wedge gate valve can be made into a whole, called a rigid gate plate; It can also be made into a gate that can produce slight deformation to improve its processability and compensate for the deviation of the sealing surface angle during the processing. This type of gate is called an elastic gate. Stainless steel materials are divided into 304 stainless steel, 316 stainless steel, and 321 stainless steel. The representation method is: Z41H-16P.
Selection of stainless steel gate valves
1. Based on the general standards of valves, such as valve specifications and categories, the main parameters include valve nominal diameter, nominal pressure, and temperature requirements;
2. Selection of stainless steel gate valve material. Choose materials suitable for oneself based on the working conditions, such as cast iron, cast steel, carbon steel, stainless steel, ceramics, etc. If the budget is insufficient, cast iron valves can be chosen. If the budget is sufficient, stainless steel gate valves are recommended. Because the service life of stainless steel gate valves can reach 10 times that of ordinary metal valves, which is very good
3. The operating mechanism of the valve; There are mainly manual, electric, pneumatic, manual hydraulic, electro-hydraulic, etc., which also need to be selected according to your specific needs and budget. If manually operated, the price is relatively low, and electric stainless steel gate valves are more convenient to use and can achieve automated operation.
4. Check if the performance test of the valve has been conducted, and the valve must undergo pressure testing before leaving the factory;
5. Check whether the internal and external anti-corrosion of the stainless steel gate valve meets the requirements;
6. As for the packaging and transportation method of stainless steel gate valves, lightweight blocking plates should be installed on both sides of the valve for sealing during transportation. Large diameter valves should also be packaged with a simple wooden frame to prevent damage during transportation. Medium and small diameter valves can be bundled with straw ropes and transported in containers. The Qigao gate valve is good, and the quality is proportional to the price, which is very popular
