A gate valve is a device used to stop and start the flow of liquid and isolate sections of a water supply as required. Sometimes referred to as a sluice valve, there are many different types of gate valves suitable for various applications in utility distribution, industrial and HVAC pipeline settings.The gate valve is a gate that opens and closes. 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.
In most cases, turning a gate valve anticlockwise will open it, while turning it clockwise will close it. These directions will normally be marked on the handwheel or elsewhere on the outer body of the valve.
Because the function of the gate valve is only to switch, the classification of gate valves is not huge. The main difference lies in the material and switching method. Below YINUO,China will introduce it to customers in detail.
Different material of gate valve
According to the classification of shell/body material, gate valves can be divided into:
Metal material valves: such as carbon steel valves, alloy steel valves, stainless steel valves, cast iron valves, titanium alloy valves, Monel valves, copper alloy valves, lead alloy valves, etc.
Metal body lined valves: such as rubber-lined valves, fluorine-lined valves, lead-lined valves, plastic-lined valves, and enamel-lined valves.
Non-metal material valves: such as ceramic valves, glass valves, plastic valves.
Among them, ductile iron gate valves are widely used in petroleum, chemical industry, electric power and other industrial fields for several advantages.
Advantages of ductile iron gate valve
High strength
The high strength of ductile iron valves gives them good toughness and durability, and they can work in various harsh environments such as high pressure and high temperature.
Anti-corrosion
Ductile iron valves have good anti-corrosion properties, will not be corroded by chemicals, and are not prone to rust.
Durable
Ductile iron valves have high material density and small friction coefficient, so they are more wear-resistant than other metal materials and can be used for a long time under high speed and high pressure.
Dimensions are accurate
Ductile iron valves have high processing precision and accurate dimensions, which can ensure tight integration and avoid problems such as leakage.
Common sizes of gate valves
As mentioned above, one of the advantages of ductile iron gate valves is dimensional accuracy. Then let us introduce to customers the general dimensions of ductile iron gate valves.
The caliber specifications of gate valves are divided into DN (nominal pipe diameter) and NPS (American National Pipe Standard), where DN is in millimeters and NPS is in inches. Commonly used caliber specifications include DN50, DN80, DN100, DN150, etc., and the corresponding NPS specifications are 2 inches, 3 inches, 4 inches, 6 inches, etc. The flange dimensions of gate valves are divided into PN and ANSI standards. The PN flange is made according to DIN standards, and the ANSI flange is made according to ASME standards. Commonly used flange sizes include PN10, PN16, PN25, PN40, ANSI150, ANSI300, etc.
3/4 inch gate valve is an example.3/4 is the nominal diameter of the valve (inlet and outlet diameters), 3/4 inch pipe diameter is equivalent to the nominal diameter of DN20 (20mm) pipe diameter.
YINUO,China is more than willing to provide buyers with guidance on size selection.
Switching method of gate valve
Gate valves are also divided into flat gate valves and slide gate valves according to the type of structure. These represent two different types of switching.Slide gate valve structure is simple and wear-resistant, can be high-speed and efficient to complete the cut-off of the fluid.4 inch slide gate valve is very common among them.
YINUO specialize in producing all types of gate valve,and promise buyers the best quality and service from China.If you have any needs or interest,please call us.