Valve manufacturers
By function and use
(1) Shut-off valve
This type of valve is for opening and closing. Permanently installed on the inlet and outlet of cold and heat sources, equipment inlet and outlet, and branch lines of pipelines (including standpipes), and can also be used as water and air relief valves. Common shut-off valves include gate valves, globe valves, ball valves and butterfly valves.
Gate valve can be divided into open rod and dark rod, single gate and double gate, wedge gate and parallel gate, etc. The closing tightness of the gate valve is not good, and the large-diameter gate valve is difficult to open; the valve body size is small in the direction of water flow, the flow resistance is small, and the nominal diameter of the gate valve span is large.
According to the flow direction of the medium, the globe valve is divided into three types: straight-through type, right-angle type and direct-current type, and there are open rods and dark rods. The closing tightness of the globe valve is better than that of the gate valve, the valve body is long, the flow resistance is large, and the maximum nominal diameter is DN200.
The valve core of the ball valve is a round ball with a hole. When the valve stem is moved by the plate, it is fully open when the opening of the sphere is facing the axis of the pipeline, and fully closed when it is rotated 90°. The ball valve has a certain adjustment performance and is closed more tightly.
The valve core of the butterfly valve is a circular valve plate, which can rotate along the vertical axis perpendicular to the axis of the pipeline. When the plane of the valve plate is consistent with the axis of the pipe, it is fully open; when the plane of the gate plate is perpendicular to the axis of the pipe, it is fully closed. Butterfly valve body length is small, flow resistance is small, and the price is higher than gate valve and globe valve.
Valve manufacturers
(2) Check valve
This type of valve is used to prevent the backflow of the medium. It uses the kinetic energy of the fluid itself to open by itself, and automatically closes when the flow is reversed. Permanently located at the outlet of the pump, the outlet of the steam trap and other places where the reverse flow of the fluid is not allowed. Check valves are divided into three types: swing type, lift type and wafer type. For the swing check valve, when the fluid can only flow from left to right, it automatically closes when the flow is reversed. For the lift check valve, when the fluid flows from left to right, the valve core is lifted to form a passage, and when the fluid flows in the opposite direction, the valve core is pressed against the valve seat and closed. For the wafer check valve, when the fluid flows from left to right, the spool is opened to form a passage. When the fluid flows in the opposite direction, the spool is pressed against the valve seat and closed. The wafer check valve can have multiple positions. Installation, small size, light weight and compact structure.
(3) Control valve
The pressure difference between the front and rear of the valve is constant. When the opening degree of the ordinary valve changes within a large range, the flow rate changes little, and when it reaches a certain opening degree, the flow rate changes sharply, that is, the adjustment performance is poor. The regulating valve can change the valve spool stroke to change the resistance number of the valve according to the direction and size of the signal, so as to achieve the purpose of regulating the flow of the valve. The regulating valve is divided into manual regulating valve and automatic regulating valve, and there are many types of manual or automatic regulating valve, and their regulating performance is also different. Automatic regulating valves include self-operated flow regulating valves and self-operated differential pressure regulating valves.
(4) Vacuum class
Vacuum type includes vacuum ball valve, vacuum flapper valve, vacuum inflation valve, pneumatic vacuum valve, etc. Its function is in the vacuum system, the vacuum system components used to change the direction of the airflow, adjust the airflow, and cut off or connect the pipeline are called vacuum valves.
(5) Special purpose
Special purpose categories include pigging valves, venting valves, blowdown valves, exhaust valves, filters, etc.
The exhaust valve is an indispensable auxiliary component in the pipeline system, and is widely used in boilers, air conditioners, oil and gas, water supply and drainage pipelines. It is often installed at the commanding heights or elbows, etc., to remove excess gas in the pipeline, improve the efficiency of the pipeline and reduce energy consumption.
Valve manufacturers
Liaoning Yuanlu Machinery Equipment Manufacturing Co., Ltd. is a Taiwanese-invested enterprise that develops and manufactures water supply and drainage valves, industrial valves and their automatic control systems and environmental protection equipment. The main products are gate valve, globe valve, ball valve, butterfly valve, check valve, regulating valve, etc. 12 categories, more than 200 series, more than 4000 specifications, widely used in petroleum, petrochemical, chemical, electric power, metallurgy, water conservancy, medicine, Municipal construction, water supply and drainage and other fields of the national economy.
Tel: 133-3231-9780