Valve Components - Qingdao XingHeXing Precision Industry Co.,Ltd.

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What Is Valve?

Valves are pipeline accessories used to open and close pipelines, control flow, adjust and control the parameters (temperature, pressure and flow) of the conveying medium. According to its function, it can be divided into shut-off valve, check valve, regulating valve and so on.

The valve is a control component in the fluid conveying system, which has the functions of cut-off, regulation, diversion, prevention of reverse flow, stabilization, diversion or overflow and pressure relief. Valves used in fluid control systems, ranging from the simplest shut-off valves to the various valves used in extremely complex automatic control systems, have a wide range of varieties and specifications.

Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. Valves are also divided into cast iron valves, cast steel valves, stainless steel valves (201, 304, 316, etc.) according to materials, chromium molybdenum steel valves, chromium molybdenum vanadium steel valves, duplex steel valves, plastic valves, non-standard customized valves, etc.

Classification Of Valves

By function and purpose

Shut-off Valve

This type of valve is used for opening and closing. It is standing on the inlet and outlet of cold and heat sources, equipment inlet and outlet, pipeline branch line (including standpipe), and can also be used as a drain valve and air release valve. Common shut-off valves include gate valves, globe valves, ball valves and butterfly valves. Gate valves can be divided into exposed rod and concealed 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 along the water flow direction is small, the flow resistance is small, and the gate valve has a large nominal diameter span.

According to the flow direction of the medium, the shut-off valve is divided into three types: straight-through, right-angle and direct-flow. There are bright rods and concealed 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 spool of the ball valve is a round ball with an opening. The sliding valve stem makes the sphere fully open when the opening of the sphere is directly on the axis of the pipeline, and it is fully closed when it is turned 90°. The ball valve has a certain adjustment performance and closes tightly.

The valve core of the butterfly valve is a circular valve plate, which can rotate along a vertical axis perpendicular to the pipeline axis. 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 is perpendicular to the axis of the pipe, it is fully closed. Butterfly valve has a small body length and low flow resistance, which is more expensive than gate valves and globe valves.

Check Valve

This type of valve is used to prevent the medium from flowing back, using the kinetic energy of the fluid itself to open by itself, and automatically close when it flows in the reverse direction. Standing at the outlet of the water pump, the outlet of the steam trap, and other places where the reverse flow of fluid is not allowed. There are three types of check valves: swing type, lift type and wafer type. For the swing check valve, when the fluid can only flow from left to right, it will automatically close when it flows in the reverse direction. 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 flow is reversed, the valve core is pressed to the valve seat and closed. For the wafer check valve, when the fluid flows from left to right, the valve core is opened to form a passage. When the flow is reversed, the valve core is pressed to the valve seat and closed. The wafer check valve can be multiple positions Installation, small size, light weight and compact structure.

Regulating Valve

The pressure difference between the front and rear of the valve is constant. When the opening of the ordinary valve changes within a large range, the flow rate does not change much, and when the opening degree is reached, the flow rate changes sharply, that is, the regulation performance is poor. The control valve can change the valve core stroke according to the direction and size of the signal to change the resistance of the valve, so as to achieve the purpose of regulating the flow of the valve. Regulating valves are divided into manual regulating valves and automatic regulating valves, and manual or automatic regulating valves are divided into many types, and their regulating performance is also different. Automatic control valves include self-operated flow control valves and self-operated differential pressure control valves.

Vacuum

Vacuum category includes vacuum ball valve, vacuum baffle valve, vacuum charging valve, pneumatic vacuum valve, etc. Its function is to change the direction of air flow, adjust the size of air flow, and cut off or connect the pipeline in the vacuum system. The vacuum system components are called vacuum valves.

Special Purpose

Special purpose categories include pigging valves, vent valves, drain valves, exhaust valves, filters, etc. The exhaust valve is an indispensable auxiliary component in the pipeline system, which is widely used in boilers, air conditioners, oil and gas, and water supply and drainage pipelines. It is often installed at high points or elbows, etc., to remove excess gas in the pipeline, improve the efficiency of pipeline road use and reduce energy consumption.

What Components We Do For Valves?

At XHX Precision Industry, you can find the valve components for any standard valves, such as GB, DIN, API & ANSI, KS & JIS, BS, Russia standard, etc. And materials including but not limited to cast iron, steel, stainless steel, copper etc.

The main valve components we produced for

Ball valve

Butterfly valve

Y-Strainer

Gate valve

Plug valve

And much more

Check valve

High pressure valve

Fixed base

Globe valve

Release valve

Adjusting arm