Throttle valve refers to a valve that controls or regulates the flow and pressure of a medium by changing the passage area. Throttle valve is mainly used for throttling in pipeline.
Welded fence is made of high-quality low-carbon steel wire row welding, and then electro galvanized, hot dipped galvanized , PVC coating and other surface passivation , plasticizing welded mesh, frame, post, installation accessories and so on.
Among them, the most widely used is PVC coated fence, which has
Preservative
√ Anti-aging
√ Acid and alkali resistance
√ Do not fade
√ Too Much Flat Surface
√ Brightness and Colorful Perfect
Features:
Welded fences are mainly used for the enclosure and protection of highways, railways, airports, gardens, forests, venues, etc.
Welded Fence mainly includes
• 3D Bending Fence
• Y-Pillar Fence
• Dutch Net Fence
• 358 Anti-Climbing Fence
Welded Wire Mesh Fence,Brc Metal Fence,Welded Wire Mesh Fence For Garden,Welded Mesh Fence For Farm HEBEI JUNTAN METAL PRODUCTS CO., LTD. , https://www.juntanwiremesh.com
(a) Flexible throttle valve
The working principle of the flexible throttle valve relies on the valve stem to clamp the flexible rubber tube to generate the throttling effect. It is also possible to use the gas pressure instead of the valve stem compression hose. The flexible throttle valve has a simple structure, low pressure drop, and high reliability of operation. Insensitive to contamination, the working pressure range is usually 0.3-0.63 MPa.
(II) Overflow throttle valve
The overflow throttle valve is also a pressure compensation type throttle valve, which is formed by connecting an overflow valve and a throttle valve in parallel. The high-pressure oil at the inlet is partially passed through the throttle valve to the actuator, and the other part passes through the overflow port of the relief valve to the tank. The upper and lower pressure relief valves communicate with the pressure oil before and after the throttle valve. When the outlet pressure increases, the spool moves downward and closes the small overflow port. The overflow resistance increases and the inlet pressure increases, so the pressure difference before and after the throttle valve remains basically unchanged.
(III) Proportional Direction Throttle Valve
A proportional electromagnet is used instead of an ordinary electromagnet in an electromagnetic reversing valve to form a direct-acting proportional direction throttle valve. Due to the use of proportional electromagnets, the spool can not only be transposed, but also the stroke of the transposition can be continuously or proportionally changed, so that the flow area between the communicating ports can also be continuously or proportionally changed, so the proportional direction Throttle valve can not only control the direction of movement of the actuator, but also control its speed.
1. Due to the installation mode of mesh and column combination, it has the characteristics of simple structure, convenient installation, beautiful and practical. And it is easy to transport, and it is not limited by terrain fluctuations during installation.
2. For the southern area, especially some mountainous, sloping, and multi-bend areas on both sides of the expressway, it can be easily installed and strong.
3. Compared with other isolation barrier products, the price is moderate, which is very suitable for large-scale promotion on both sides of domestic highways of various grades.
Uses: used for guardrail protection of highways, railways, airports, residential quarters, ports, gardens, breeding, animal husbandry, etc.