What is a 200X Pressure Reducing Valve? The 200X pressure reducing and stabilizing valve consists of a main valve, a pilot valve, a needle valve, a ball valve, a micro filter and a pressure gauge to form a hydraulic control connection system. When a fire breaks out, a large amount of water is urgently needed for firefighting, and domestic water is cut off immediately to ensure sufficient firefighting water; when the pressure of water for firefighting stops decreases, the valve automatically opens and assumes a normally open state to restore domestic water supply. The valve makes the system unnecessary to set up a special separate water supply pipe network for fire protection, which greatly saves the construction cost and water consumption. This product is self-controlled by a pilot valve, does not require other devices and energy sources, is easy to maintain, has high pressure control accuracy, is less affected by inlet pressure and flow, and is reliable in reducing pressure and stabilizing pressure. This series of valves are widely used in high-rise buildings, living areas and other water supply pipe network systems and urban water supply projects. working principle: When water is supplied to the valve from the...
What is a pneumatic ball valve? Classification of the pneumatic ball valves ? Answer: pneumatic ball valve is divided into pneumatic O ball valve, pneumatic GB floating ball valve, pneumatic beauty floating ball valve, pneumatic GB fixed ball valve, pneumatic beauty fixed ball valve, pneumatic clamp V ball valve, pneumatic flange type V ball valve, pneumatic GB flange V ball valve, pneumatic ball valve, pneumatic ball valve, pneumatic three piece ball valve and pneumatic thin ball valve. (That is, the pneumatic ball valve can be divided into national standard and American standard, according to whether the fixed ball valve is divided into floating ball valve and fixed ball valve, according to the connection mode is divided into a pair of clip type, flange type and internal threaded ball valve.) What are the applicable working conditions of the pneumatic ball valve? Answer: Suitable for natural gas, oil, chemical, metallurgy, paper, electric power, mining, printing and dyeing, biopharmaceutical, daily use, chemical industry, food and beverage, water treatment and air treatment and other industries of fluid automatic control or adjustment control, and automatic pneumatic instruments supporting use. Shell (which structure of valve body) can be designed for? Answer: According to the requirements and...
Why is it necessary to install and set up an air vent in a water supply pipe? Air venting valves are essential for pipelines as they are used to quickly remove gas from the pipeline, to improve the efficiency of water conveyance equipment and to protect the pipeline from deformation and rupture. It is installed at the outlet of the pump or in the water distribution line to remove a large amount of air from the pipe to improve the efficiency of the water pipe and pumping machine, and in case of negative pressure in the pipe, the valve can quickly suck in air to keep the line damaged by negative pressure. When the pump stops working, negative pressure will be generated at any time and the float will drop at any time to ensure the safety of the pipeline by sucking in a large amount of air. When the air is discharged, the float pulls down one end of the lever due to gravity, when the lever is in a tilted state, a gap appears in the contact part of the lever and the air discharge hole. The air is discharged through this gap by the...
What are the common valve packing? Some common types of valve packing and the role of the introduction of. 一， Compression packing (1) Plant fiber packing Made of hemp or cotton impregnated with oil, wax or other impermeable materials, used in low pressure valves below 100℃. Suitable for water, ammonia and other media. (2)Asbestos fiber packing Asbestos fiber has good heat resistance, can resist weak acid, strong alkali, high strength, good adsorption performance and other advantages. (3)Rubber packing There are rubber sandwich cloth, rubber rods, ring rubber packing, used in ammonia, concentrated sulfuric acid and other media at a temperature of ≤ 140 ℃. (4) Carbon fibre packing Carbon fiber packing is made of carbon fiber woven rope impregnated with PTFE emulsion. Carbon fiber packing has excellent elasticity; excellent self-wetting, high-temperature resistance characteristics, in the air can work stably in the temperature range of -120 ~ 350 ℃, pressure resistance ≤ 35MPa. (5) Flexible graphite packing Flexible graphite packing in the valve is more widely used, has the following excellent performance. ①Unique flexibility and resilience, the production of notched packing can be freely bent along the axial axis more than 90 °, the use of temperature and pressure changes, vibration and...
What is a flange adapter? Flange adapters are also called large-scale flexible connections with pipe connection fittings. Its effect is almost the same as the effect of removable joints, but they are different. Difference 1: raw materials Flange adapters are mostly cast iron raw materials. The main raw materials of detachable joints are carbon steel, stainless steel, etc. Difference 2:Names. The flange adapter is also called a wide-scale flexible joint, and the detachable joint is also called a double flange power transmission joint. The models are B2F type, CC2F type, etc. Difference 3: Applications The flange adapter transmits the pressure thrust (blind plate force) of the connected parts and compensates the pipeline error, reducing the damage to the pipeline and pipeline equipment caused by the axial thrust. It mainly connected with the pumps, valves, pipelines and so on. Different 4: appearance: It looks like they are all connected in series with screws, but at a glance you can tell that there is no flange on the flange adapter, and detachable joint has flanges in it. In addition, their connection methods are also different. The flange adapter has a threaded structure, while the detachable joint is connected to the pipeline through the flange.
The difference between bellow seal globe valve and ordinary globe valve Features of bellow seal globe valve: Bellows globe valve is also called bellows seal globe valve, through automatic seam welding, a metal barrier is formed between the fluid medium and the atmosphere to ensure the design of zero leakage of the valve stem. Compared with traditional globe valves, it has the following advantages: Double sealing design (bellows + packing) If the bellows fails, the valve stem packing will also be avoided; the sturdy and durable bellows seal design ensures zero leakage of the valve stem and provides maintenance-free conditions. Reasonable structure, reliable sealing, excellent performance and beautiful appearance. There is no fluid loss, reducing energy loss and improving plant equipment safety. The sealing surface is surfacing with Co-based cemented carbide, which has good wear resistance, corrosion resistance, good anti-friction performance, long service life, reduces maintenance times and reduces operating costs. The sturdy and durable bellows seal design ensures zero leakage of the valve stem and provides maintenance-free conditions. The bellows globe valve stem is quenched and tempered and surface nitrided, which has good anti-corrosion and anti-friction performance; The characteristics of ordinary sealing globe valve introduction: Globe valve is also called...
How to install the pressure reducing valve correctly? The main points of installing the pressure reducing valve (1) The installation of the pressure reducing valve should be carried out after the pressure test and flushing of the water supply pipe network are qualified, and the pressure test and flushing records of the pipeline should be checked. (2) Before installing the pressure reducing valve, it should be checked that its specifications and models should be consistent with the design, the control pipeline outside the valve and the connecting parts of the pilot valve should not be loose, the appearance should be free from mechanical damage, and foreign matter in the valve should be removed. (3) For the convenience of operation and maintenance, the pressure reducing valve is generally installed upright on the horizontal pipeline. The proportional pressure reducing valve should be installed vertically. When installed horizontally, the orifice of the single breathing hole pressure reducing valve should be downward, and the orifice of the double breathing hole pressure reducing valve should be in a horizontal position; the adjustable pressure reducing valve should be installed horizontally. The cover should be up. (4) The pressure reducing valve must be installed in...
There are many types of globe valves, and there are many ways to classify them. According to the sealing material, globe valves can be divided into two categories: soft seal globe valves and metal hard seal globe valves; according to the structural form of the valve flap can be divided into two categories: balanced globe valves and non-balanced globe valves; according to the form of the flow channel can be divided into DC channel, Z-shaped flow channel, annular flow channel, DC flow channel and three-way flow channel, etc. 1. Soft seal globe valve In the globe valve, in order to prevent the soft seal from heat damage, a heat sink is installed in front of the soft seal, which is composed of a metal sheet with a large heat sink surface. This design is not sufficient to prevent the soft seal from catching fire and burning if used in oxygen service and to prevent failure of this type of valve it is necessary to enlarge the inlet passage beyond the seat so that a pocket is formed at one end of the inlet passage so that the high-temperature gas collects away from the seal. When designing soft sealing surfaces,...
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