How the Reducing Valve Works？

Pressure reducing valve is widely used in fire water supply and automatic sprinkler system.Today Alloy valve manufacturer would like to share the working principle and setting requirements of pressure reducing valve. First, how it works? 1. Pilot pressure reducing valve Pilot operated relief valve by changing the throttling area, let the kinetic energy of the flow velocity and fluid in the pipeline system changes, different levels of pressure losses, achieve the purpose of pipeline internal pressure relief, through careful control and adjustment, to make the valve internal pressure fluctuations and the spring force reached a balance, eventually make the valve after pressure in the pipeline to keep a constant within a certain error range. The pilot pressure reducing valve USES the hydraulic pressure principle to realize the control. Pilot pressure reducing valve as a local pressure change adjustment and throttling components, by adjusting the inlet pressure, it will be reduced to a certain set of outlet pressure range, and then rely on the energy of the medium itself, so that the outlet pressure automatically maintain a stable valve. 2. Proportional pressure reducing valve Proportional pressure reducing valve is a numerical ratio to control the pressure valve after the valve, valve pressure before and valve pressure ratio of 2:1,3:1, etc. The pressure behind the valve changes with the pressure in front of the valve. The pressure behind the valve is not constant, but keeps a certain ratio with the pressure in front of the valve. When the pressure in front of the valve increases, the pressure behind the valve increases proportionally, when the pressure in front of the valve decreases, the pressure behind the valve decreases proportionally, keeping the pressure ratio of the valve inlet and outlet unchanged. That's all for the sharing,and we supply special alloy valve for sale, if you have any demand for our products,just feel free to contact us.

How to Differ from Floating Ball Valve and Trunnion Ball Valve

1. Appearance The appearance is different. Trunnion ball valve body with a fixed shaft on the bottom. And if the ball valve body has a device for injecting grease, it is basically a trunnion.However, can we say it must be a floating ball valve if it is without injecting device? Of course not, small size (such as 2", 150LB) trunnion ball valves are usually not filled with injecting device either. 2. Sealing face As the ball is floating, under the pressure of the medium, the floating ball will move and against the downstream sealing face, so the seal of the floating ball valve belongs to the one-way seal. The sealing of the floating ball valve is realized by the pressure of the medium. The floating ball will be pressed against the sealing face under the action of pressrue to realize sealing, when it is closed. The ball of the trunnion ball valve cannot be moved, so the both sides of the trunnion ball valve must be sealed. The ball don’t produce displacement when the trunnion ball valve is closed. It depend on the moving of floating seats, and press against the ball under the action of the media pressure to realize sealing. Since the sealing principle is different, the requirements of the two ball valve are different on the sealing face material, especially the floating ball valve must be able to bear the pressure caused by the floating ball. 3. Characteristics Usually, China Monel Ball Valve Supplier the service life of trunnion ball valve is longer than floating ball valve. And it can release pressure automatically without a relief, when the medium temperature in the valve rises and causes abnormal pressure rise. This is very important to ensure the safety of industrial production. Floating ball valve has smaller size and easier to operate. 4. Application The floating ball valve is suitable for medium and low pressure and usually has a small diameter.And the working temperature usually from -29℃ to 425℃. The trunnion ball valve can be used in high pressure conditions and the size can be up to 60 inches.It is a kind of double-block-and-bleed (DBB) valve. It can block both upstream and downstream media. And when the pressure in the middle cavity is greater than the seat spring force, the seat will be pushed open to release the pressure inside the chamber to ensure safety.

What is a Soft Seal Gate Valve

Alloy valve manufacturer shares that soft seal gate valve is a kind of most commonly used water supply valve with small fluid resistance and strong sealing performance. Application of soft-seal gate valve: Soft-sealing gate valve main use is the water supply system, warm water, cold water system, the general requirements temperature less than 80 °; Advantages of soft seal gate valve: 1 delicate appearance, light weight: the valve body is made of ball black cast iron, the weight is about 20%~30% less than the traditional gate valve weight, transportation, installation and maintenance is convenient; 2. Rubber binding of the gate: the gate is integrated with high-quality rubber for internal and external binding. Rubber vulcanization technology ensures accurate geometric size of the gate after vulcanization. 3 channels without groove design: channel without groove design structure, sediment, iron filings, sundries, etc. will not be deposited in the valve bottom groove, sealing life is long.

How to Solve the Problem of Valve Leakage

Regulator is the main type of actuator, by receiving the control signal of the control unit output, with the help of dynamic operation to change the fluid flow. Control valves are generally composed of actuators and valves. If according to the power of the actuator, the control valve can be divided into pneumatic, electric, hydraulic three. Below Alloy valve manufacturer will talk about the control valve several common failures and solutions. In the modern factory automation control system, the control valve, as the terminal actuator of the automatic regulation system, receives the control signal to realize the regulation of the chemical process. Its motion sensitivity is directly related to the quality of the regulating system. According to the field actual statistics about 70% of the fault from the control valve. Therefore in the daily maintenance summarizes and analyzes the influence control valve safe operation factor and its countermeasure. The following several common leakage fault phenomenon analysis, put forward countermeasures. Leaks in the valve: Stem length discomfort. Air valve, stem too long stem up (or down) the distance is not enough, resulting in a gap between the spool and the seat, can not fully contact, resulting in lax closure and internal leakage. Similarly, the valve stem of the air closing valve is too short, resulting in a gap between the valve core and the valve seat, which cannot be fully contacted, resulting in loose closing and internal leakage. Solutions: Special alloy valve Supplier China shares that the control valve stem should be shortened (or extended) to fit the length of the control valve so that it no longer leaks.

How Do Cryogenic Valves Work

New Energy Valve Manufacturer shares that a cryogenic valve means that the valve can be used in low temperature conditions, usually the valve will be considered a cryogenic valve when the operating temperature will be below -40 degrees c. The cryogenic valve is usually used in oil and gas, air separation, natural gas industry, etc. if it can work Quality determines safety, economy, and continuity. With the development of modern technology, the demand for cryogenic valves is increasing, and the scope of use is also growing. For temperatures below minus 50 degrees, do not use extended valve stems. For temperatures below minus 50 degrees, the length of the stem depends on the specific temperature. The cryogenic valve is mainly used to transport low-temperature medium such as ethylene, liquid oxygen and liquid hydrogen, liquefied natural gas, liquefied petroleum oil, etc., which is not only easy to explode and flammable, but also becomes a gas when the temperature is vaporized, the volume will expand hundreds of times. Times. The low temperature valve material is very important. If it is not correct, it will cause leakage inside and outside the valve body casing and sealing surface. The comprehensive mechanical capacity, strength and hardness of the parts will be unqualified, which will cause breakage. If the LNG leaks, it will explode. Therefore, materials are the main problem in the design and manufacture of LNG valves. The body and bonnet consist of LCB (-46 Deg C), LC3 (-101 Deg C), CF8 (SS304) (-196 Deg C). We are the New Energy Valve Manufacturer,welcome to purchase our Special Material Valves.

How To Desalinate Seawater

The seawater desalination equipment converts seawater into fresh water to provide a standard water source for life, industry, etc. The reverse osmosis desalination desalination process does not need to warm the seawater, operates at normal temperature, consumes less energy, and has low water production cost. How is desalination carried out? Seawater pretreatment: Whether it is desalination or desalinization of brackish water, feedwater pretreatment is the key to ensuring long-term stable operation of the reverse osmosis system. Adequate consideration should be given to the development of seawater pretreatment programmes: the presence of large amounts of microorganisms, bacteria and algae in seawater. The growth of bacteria, algae and microbial growth in seawater not only causes many troubles for water intake facilities, but also directly affects the normal operation of desalination equipment and process pipelines. Periodically rising tides, low tides, and a large amount of sediment in the seawater, the turbidity changes greatly, which is easy to cause unstable operation of the seawater pretreatment system. The seawater is highly corrosive. The materials of the equipment, Desalination Valves and pipelines used in the system must be screened and the corrosion resistance should be good. Seawater sterilization and algae removal: Foreign seawater desalination projects use chlorine, NaClO and CuSO4 to kill algae. Considering the various factors such as transportation, it is difficult to add chemical reagents to kill algae. In the process of developing the equipment, seawater sodium hypochlorite generator is specially used. After the seawater pump is taken, a small amount of pressurized seawater is separated and enters the sodium hypochlorite generator to generate NaClO under the action of a DC electric field. The difference is directly injected into the beach sinkhole to kill bacteria, algae and microorganisms in the seawater. Due to the high hardness of seawater, the direct electrolysis of seawater to produce N aC lO must overcome the problem of electrode fouling. In the development process, the electrodialysis frequent reverse polarity (EDR) technology was used, that is, the electrode polarity was reversed every 5-10 m, which effectively solved the problem of scale precipitation of sodium hypochlorite generator. Weidouli is a China manufacturer of Desalination Valve. We have a high-tech work shop. We have a complete quality management system. Choose Alloy Valve Manufacturer, you can be get most careful and thoughtful service!

Where And How Are Globe Valves Used

If you need some alloy valves,maybe you need us,we are the Alloy Valve Manufacturer. Globe valves are utilized to control the flow of liquid at a pipeline. They may be utilized to stop fluid flow altogether, slow it down or permit the fluid to flow freely. Globe valves possess a globe-shaped body, a level piece plus a ring the horizontal bit fit to stop the fluid stream. Where's a globe valve employed? The globe valve is used for throttling flow controller. Close off is achieved by transferring the disk against the flow stream instead of around it in the situation using a bent valve. The circulation pattern by means of a globe valve entails changes in management, leading to greater resistance to flow, resulting in high stress fall. Our products ,such as Special Material Valves. If you have demand about our products, welcome to contact us.

When Should We Avoid Using Metal Hard Seal Butterfly Valves

The sealing pair of the Butterfly Valve usually adopts an elastic sealing material such as rubber or plastic and a metal-to-metal sealing pair, and also partially uses a fluorine-lined or ceramic sealing pair. When used as a shut-off valve, the soft seal butterfly valve seal performance is much better than the metal hard seal butterfly valve. Metal hard seal Manual Butterfly Valve, although able to adapt to higher operating temperatures, have a longer service life than soft seals, but metal hard seal butterfly valves are difficult to completely seal, so they are generally used for throttling. In the domestic valve manufacturers, due to the different structural forms of the sealing pair, when the metal hard sealing butterfly valve is used as a shut-off valve, the sealing performance is also different.

Valve Tutorial

How the Reducing Valve Works？
Pressure reducing valve is widely used in fire water supply and automatic sprinkler system.Today Alloy valve manufacturer would like to share the working principle and setting requirements of pressure...
More
How to Differ from Floating Ball Valve and Trunnion Ball Valve
1. AppearanceThe appearance is different. Trunnion ball valve body with a fixed shaft on the bottom. And if the ball valve body has a device for injecting grease, it is basically a trunnion.However, c...
More
What is a Soft Seal Gate Valve
Alloy valve manufacturer shares that soft seal gate valve is a kind of most commonly used water supply valve with small fluid resistance and strong sealing performance.Application of soft-seal gate va...
More
How to Solve the Problem of Valve Leakage
Regulator is the main type of actuator, by receiving the control signal of the control unit output, with the help of dynamic operation to change the fluid flow. Control valves are generally composed o...
More
How Do Cryogenic Valves Work
New Energy Valve Manufacturer shares that a cryogenic valve means that the valve can be used in low temperature conditions, usually the valve will be considered a cryogenic valve when the operating te...
More
Where And How Are Globe Valves Used
If you need some alloy valves,maybe you need us,we are the Alloy Valve Manufacturer.Globe valves are utilized to control the flow of liquid at a pipeline. They may be utilized to stop fluid flow altog...
More
How To Desalinate Seawater
The seawater desalination equipment converts seawater into fresh water to provide a standard water source for life, industry, etc. The reverse osmosis desalination desalination process does not need t...
More
When Should We Avoid Using Metal Hard Seal Butterfly Valves
The sealing pair of the Butterfly Valve usually adopts an elastic sealing material such as rubber or plastic and a metal-to-metal sealing pair, and also partially uses a fluorine-lined or ceramic seal...
More