Introduction to hydraulic butterfly valves, how does hydraulic butterfly valves work?

Its pressure-holding and locking hydraulic butterfly valves are opened by hydraulic drive and closed by heavy hammer potential energy. After the valve is installed, it can replace the gate valve (butterfly valve) and check valve, and the flow resistance coefficient is small. When closing the valve, it is divided into two stages, the front section is fast closing, the rear section is slow closing, and the fast and slow closing time and angle can be adjusted according to the needs of users.

The locking type has dual protection of automatic packing and locking pin locking. The accumulator hydraulically controlled butterfly valve is opened by the water pump and closed by the accumulator. Due to the use of the accumulator shut-off valve, the heavy hammer is eliminated, so it occupies a small space, is easy to install and has a compact structure.

The electrical control can be controlled according to the needs of users, ordinary control and PLC control can be adopted, and the pump and valve linkage can be realized, and local remote control and computer joint control can be realized.

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only: Suzhou Neway Valve Co., Ltd., Shanghai Guanlong Valve Machinery, Shanghai Qizhong Valve Manufacturing, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

A hydraulic valve manifold is a combination of hydraulic valves that use two or three hydraulic valves together. If a check valve is combined with a relief valve, it is often referred to as a "balance valve" or "support valve" or "back pressure valve". As long as you understand the working principle of each single valve, you can understand that there are many combinations after the combination, and you can't list them one by one.

This is a basic knowledge question: 1) Industrial (also known as fixed equipment, as opposed to mobile machinery) directional valves are generally 4-way type, that is, there are 4 main oil ports: pressure oil inlet P, load oil port A, B, and return port T to the oil tank.

Other control ports, load pressure LS ports, oil leakage ports, etc. It cannot be counted in several ports. 2) All components that need pilot control oil to control the main stage, such as electro-hydraulic reversing valves, have the problem of how to deal with the pilot oil** and return oil.

This is a reflection of the flexibility of hydraulic technology, allowing the user to choose according to the actual needs of the system. Here: X-control oil is directed directly back to the tank port (called external return (leakage) if it is returned to port T, and l- oil leakage from the valve is separately led back to the tank port 3).

By the way, the treatment of the pilot control oil can be controlled externally and returned internally; internal control, external returns; Internal control, internal control. 4) By the way, the oil leaking from the L port and the pilot oil returning from the outside must be directed back to the tank (or through the filter) and must never be collected to the main return port and led back to the tank together. This situation is more sensitive in proportional and servo systems.

The valve hydraulics are mounted on the valve drive shaft. The drive spline is fixed with a key on the drive shaft of the valve, and the crank (with an external spline) is empty on the drive shaft. When the hydraulic system is working normally, the transmission spline is connected to the crank through the gear sleeve.

In this way, the hydraulic cylinder drives the crank, and the spline on the crank uses the gear sleeve to transmit the torque to the transmission spline. Because the transmission spline is fixed on the driving shaft, the driving shaft rotates and drives the valve butterfly plate to open and close. I'm sorry, ** can't be transmitted.

Butterfly valve is a simple structure of the control valve, the valve can be used to control the inflow and outflow of air, water, or various corrosive substances and other fluids, the switch of the butterfly valve is a disc-shaped disc plate, in the valve body around its own shaft rotation, in order to achieve the purpose of opening and closing the valve. The manual butterfly valve is operated by manual control to achieve the effect of opening and closing, and the manual butterfly valve is often used in the food, medicine, water supply and drainage industries with a temperature of 120° and engineering pressure. 

Introduction of manual butterfly valve

The manual butterfly valve has a simple structure, mainly composed of simple components such as valve body, valve stem, disc plate, etc., because it has a light structure and low cost, and only needs to rotate 90 ° when using it, it can complete the opening and closing of the letter manuscript, the operation is simple, and it has good fluid control characteristics, when the manual butterfly valve is fully opened, the thickness of the disc plate is the only resistance when the fluid flows through the valve body, and the pressure generated by the valve through the valve body is very small, so the opening and closing of the valve is well controlled. Manual butterfly valves are available in two types of valve sealing. One is the elastic sealing valve, and the sealing ring is generally embedded around the valve body or disc plate.

The other is the metal seal valve, the metal seal valve has good characteristics to adapt to high temperature, and the elastic seal valve can not be done at this point, so the service life is generally longer than the elastic seal valve.

Manual butterfly valve features:

The main features of the manual butterfly valve are:

The design is novel, the structure is unique, the weight is light, and it can be opened and closed quickly.

The operating torque is small, the operation is convenient, flexible and labor-saving.

It can be installed in any position and is easy to maintain.

The sealing material is corrosion-resistant, durable, and the seals can be replaced frequently to achieve zero leakage.

Manual butterfly valve structure

The manual butterfly valve has a three-way eccentric design, which can ensure that there is no friction between the sealing surfaces and increase the service life;

Its poor torque has the characteristics of elastic sealing;

The clever design of the wedge allows the valve to have the function of automatic sealing as it closes tighter and tighter, so as to achieve the purpose of zero leakage;

The structure is diversified: butt clamp manual butterfly valve, flange manual butterfly valve, butt welded manual butterfly valve;

It can also install electric, vaporization and other devices according to the needs of customers;

The structure is simple, easy to install and easy to maintain.

The emergence of the manual butterfly valve is convenient for everyone, but the only drawback is that it must be used in a relatively small temperature and pressure range, and generally shows good sealing at low pressure, so when choosing, it is necessary to understand whether the product is suitable or not, so as not to waste resources and money.

You can get it for free

1) Open the valve: When the hydraulic butterfly valve is opened, the hydraulic control station and the lifting cylinder are used to drive the disc plate to rotate 90° through the lifting arm, hammer rod, valve shaft and other parts. At the same time, the force of the hydraulic control station and the lifting cylinder also lifts the hammer vertically through the lifting arm and the hammer rod, converting the gravity of the hammer into potential energy and preparing the power for closing the valve.

2) Locking: The locking mechanism of the hydraulic butterfly valve is composed of transmission cylinder, mechanical locking shaft, electromagnetic locking shaft, electromagnet and other parts, with mechanical electromagnetic joint locking function, when the valve is fully opened, the force of the transmission cylinder drives the mechanical locking shaft to be put into the locking position for initial locking, and then the electromagnetic force of the electromagnet drives the electromagnetic locking shaft to carry out the final lock, and the locking process is completely automatic under the action of a series of travel switches, all in one go. The huge force of the hammer is completely affected by the mechanical locking bearing, the exit of the mechanical locking shaft is constrained by the electromagnetic locking shaft, and the exit of the electromagnetic locking shaft is controlled by the electromagnetic force of the electromagnet, as long as the electromagnet does not lose power, the electromagnetic locking shaft and the mechanical locking shaft are firmly controlled, do not close the valve for how long, no matter how heavy the hammer is, the hammer (disc plate) will never fall the slightest, to ensure that the disc plate is always in a fully open state (minimum flow resistance state) after opening, during which there is no need for any oil replenishment, pressure replenishment measures.

3) Closing the valve: There are three situations of closing the valve, a: artificially closing the valve; b：

The pump or valve itself fails to close the valve due to power loss; C: External line power loss shut-off valve. In either case, the valve is closed, and the electromagnet can be automatically closed according to the predetermined program as long as the electromagnet loses power, and the electromagnetic force disappears synchronously at the moment of the electromagnet loss.

Once the electromagnetic locking shaft loses the effect of electromagnetic force, it is unlocked immediately, and the mechanical locking shaft can also be unlocked after losing the constraint of the electromagnetic locking shaft, and the potential energy of the hammer is the hammer rod, the lifting arm, the valve shaft and other parts drive the disc plate to close the movement according to the pre-set fast closing, buffering, slow closing procedures, and the whole process is completed in one go. In the process of closing the hydraulic butterfly valve, the oil in the lower cavity of the lifting cylinder must be excluded, and accordingly, the method of controlling and adjusting the oil discharge speed of the lifting cylinder is adopted, and the closing speed of the valve can be effectively controlled. The closing process of the hydraulic butterfly valve has three procedures: fast closing, buffering and slow closing, and its fast closing time, slow closing time, fast closing angle and slow closing angle can be adjusted.

Recognize butterfly valves from the following parts:

1. a valve body. 2. a valve seat.

3. a valve plate. <>

Manual centerline butterfly valve.

I hope to answer the Liwei to help you blind!

Butterfly valve, also known as flap valve, is a simple structure of the regulating valve, which can be used for the on-off control of low-pressure pipeline medium butterfly valve refers to the shut-off part (disc or butterfly plate) as a disc, rotating around the valve shaft to achieve opening and closing of a kind of valve, the valve 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. It mainly plays the role of cutting and throttling on the pipeline. The butterfly valve opening and closing part is a disc-shaped butterfly plate, which rotates around its own axis in the valve body, so as to achieve the purpose of opening and closing or adjusting.