The manual blind valve is easy to operate in practice. Most of the underground pipeline gate valves are market competitions with low human resources opening and closing costs. The lack of visibility and many other unfavorable conditions have made such a huge gate valve sales market still not real. In the sense. Worm gear butterfly valves should be very low. The worm gear pair disc valve adopts the lever action of the transmission gear. The drive gear on the butterfly valve rotates the drive lever to turn the pressure regulating valve disc on and off. The structure of the worm gear butterfly valve is more effective and reliable, and the opening and closing is more labor-saving. timely. For some large-diameter gate valves, this is a very good choice, but the on-off valve must be long-term. The price is higher than that of manual butterfly valves, and lower than that of electric ball valves or pneumatic butterfly valves. Dry knowledge, the big difference between the butterfly valve and the gate valve is that the opening and closing prefabricated component of the butterfly valve is a plate, and the gate valve is a ball. The gate valve evolved from the plug valve. It has the same degree of air resistance, because the output power of the thermal steam trap is derived from the steam electric desalination. The oil in the wastewater is all emulsified oil with strong surface activity, and the cyclone is physical and pedal Therefore, the concentration of waste water and oil must be within the scope of the design scheme, so that the cyclone separation equipment can be guaranteed.

Manual blind valve except that the plug body is a round ball with a ring-shaped buried hole or crossing its centerline. The ratio of the spherical surface to the opening of the safety channel should be such that when the ball rotates, the spherical surface should be completely stored in the channels and entrances to block fluidity. The gate valve can be shut off inseparably with only a degree of rotation and a small rotation torque. The completely identical valve kidney tube presents a small, direct flow relative path for the substance. The gate valve is generally considered to be suitable for opening and closing, but the recent development trend has already designed the gate valve to control the total flow and manipulate the total flow. The main features of the gate valve are compact structure, convenient actual operation and maintenance, and can be used for water, organic solvents, acids, gas and other general working substances, and also suitable for extreme working conditions such as co2, hydrogen peroxide, and methane gas. Crude oil and butadiene.

Gate valve is a new type of gate valve that has been widely used in recent years. It has the following advantages. The frictional resistance of fluid mechanics is small, and its resistance coefficient is equivalent to the length of the pipeline of the same length. The upper port number can be quickly turned off to repair the working pressure of the pipeline. Actual operation, while the second method of dosing is due to the relative dispersion of the total coagulant usage, and it is not possible to obtain a method of dosing, so it does not increase the cost of heavy media. Under the prerequisite conditions, the second investment method is not ideal.

The manual blind valve has simple structure, small size and light weight. The structure is compact and reliable. At this stage, the raw material of the raised surface of the gate valve is generally made of plastic, which has good sealing characteristics. It is also commonly used in ultrafiltration devices. , The actual operation is convenient, fast opening and closing, full opening and full closing ° rotation, which is conducive to remote operation. Convenient maintenance, simple structure of the ball valve, general movable seal ring, convenient disassembly and replacement.

When completely opened or completely closed, the sealing surface of the ball and high pressure gate valve is isolated from the medium, and the material is not easy to cause the erosion of the valve sealing surface.

has a wide range of applications, from small to millimeters, up to several meters, from high vacuum pumps to high vacuum pumps that can apply pressure. The temperature control valve refers to the temperature adjustment installed on the water supply pipe of the heat pipe radiator, which is actually a kind of equipment for adjusting the total flow.

gate valve has been widely used in crude oil, chemical plants, power generation, paper industry, nuclear power, airlines, rockets and other units, and everyone's daily life.

Gate valve can be divided according to the structure,

一, float switch

The ball of the gate valve fluctuates. Under the effect of high pressure, the ball can cause a certain deviation and press on the protruding surface of the entrance and exit to ensure the sealing performance of the entrance and exit. The float switch has a simple structure and good sealing characteristics, but the load of the ball that bears the substance in the work is transmitted to the entrance and exit seal ring, so it must be considered whether the raw material of the seal ring can bear the load in the work. Spherical substance. This structure is commonly used for mid-bottom pressure gate valves.

二, fixed ball valve

The ball of the gate valve is fixed and does not move easily after being pressed. The introduction of excellent automated machinery can complete the separation of chemical substances in various conditions such as solid and solid in water, liquid and liquid and the concentration of positive ions in the substance. The manual blind valve fixed ball valve has a fluctuating high pressure gate valve. After the high pressure, the high pressure gate valve moves to make the sealing ring press on the ball to ensure the tightness. Generally installed on the left and right shafts of the ball, the actual operating torque is small, suitable for high pressure and large diameter gate valves. In order to reduce the actual operating torque of the gate valve and improve the credibility of the sealing performance, in recent years, a skeleton sealed gate valve has appeared, which introduces a unique grease in the middle of the raised surface to generate floating oil and improve the sealing performance. Features and reduce actual operating torque. It is more suitable for high pressure and large diameter gate valves.

三, malleable gate valve

The ball of the gate valve is malleable. Both the ball and the seat ring are made of metal composite materials, and the tightness of the working pressure is very high. The working pressure of the substance itself cannot be considered for the tightness regulations, and the external force must be released. The valve is suitable for high temperature and high pressure materials. The malleable ball is made by opening a malleable groove below the inner cavity of the ball to obtain malleability. When the safety channel is closed, the wedge of the valve seat is used to open the ball and press against the high-pressure gate valve to develop sealing. Before the ball rotates, loosen the taper head and restore the ball to its original shape, thereby creating a small gap between the ball and the high-pressure gate valve, which can reduce the friction of the sealing surface and the actual operation of the torque gate valve can be based on the safe passage The parts are divided into direct type, three-way type and bevel type. The latter two gate valves are used to dispense substances and change the orientation of the substances.

The gate valve indicates the category, and the product manual is suitable for flange-end electric (or pneumatic ball valves. Flotation agents can be divided into collectors, foaming agents and regulators according to their different functions. In order to improve the product work as much as possible Equipment speed and processing accuracy