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Use and maintenance of Ball Valve
The purpose of use and maintenance is to extend the life of the Ball Valve and ensure reliable opening and closing. The valve stem thread often rubs against the valve stem nut, and needs to be coated with yellow dry oil, molybdenum disulfide or graphite powder for lubrication. For Ball Valve that are not f
Installation requirements for Throttle Valve
(1) For boilers with a rated evaporation capacity greater than 0.5t/h, at least two Throttle Valve shall be installed; for boilers with a rated evaporation capacity less than or equal to 0.5t/h, at least one Universal Valve shall be installed. Throttle Valve must be installed at the outlet of the split economizer and the outlet of the steam superheater.
Analysis of the cause of leakage on the valve body joint surface of the Globe Valve
The Globe Valve consists of a main valve, a pilot valve, a relief valve, a joint and a conduit. It is a Universal Valve that relies on the discharge of the medium from the pilot valve to drive or control the main valve. The Globe Valve is an important accessory of the boiler, and is commonly installed on high-pressure power station boilers. Before inst
Maintenance of Globe Valve during grease injection
When grease injection of Globe Valve, the problem of how much grease to inject is often ignored. After the grease gun is refueled, the operator selects the Globe Valve and the grease injection connection method, and then performs the grease injection operation. There are two situations: on the one hand, the small amount of grease injection leads to insufficient grease injection, and the sealing surface wears faster due to lack of lubricant. On the other hand, excessive grease injection causes waste. It is because the sealing capacity of different Universal Valve is not accurately calculat
The working principle and importance of the Globe Valve for subway
The Globe Valve for subway is a device used to protect the safety of the pressure system. Its main function is to release the pressure to prevent the system from overloading or exploding when the pressure exceeds a certain set value. In the subway system, the Globe Valve is usually installed in key locations, such as train carriages, vehicles, track systems, etc., to ensure the safe operation of the system. The working principle is based on the pressure control principle. When the pressure inside the subway system exceeds the set value, the Globe Valve will automatically open and release
Operation and use of Globe Valve installation
1) Remove the protective covers on both sides of the flange end and flush and clean the Globe Valve when it is fully open. 2) Before installation, the whole machine should be tested according to the specified signal (electric or gas) (to prevent vibration caused by transportation from affecting the performance), and it can be installed online onl
The actual role and advantages of Gate Valve
Gate Valve are mainly used in pipelines to cut off quickly, distribute and change the flow direction of the medium. Gate Valve are a new type of valve that has been widely used in recent years. It has the following advantages: 1. The fluid resistance is small, and its resistance coefficient is equal to
Basic performance of Gate Valve
(1) Pressure regulation range: It refers to the adjustable range of the Universal Valve output pressure P2, within which the specified accuracy is required. The pressure regulation range is mainly related to the stiffness of the pressure regulating spring. (2) Pressure characteristics: It refers to the characteristics of the output pressure fluctuation
Product features of Gate Valve
1. The Gate Valve adopts flange bolt connection, and the two ends of the branch pipe are flange connection structures. 2. The sealing surface of the Gate Valve seat is made of iron-based chromium-nickel stainless steel surfacing, which has good wear resistance and abrasion resistance. 3. The surface of the Gate Valve stem is tr
Maintenance and care of Gate Valve
Universal Valve are automatic valves. Their function is to prevent the backflow of media in the pipeline. They are mainly used in pipelines with unidirectional flow of media. They only allow the media to flow in one direction to prevent accidents. (1) The opening and closing parts should be in the closed position dur
The Gate Valve moves back and forth rapidly and abnormally
(1) Discharge pressure. The inlet pressure when the Gate Valve reaches the specified opening height. The upper limit of the discharge pressure must comply with the requirements of relevant national standards or specifications.
Installation and maintenance of Gate Valve
1. Universal Valve only allow the medium to flow in one direction, and there is a directionality when installing. Its structural length is greater than that of Universal Valve, and the fluid resistance is large. When it is in long-term operation, the sealing reliability is not strong. 2. When the Gate Valve is opened, when the opening height of the valve dis
Application conditions and operation of Gate Valve
A Gate Valve is a valve whose closing part (gate) moves in the vertical direction along the center line of the passage. Universal Valve can only be used for full opening and full closing in pipelines, and cannot be used for adjustment and throttling. Universal Valve are a kind of valve with a wide range of applications. Generally, it is used for cutting devices with a diameter of DN ≥ 50 mm, and sometimes Universal Valve are also used for cutting devices with very small diameters.
The main role of the Gate Valve in the expansion tank of the drain pipe
The expansion tank of the drain pipe is a boiler water treatment equipment that realizes the continuous drainage of the steam drum, separates the steam and water, and recovers heat. Common drainage methods mainly include steam-liquid two-phase flow traps, Universal Valve traps, float traps, and drainage methods using small pipe diameters. When the quality and amount of sewage discharged from the power plant are not fixed, the purpose of reducing the amount of wastewater discharged and the amount of steam discharged from the expansion tank can be achieved by adding a Universal Valve for co
Applications and structural features of Gate Valve
The Gate Valve uses a ball with a circular through hole as the opening and closing part. The ball rotates with the valve stem to achieve the opening and closing action. The Gate Valve evolved from the plug valve, also known as the spherical plug valve. The opening and closing part of the Gate Valve is a sphere, which is used to rotate 90 degrees around the axis of the valve stem to achieve the purpose of opening and closing.
Development History of Gate Valve
The development of Gate Valve has a history of seventy or eighty years since the beginning of the 20th century. Ten major categories of Gate Valve products, self-operated valves and positioners have been produced successively. The development history is as follows: The original Gate Valve for stable pressure came out. The double-seat valve and single-seat valve with
Performance and function of Special Material Valve
I. Performance of Special Material Valve (1) Pressure regulation range It refers to the adjustable range of the output pressure P2 of the Special Material Valve, within which the specified accuracy is required. The pressure regulation range is mainly related to the stiffness of the pressure regulating spring. (2) Pressure characteristics It refers to the characteristics of the output
Installation method of Special Material Valve
I. Preparation before installation ① The pipelines before and after the Special Material Valve are ready. The front and rear pipelines should be coaxial, and the two flange sealing surfaces should be parallel. The pipeline should be able to bear the weight of the Special Material Valve, otherwise the pipeline must be equipped with appropriate support. ② Blow cl
Technical questions about Slurry Valve
We have summarized a series of questions that Nogan customers have about the use of Slurry Valve products, and our engineers have made the following answers. In addition, it is recommended that customers consult engineers or customer service personnel before selecting a model. Because selection is more important than calculation, and selection is much more important and complicated than calculation. Because calcula
Applicable occasions for Wear-resistant Ball Valve
1. Boiler (or chiller) water flow balance In a boiler room (or chiller room), several units are generally installed in parallel. Due to the different resistances between the units, the flow through each unit is inconsistent, so that the unit cannot exert the maximum output of the installed capacity. At this time, an Wear-resistant Ball Valve should be installed at each boiler (or chiller) so that each unit can obtain the designed flow and ensure the safe and normal operation of each unit. When the chiller is connected to multiple cooling towers, each cooling tower should also be i
Installation requirements for different Wear-resistant Ball Valve
The following matters should be noted when installing socket-welded forged steel Wear-resistant Ball Valve: 1. Do not allow the Wear-resistant Ball Valve to bear weight in the pipeline. Large Wear-resistant Ball Valve should be supported independently so that they are not affected by the pressure generated by the pipeline system. 2. During installation, pay att
Installation test and adjustment of Lifting Stem Ball Valve/track Ball Valve
Before installing the Lifting Stem Ball Valve/track Ball Valve, confirm whether the product performance and the medium flow direction arrow are consistent with the motion conditions, and clean the inside of the valve. Impurities are not allowed on the sealing ring and the ball plate. The ball plate is not allowed to be closed before cleaning to avoid damaging the sealing ring. The flange for installing the Lifting Stem Ball Valve/track Ball Valve should use a special flange for butterfly valves. The best position for installation in the pipeline is vertical installation, but it cannot be
Design Analysis of Lifting Stem Ball Valve/track Ball Valve
The valve body of a Special Valve is the main pressure-bearing part of the valve and houses the closing element. The flow passage in the Special Valve is designed to have a smooth arc inner wall without sharp corners and sharp edges, which can provide a smooth process flow without abnormal turbulence and noise. The flow passage itself must have a constant area to avoid any additional pressure loss and excessive flow rate. Special Valve have wide end connections, so the valve body can be adapted to almost every end connection, although its face-to-face dimension is too long to accommodate
Working principle of High Pressure Hydrogenation Valve
1. When the High Pressure Hydrogenation Valve is connected to the circuit and the system gas source, the air enters the A cylinder (B cylinder) through the pipe A or B pipe to push the piston to one end, thereby driving the rotating shaft and the ball core to rotate 90°. 2. The top of the High Pressure Hydrogenation Valve is linked to the visual device. When the green mark
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