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How to ensure the protective function of Gate Valve
The safety protection function of Gate Valve has important applications in our daily lives, especially in boilers. It can prevent excessive medium pressure inside the boiler from causing explosions. Moreover, in places where people gather, the occurrence of explosions will cause Very serious consequences, causing unnecessary personal danger and property damage. Only the correct use
Briefly describe the installation points of Gate Valve
For the installation of Gate Valve, the first thing to note is that before installing the Universal Valve, the sealing performance must be tested. If the Universal Valve leaks or the air cushion is damaged, it must be replaced immediately so that everyone can Get the best use out of it. During the installation process, the first premise is that for all components of the Unive
General valve adjustment safety technical operation process
1) Adjustment of opening pressure ① Before the Gate Valve leaves the factory, its opening pressure should be adjusted one by one to the setting value required by the user. If the user proposes a spring working pressure level, the factory adjustment should generally be made according to the lower limit of the pressure level. ② Before installing the Gate Valve on
Common faults and causes of Gate Valve
Gate Valve, most Gate Valve installed on the system will not fail. If problems occur, they are generally caused by a lack of engineering or maintenance experience. Gate Valve products generally include A41H spring slightly opened Gate Valve, A41Y spring slightly opened closed high-pressure Gate Valve, A41Y spring slightly opened closed high-pressure Gate Valve, AH42F spring closed safety return valve, A42Y-1000 full-open ultra-high pressure Gate Valve, LDA/LDWA Japanese standard Gate Valve, 900 German standard Gate Valve, QH40 quick switching Gate Valve, sanitary grade Gate Valve, GA49H
Gate Valve discharge and seat back pressure adjustment
① To adjust the discharge pressure and reseating pressure of the Universal Valve, an action test must be carried out with the Universal Valve reaching the full opening height. Therefore, it can only be carried out on a large-capacity test device or after the Gate Valve is installed on the protected equipment. The adjustment method varies depending on the structure of the Universal Valve.
Understand what is the safe relief capability of a Gate Valve
Gate Valve The discharge capacity of a Gate Valve, that is, the engine, is one of the most important indicators to measure the performance of a Gate Valve. In the "Online Function and Gate Valve and Testing System" patented technology, open valve dynamic displacement measurement issues and related flow mechanisms are studied under the guidance. Main content: Nozzle flow field characteristics and bas
Gate Valve discharge and seat back pressure adjustment
(1) The Gate Valve adjusts the exhaust pressure and back pressure of the valve and must implement a Universal Valve opening test. Therefore, it is only possible after large-capacity testing equipment or the relief valve is installed in a protective device. Different valve adjustment methods. The structure has a valve disc holder and a seat adjustment ring. The second is t
Faults encountered during operation of Gate Valve
1. Gate Valve leakage For equipment operating under pressure, leakage in excess of allowable levels occurs between the Gate Valve and the sealing valve seat. Cause: Dirt between the valve and valve seat sealing surfaces. When using a poppet valve, put the dirt and damage the sealing surface when the wrench is opened. Repair according to grinding or turning grinding method after a certain degree of damage; bend, tilt or tilt stem of lever and fulcrum, spool and valve position. The Gate Valve needs to be reinstalled or replaced because the spring elasticity has decreased or lost ela
Universal Valve operates normally
The Universal Valve is pressed on the valve seat by the spring force of the valve core. The valve is closed and the valve core top is under the steam. During normal operation, the clamping force under the spring is greater than the upward thrust of the steam, and the valve closes. When the steam pressure reaches the Gate Valve, the steam force is greater than the valve, spool, and rotor pump relief valve exhaust spring force. You can adjust the pressure in the relief valve by changing the pressure of the spring by adjusting the valve stem at the top of the screw.
What are the various structural functions of the Universal Valve?
1. Lever hammer type Universal Valve: Lever hammer type Universal Valve. The force of the weight is amplified by the lever and then loaded on the Gate Valve. The magnitude of the load remains unchanged during the opening and closing process of the valve, so the force transmitted from the valve stem is basically unchanged. Its disadvantage is that it is sensitive to vibration and has poor seat return performance. The Universal Valve with this structure can only be used on fixed equipment. The mass of the weight should generally not exceed 60KG to avoid difficulty in operation. The cast ir
Use the resulting suction effect to reduce the pressure above the Universal Valve
Gate Valve, when the pressure in the protected system rises, an additional force is generated on the sensing element, causing the element to move and open a gap in the Gate Valve channel, and the medium is discharged through the gap. The discharge capacity of the Gate Valve and the service life of its parts , related to the dynamic stability of the Gate Valve operation. The vibration of the Universal Valve will reduce the channel cross-sectional area and discharge capacity of the Gate Valve, and the collision of the Universal Valve with the valve seat and the opening height limiter will
Universal Valve adjustment technical operation process
(1) Adjustment of opening pressure ① Before the Gate Valve leaves the factory, its opening pressure should be adjusted one by one to the setting value required by the user. If the user proposes a spring working pressure level, the factory adjustment should generally be made according to the lower limit of the pressure level. ② Before installing the Gate Valve on
Lower limit of Check Valve pressure range
1. The Check Valve is adjusted to set the value to the opening pressure required by the user. If the user has a spring pressure level, the stamping parts factory should base it on the lower limit of the pressure range. 2. When using a Universal Valve installed in front of protected equipment or before installation, you must readjust the installation site to ensure that the constant pressure va
Working pressure effect of Check Valve device
The cause of sudden excessive silo pressure or excessive pump pressure must be addressed immediately. Efficient and reliable equipment pressure Check Valve are a must for silo systems. When the pressure value is within the preset range, the coil spring keeps the cover closed. The three outer Check Valve springs keep the outer ring bonnet closed until the silo pressure is less than the spring force. When t
What should you pay attention to when setting up Check Valve?
The Check Valve is a special valve whose opening and closing parts are in a normally closed state under the action of external force. When the medium pressure in the equipment or pipeline rises above the specified value, it discharges the medium outside the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value. valve. Check Valve are automatic valves that are mainly used in boilers, pressure vessels and pipelines to control pressure not to exceed specified values and play an important role in protecting personal safety and equipment operati
Check Valve structural characteristics and installation requirements
Check Valve are divided according to their structural forms and can be divided into pendulum type, lever type, spring type and pilot type (pulse type); according to the valve body structure, they can be divided into two types: closed type and non-closed type. The closed Universal Valve means that the discharged medium does not leak out and is discharged along the outlet to the designated location. It is generally used in toxic and corrosive media. For Universal Valve for air and steam, non-closed Universal Valve are often used.
What are the requirements for Check Valve installed on thermal oil systems?
As one of the most widely used equipment in the industry, the thermal oil furnace is a pressure vessel. Its safe use is related to the safety of people's lives and property. Therefore, the last fuse of the thermal oil furnace = Check Valve and Universal Valve play a role Therefore, the installation of Check Valve and Universal Valve on thermal oil furnaces must comply with the following technical requirements:
Adjustable Check Valve seating pressure
The Universal Valve relies on the force of the spring to press the valve core on the valve seat, so that the Check Valve is in a closed state, and the bottom of the valve core is pushed upward by the force of steam. During normal operation, the downward pressing force of the spring is greater than the upward thrust of the steam, and the valve is in a closed state. When the steam pressure reaches the Check Valve seating pressure, the force of steam on the valve core is greater than the force of the spring, causing the valve core to lift and the Check Valve to exhaust steam. The seating pr
Universal Valve selection principles
The Universal Valve is a special valve whose opening and closing parts are in a normally closed state under the action of external force. When the medium pressure in the equipment or pipeline rises above the specified value, it discharges the medium outside the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value. . Universal Valve are automatic valves that are mainly used in boilers, pressure vessels and pipelines to control pressure not to exceed specified values and play an important role in protecting personal safety and equipment oper
What are the key points in the installation of Check Valve and their pipeline layout design?
(1) Check Valve on equipment or pipelines should generally be installed upright. However, Check Valve installed on liquid pipelines, heat exchangers or containers, etc., can be installed horizontally in places where the pressure may rise due to thermal expansion after the valve is closed; (2) The Check Valve should be installed as close as possible to the protected equipment or pip
Performance comparison of Check Valve and bursting disc
1. Check Valve: It reduces the excessive pressure in the container by automatically opening the valve to discharge gas. (1) Advantages: Only the part of the pressure in the pressure vessel that is higher than the specified pressure is discharged, and when the pressure in the vessel drops to the normal operating pressure, it will automatically close, so it can avoid having to discha
Check Valve is an important safety accessory for pressure-bearing special equipment
1. The Check Valve is an important safety accessory for pressure-bearing special equipment. The Check Valve is an automatic valve that uses the force of the medium itself to discharge a rated amount of fluid without resorting to any external force to prevent the pressure from exceeding the rated value. When the pressure returns to normal, the valve will close again and prevent the medium from continuing to flow out. Check Valve is an important safety accessory for special pressure-bearing equipment such as boilers, pressure vessels and pressure pipelines. It is a safety device installed
Precautions when using Check Valve
Check Valve is a special device for pressure relief, which plays an important role in protecting accessories. Check Valve are generally installed directly on special equipment. Its design, manufacturing, installation, use, inspection, etc. must meet the requirements of special equipment, because its action reliability and performance are directly related to equipment and personal safety, and are closely related to energy conservation and environmental protection.
The Check Valve must be installed vertically at the highest position of the drum header
As one of the most widely used equipment in the industry, the thermal oil furnace is a pressure vessel. Its safe use is related to the safety of people's lives and property. Therefore, the last fuse of the thermal oil furnace = Check Valve and Universal Valve play a role Therefore, the installation of Check Valve and general valves on thermal oil furnaces must comply with the following technical requirements:
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