The pull-off valve is specially used for CNG car refueling, and can be used with any CGV1 standard refueling equipment. If the car suddenly starts unexpectedly during the filling process of the dispenser, the pull-off valve (400 ～ 600N safety pull-off) on the filling hose can be automatically separated and cut off the air supply at both ends to prevent the danger caused by misoperation.
The main purpose of natural gas pull-off valve : The pull-off valve is designed to be installed on the loading and unloading hose of chemical raw materials (such as liquid propane, ammonia, ethylene oxide, liquefied petroleum gas, butadiene, industrial methanol, and natural gas). When pulling force, the pull-off valve will be automatically disconnected to prevent leakage caused by the unloading of the loading and unloading tank truck and prevent accidents from causing greater harm to personnel and equipment. The pull-off valve uses the standard component design, has good interchangeability, can easily remove the pull-off valve from the conveying pipeline, and does not require any special tools during maintenance and inspection.
The valve has two connection methods: flange and internal thread. The internal thread is the longest for 3/8 and 1/2.
Emergency pull-off valve (also known as rupture protection device) as a safety component can effectively avoid accidents from dangerous sources during the loading and unloading of fluid media: Accidental and excessive tensile loads on loading and unloading pipelines, such as premature by tank cars and train Pull load caused by starting or ship drifting. Such a tensile load may cause mechanical damage or even damage to the connection and the loading and unloading pipelines, resulting in uncontrolled leakage of the loading and unloading medium, which will harm humans and the environment to a certain extent.
To prevent such dangerous situations, emergency pull-off valves usually have the following two functions:
1) Has a predetermined disconnect mechanism that responds within a sufficiently large range before reaching the load limit.
2) It has an instantaneous automatic blocking device at the disconnection point to prevent medium leakage.
Pull-off valve (emergency release device) can prevent leaks caused by accidental hose breakage. Applications include ship-to-shore unloading, tank and road loading and unloading of roads and railways, and other fixed and mobile fluid storage devices such as crane pipes, fluid transfer arms and Connection between transport carriers. The emergency release system emergency release coupler ensures the greatest degree of safety in fluid transportation in marine and land crane pipes. With a simple and unique design, when the crane tube exceeds the rated capacity of the operating system, this system can be automatically and safely disconnected in the crane tube without any leakage. This has the advantage of ensuring triggering in the event of a danger, closing the valve instantaneously, very few drips and relatively small pressure losses. The breaking mechanism must ensure that the equipment can be automatically and quickly disengaged during "emergency disengagement"; also ensure that there is a "buffer period" before disengagement to avoid "disengagement" during normal operation and affect normal loading and unloading operations. For details, please refer to the TUV standard and the EU standard format of the Roman Seliguera valve.
Natural gas break-off valve