Referring to the power industry standard DL/T 662-1999 "Technical Conditions for Sulfur Hexafluoride Gas Recovery Devices" and the former Ministry of Machinery and Electronics Industry standard JB/DQ2588-90 "SF6 Filling and Recovery Devices", and also referencing the advantages of the world-renowned German brand DILO products, this SF6 gas recovery and filling device has been developed, making it more suitable for China's SF6 high-voltage switchgear industry.
Device Composition
The device consists of a recovery system, a filling system, a vacuum pumping system, a drying system, a purification system, and a storage system.
Main Functions
● Vacuum pumping and vacuum measurement of the device itself, as well as electrical equipment and storage tanks
● Recovery of gas from electrical equipment
● Drying and purification of recovered and refilled SF6 gas
● Filling SF6 gas into SF6 electrical appliances
● Compressed liquid storage of SF6 gas from electrical appliances
Device Features
● The design principle of freeze liquefaction is adopted, which reduces the working pressure of the system and greatly improves the recovery efficiency.
● The refrigeration compressor can be optionally equipped with an original French imported fully hermetic refrigeration compressor. It can also be upgraded for free to a semi-hermetic refrigeration compressor produced by a wholly US-owned enterprise, Emerson-Copeland (with performance far exceeding any original imported fully hermetic compressor of the same cooling capacity).
● The SF6 compressor is a semi-hermetic compressor produced by a wholly US-owned enterprise (Emerson-Copeland brand), applied to halogen gases such as SF6, with fluorine resistance characteristics, ensuring no leakage.
● The vacuum pump can be optionally equipped with a Japanese Ulvac two-stage rotary vane vacuum pump or a German original Busch, or a wholly German-owned Leybold, etc.
● Dual-container system, SF6 can be liquefied and filled into cylinders, with a filling capacity of not less than 50kg. The filling capacity of a single-container recovery device is not less than 30kg.
● The dual-container system has an innovative SF6 vaporization method, using high-temperature, high-pressure SF6 gas to forcibly fill low-temperature, low-pressure SF6 liquid into cylinders, with short time and large filling capacity.
● A column-type liquid level gauge can be used, providing intuitive and accurate SF6 liquid level indication. The liquid level has backlight indication, making it clear and easy to read.
● The liquid storage container is equipped with a high-power SF6 vaporization electric heater. During use, automatic temperature control is performed to fully vaporize SF6 for external filling.
● Excellent imported (US) oil mist filtration system ensures oil content meets standards. The compressor lubricating oil is guaranteed not to need replenishment within one year, and the oil level is ensured not to decrease.
● The molecular sieve drying system has reliable performance. When regenerating the molecular sieve, there is no need for disassembly, dismantling, or replacement, making it convenient to use. Only a self-regeneration operation of the molecular sieve dryer is needed, and the drying performance can be restored to its original state.
● All ball valves adopt the working principle of American Swagelok, and the sealing elements have automatic compensation performance. They are practically applied in vacuum and pressure conditions, ensuring no leakage in both vacuum and pressure, and are special ball valves for both vacuum and pressure use. (American Swagelok original ball valves can also be selected).
● Customized phase sequence protection device, with a withstand voltage of up to 500V, greatly improving reliability.
● Three-phase five-wire power supply, safer and more reliable.
● The flow chart can be drawn on the panel, making operation convenient and intuitive. All ball valves are used, and the open and closed states are clear.
● Air-cooled and mobile, it can be used without a water source.
● The vacuum gauge is a digital display Pirani vacuum gauge.
● High-quality casters for easy movement without damaging the floor.
