Referring to the power industry standard DL/T 662-1999 "Technical Conditions for SF6 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, 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 equipment
● Compressing and liquefying SF6 gas from electrical equipment for storage
Device Features
● Adopts the design principle of freezing and liquefaction, 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 (performance far exceeds 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 single-container recovery device has a cylinder filling capacity of not less than 30kg.
● The dual-container system has an innovative SF6 vaporization method, using high-temperature, high-pressure SF6 gas to force low-temperature, low-pressure SF6 liquid into cylinders, with short filling 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 gas filling.
● Excellent imported (US) oil mist filtration system ensures oil content meets standards. The compressor lubricating oil ensures no need for replenishment within one year, and the oil level is guaranteed not to decrease.
● The molecular sieve drying system has reliable performance. The molecular sieve does not need to be disassembled, dismantled, or replaced during regeneration, making it convenient to use. Only a self-regeneration operation of the molecular sieve dryer is required, and the drying performance can be restored to its original state.
● All ball valves adopt the working principle of American Swagelok, with sealing elements having automatic compensation performance. They are practically applied to vacuum and pressure conditions, ensuring no leakage under both vacuum and pressure, and are special ball valves for both vacuum and pressure use. (Original American Swagelok 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 optionally drawn on the panel for convenient and intuitive operation. All ball valves are used, with clear open and closed states.
● Adopts air-cooled, mobile design, 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.
