I. Technical performance
A. Fengyu SF6 Retrieving Device can be used to extract, liquefy and store SF6 gas from the insulating equipment. The quality of the retrieved SF6 gas complies with Chinese GB8905-88 standard.
B. To extract air and water from the equipment after maintenance.
C. To store the SF6 gas after it goes through the drying and filtration process.
D. To gasify the liquefied SF6and and fill up the insulating equipment again from the storage vessel;
E. The drying and filtration device can be activated and reused.
F. It is equipped with flexible pipes and joints for retrieving, storing and refilling processes.
G. General composition
1. Fengyu SF6 Retrieving Device is composed of retrieving, filling, filtration, vacuuming, storing and controlling systems.
2. The device has thee strong design features, rust proof, shock proof, and reliability.
3. Operational and maintenance ease.
4. Rotary parts are well protected for safety.
H. Additional Features
1. Feature to check vacuum pressure for the retrieving device, including its storage vessels and pipes;
2. Checks vacuum pressure for the insulation equipment
3. Retrieves and store SF6 gas and checks the remaining vacuum pressure of all the insulation equipment;
4. Eliminates water content and other particles in the SF6gas with filtration and purification process;
I. Refill up the SF6 gas into the insulating equipment to specified operating pressure
5. Well designed in both a vertical or horizontal way, with all connecting joints reliably fastened, well sealed piping system that is airtight and dust proof.
J. Storage vessel
Designed, manufactured and checked in accordance with Chinese GB150-89 standards for compressed vessels; Rust-proof treated inside and painted externally; it is equipped with pressure gauge, high pressure monitor and relief valve and liquid level monitor;
K. Gas retrieving system
Is composed of an air compressor, bumper, separator, filter, heat exchanger, safety valve, one-way valve, gas pressure gauge, vacuum gauge, and freezer;
L. Vacuum system
Is composed of vacuum pump, vacuum gauge (sensitivity≥10Pa) anti-adverse-flow device of vacuum pump oil, and air exhaust pipes;
M. Filter
The filter is designed to efficiently remove water and solid particles in the oil preventing penetration downstream and also removes the air originated from the SF6 electric etc. The retrieving system and refilling system have their own independent filters.
N. Valves
All valves are well sealed, ensuring there is no air or gas leakage, easy to operate, reliable, rust proof and has a long operational life.
