The KDQH-66 SF6 gas recovery, purification, charging and discharging device is composed of a recovery system, an inflation system, a vacuum extraction system, a purification system, and a gas storage system. It is used in manufacturing plants of SF6 gas insulated electrical equipment, as well as in research and operation departments, to evacuate various electrical equipment, fill them with SF6 gas, and recover SF6 gas from the used or tested electrical equipment. At the same time, it is purified, compressed, and stored in storage tanks.

The KDQH-66 SF6 gas recovery, purification, filling and discharging device adopts a mobile type and a relatively new SF6 dedicated valve technology. It is designed with comprehensive functions, reasonable structure, and simple and clear operation. The main functions of KDQH-66 are:
1. Vacuum pumping and measurement of vacuum degree for the device itself and electrical equipment;
2. Recovering gases from electrical equipment;
3. Drying and purifying SF6 gas for recycling and refilling;
4. Inflate SF6 electrical appliances;
5. Compressed storage of SF6 gas in electrical appliances.

1. High tech design, comprehensive functions, reasonable structure, and simple and clear operation.
2. Compression system: SF6 sealed compressor is used, with no leakage.
3. The vacuum pumping system adopts a two-stage rotary vane vacuum pump and is equipped with an automatic oil return prevention device in the system.
4. The purification system adopts the principle filter of CKD company in Japan. The filter adopts electric heating and contains high-efficiency adsorbent, and the purification effect is more significant (without frequent replacement of adsorbent).
5. Automatic confirmation of three-phase power supply and automatic protection against phase failure in the electrical system of the device.
6. The device control system adopts SF6 specialized valves with newer technology
7. The storage system is equipped with a 300kg liquid storage tank according to user requirements.
8. The device is mobile.

1、 Main technical indicators
(1) Type: Mobile, Refrigerated
(2) Working principle: Use compressor pressure to freeze and liquefy SF6 gas; Dryer assisted gas recovery and recharge; Inflate by buffering and vaporizing (can be heated).
(3) Working environment temperature: -10 ℃ (-30 optional) ---+40 ℃
(4) Main performance and technical parameters
1. The maximum vacuum degree of the device is less than 10Pa
2. Vacuum pumping rate of the device is 55m3/h (maximum vacuum degree of the vacuum pump is less than 0.06Pa)