
The automatic unloading start valve is used in compressed air pipeline systems such as Roots blowers or screw blowers. When the blower starts, the conveyed gas flows into the outside through the unloading valve, and the blower starts with a slight load. At the same time, due to the pressure difference between the gas in the pipeline and the outside atmosphere, the start valve is slowly closed, allowing the conveying gas to flow into the normal working pipeline. Realizes the micro-load start of the blower or other compressed gas supply equipment, and avoids the impact on the main body of the equipment, the impact of the driving equipment and the damage to the transmission mechanism caused by the direct load start.
Features
● Pure mechanical structure, ingenious and reasonable design, reliable and trouble-free operation.
● Avoid the cumbersome and troubles caused by the use of bypass, electric valve or actuator, and then control by electrical control equipment.
● Cancel the bypass, electric valve or actuator and related control mechanism, the system cost is low.
● Easy to install and easy to maintain.
Parameter
type | flow range | pressure range | flange size |
YUSV20 | 2~20m/min | 15~200KPa | DN65(GB9119.7-88) |
YUSV25 | 20~200m/min | 15~200KPa | DN150(GB9119.7-88) |
YUSV30 | 150~400m/min | 15~200KPa | DN250(GB9119.7-88) |





