First, we replaced the former system by HGB in - line vane pump.However, it failed to achieve good result.Later, we took QYB vane pump.This kind pump can meet all requirements.

• 在实践中先后采用HGB管道式滑片泵和QYB滑片泵替代原水环式真空泵,辅助离心泵卸油,试验结果表明,前者效果不好,后者可完全满足工艺要求。