It may cause by the following reasons, you could find out and solve the problem.
1. Wrong set of back-pressure valve; Turn to the required pressure
2. Something stuck in the back pressure valve; Just remove and clear
3. Back pressure valve damage; Change a new one
4. Auxiliary cylinder seal damaged; Change a new one
Address : No.78, Bangtai Road, Qingmeng Zone, Quanzhou, Fujian, China
Tel : 86-595-22216883
Whatsapp : 15905996312
Email : machine@hongancn.com
