JHPU-GZ1 is super reliable and easy-operated. Its advantages consist in compact structure, serviceable accessories, light weight and long life span. There is no need to take care of the congestion problem. JHPU-GZ1 is very easy to start because its air cleaning device can effectively prevent the machine from breaking down due to piston congestion. JHPU-GZ1 can support almost all types of proportioner pumps. It can adjust the spraying quantity and work perfectly with different PU machine models. Product Features 1. The optimized positions of conduits' connections reduce much burden of spray gun and make it easy-operated. 2. The air slide valve can effectively prevent the trigger from sticking. 3. The subsidiary air spring can promptly cut off entering materials from blending chamber. 4. No need for adjustment on spot. The gun sprays continuously and fluently. 5. Air-driven trigger can lighten much workload of operators. 6. The blending chamber made of whole steel assures large output, accurate control of spraying direction and less waste of materials. It is specially fit for spraying the inner walls of adjoining houses. 7. The one-way valve can avoid reflux of materials. Most sealing parts can be checked without the need to disassemble the gun. 8. Only using manual switch can promptly switch on and off the gun with ease. 9. High pressure and vacuum blending guarantee the optimal mixing effect and maximum output. Technical Data: 1. Blending: Inner vacuum blending 2. Function: Spray & injection 3. Cleaning: Continuously air cleaning solves the congestion problem. Operators need not to take care of solidification of materials when disassembling the gun.