Material feeds into the drum, is lifted up by the rotation as it falls back down. This action is repeated with each revolution along the length of the drum. The finer material passes through the screen openings while the larger material tumbles towards its eventual exit at the rear of the drum.

Descriptions
The Trommel screens provide a simple, efficient and economical solution to upgrade a wide rang of material and optimize the subsequent process steps of recovery. This method of screening helps to reduce operating and investment cost and to increase product quality, while allowing rapid and large volume processing. This material is then passed on to the downstream process equipment which can be in various forms such as centrifugal Concentrator, spiral chute, jig etc.

Zhengzhou Berno Machinery Equipment Co., Ltd. is a high-tech company which specializes in designing, manufacturing and selling the products of briquette production line equipment, stone crushing machine and screening machine.

Berno machinery has modern standard workshops, as well as advanced technologe and testing equipment, Extensively cooperating with coal research institutions and other research departments, Berno machinery has continuously improved product values and performance. Now we have been exported to Serbia, Romania, Mongolia, Indonesia, Kazakhstan, Vietnam, North Korea, Egypt, Ghana, Tanzania, South Africa, Canada, Chile, Bolivia, Mexico and other countried and regions, Berno Machinery provides space planing and design, equipment installation and commissioning support.

Berno Machinery holding the concept of "To survive with quality and develop with credit". Our company strives to biuld a brand enterprise with satisfaction of customers. Let customers buy reassured and use comfortablely. For users who ask us to design, manufacture and install formed coal production line, Our company will provide satisfactory products with the latest technologe, reliable quaity, favorable price and perfect service, We welcome friends from all circles

1. We can send special after-sales staff to instruct site installation.
2. We can assistance machine debugging and running test.
3. We can training operation workers on site.
4. After complete sets of equipments installation,leave one technical worker to assist customer(free charge) on-site production for half a month until satisfactory training operation workers on site.

Question 1: How to choose the suitable one?
     A:Please tell us your detailed requirements by mail or online,we will recommend the suitable one
        as your request, or customization as your request.
 
Question 2: Why the price is just a range?
     A:Because different model and qantity,the price is different,competitive price will be according to
        your model and quantity.
 
Question 3: How can I pay?
     A:We accept many payment,such as L/C, T/T, Western Union, Paypal, Moneygram.......
 
Question 4: When I receive it after pay?
     A:The normal models can be sent out within 7-10 days, it's according to your model and quantity,
         please contact us to check shipping time to your address.
 
Question 5: Is it will be broken during transport?
     A:Please don't worry,our goods with standard export package.
 
Question 6: What should I do if I don't know how to use?
     A:Please don't worry,manual user will be sent together,you can also contact us for technical support
 
Question 7: What should I do if some parts broken?
     A:Please don't worry,we have 12 months warranty except wear parts.
       You can also buy from us after 12 months.
Question 8: How long of your machine quality guarantee terms ?
Answer: Quality guarantee time is one year(wearing parts excluded).