Gold Member Since 2014
Audited Supplier
Zhengzhou Great Machinery Co., Ltd.

Automatic Screen Changer, Backflush Screen Changer, Scren Changer manufacturer / supplier in China, offering Automatic Self Cleaning Filter, Melt Filtration Products-Double Plate Type Continuous Polymer Melt Filter, Dual Piston Screen Changer for LDPE Recycling Machine and so on.

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Automatic Self Cleaning Filter

FOB Price: US $30,000-40,000 / Set
Min. Order: 1 Set
Min. Order FOB Price
1 Set US $30,000-40,000/ Set
Get Latest Price
Port: Shanghai, China
Production Capacity: 100 Sets/Year
Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram
Basic Info
  • Model NO.: GM-DP-BF series
  • Plastic Processed: PP
  • Feeding Mode: One Feed
  • Engagement System: Full Intermeshing
  • Exhaust: Exhaust
  • Computerized: Computerized
  • Treatment: Nitriding Treatment
  • Mode: Different Mode to Be Matched with Extruders
  • Trademark: GMACH
  • Specification: CE
  • Type: Sheet Extruder
  • Product Type: Granulating Extruder
  • Screw: Twin-Screw
  • Screw Channel Structure: Deep Screw
  • Automation: Automatic
  • Raw Material: High Quality Alloy Steel
  • Fit for Material: PMMA,PC,PP,PE and Pet
  • Service: Customized Design
  • Transport Package: Seaworthy Packaging
  • Origin: Zhengzhou
Product Description

Although we registrated as a trading company here , but we have our own factory, equipped with all needed product processing machinery. So we can control and guarantee the quality of all our products.We do not just sell the products but also provide the best solution for you, your success is our ultimate goal.
We promise to all customers: Service life of our products up to 10 years, and maintenance for free within one year .
Cooperate with us =Get the perfect solutions 
Product Description
 Automatic self cleaning filter
Double piston backflush screen changer with 4 screen cavities fortwin screw extruder
GM-DP-BF series Automatic  backflush screen changer( double piston screen changer with four working positions)
Automatic Self Cleaning Filter
Automatic Self Cleaning Filter
In order to considerably increase the lifetime of the filter media GMACH offers automatic backflush screen changers.
Working principle (backflush process)of this  double piston backflush screen changer with 4 screen cavities fortwin screw extruder
These systems work as follows: When a pre-defined pollution degree is reached, the backflushing automatically starts.
Then the contaminations from the screen pack are led out of the machine via a spillway. The contaminated backflush mass leaves the machine by means of heated backflush outlet pipes which are installed at the screen changer housing. There the small quantity may be removed or collected.

With the-channel screen changers additional slide valves are used at the backflush channels. There is no interference of the process during backflushing.
Features included
1,Continuously working melt filter
2,Four working stations 
3,venting groove can discharge the gas mixed in the raw material 
4, no interference during the process of backflushing
5,the screen cleaning reached 85%
6, long life span of the filtration screen pack/mesh , it owning to up to 100 times backflushing at most.

screen change process
The screen changer and gas venting process of this kind of   Double piston backflush screen changer with 4 screen cavities fortwin screw extruder
The following process is based on standing face to the screen changer and extruder
one rod is pushed out on the left side of the housing of the screen changer by hydraulically
the blocked filter screen pack is removed and replaced by a fresh one
the rod is pushed into the housing of the screen changer
this rod is pushed out on the rignht side of the housing of the screen changer by hydraulically.
the other one blocked filter screen pack on this rod is removed and replaced by a fresh one.
the other rods repeat the above steps
The gas venting systen begins to work when the rod is pushed into the housing of the screen changer, and the following picture show the process of gas venting of this type of dual rods continuous extrusion screen changer for polymer melt filtration.

Automatic Self Cleaning Filter
Main application fields of  Double piston backflush screen changer with 4 screen cavities fortwin screw extruder
for compounding, semi-finished production, recycling, manufacturing of fibers, polymerization, film extrusion
for fully automatic production processes
Optional choice
support stands
down stream equipments: suach as Gmach melt gear pump
filter mesh/screen
vacuum cleaning furnace

Company information
Gmach Factory 
Automatic Self Cleaning Filter
Gmach customers
Automatic Self Cleaning Filter

Tips for customers

How to choose a most suitable type of screen changer for your extrusion line ?
After the equipment supplier making a size recommendation and then you should perform your own analysis to confirm appropriate sizing. That way, you will have the advantage of independent analyses and, best of all, there is no additional cost.
Learn the difference between price and cost. Be sure to take into consideration all of the variables and look at all the factors to determine the real cost of ownership for the screen changer. Some of the hidden variables to consider may be:
*Product quality.
*Maintenance, time and cost of parts.
*Process downtime and cost.
*Life expectancy for the equipment and amortized cost of ownership.
*Cost and availability of filtration media.
*Pressure loss and effect on line output and product quality.
*Operator safety.
*Required operator intervention and labor cost.
If all of these and other factors are taken into consideration, you can choose the most suitable solution, and then you can expect a much better return on investment.

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