HRF-Ex Automatic roll filterPosition：Home > Products > Air Filtration Unit > HRF-Ex Automatic roll filter
- HRF-Ex Automatic roll filter
- Submit Order
HRF-Ex Automatic roll filter is a special filter equipment applied to chemical plants and other industries with hidden danger of flammable and explosive media. This product is a kind of large air volume primary air filtration equipment with the new non-woven fabric as the filter medium and the signal of pressure difference before and after the filter is calculated to control the automatic replacement of the filter material.
HRF-Ex Automatic roll filter has a novel design, reasonable structure, easy to use and maintain, and easy to transport and assemble. The filter adopts herringbone or flat structure to increase the effective filtration area and meet the design requirements of large air volume filtration. The filter material used has high strength and good chemical stability, and does not produce toxic and harmful substances when burning under fire conditions, and is durable.
◆Filtration efficiency grade: G4-F9(EN779)
◆Air speed: recommended value ≤2.5m/s
◆Final resistance: 250-300Pa
◆Ambient air temperature: -10℃～＋40℃
◆Relative humidity of the use environment：90%RH
Intelligent automatic filter media replacement system: through the
differential pressure control system to determine whether the filter media
needs to be replaced, to reduce the intensity of manual operation, to ensure
that the filter operation to achieve the best efficiency and the most
Explosion-proof device: conform to explosion-proof grade Eexd IIBT4, protection grade IP55. when handling dust, it effectively avoids the explosion caused by static electricity and sparks.
Differential pressure control system: There is a differential
pressure tester installed at the inlet and outlet of the filter material, and
the final resistance of the filter material is preset according to the
requirements of the use environment. When the differential pressure is greater
than the set resistance, the PLC will send a signal to the motor to run and the
motor will start to change the material.
Alarm function: When the equipment runs out of filter material, the alarm light on the control cabinet will light up, and the PLC will output an alarm signal at the same time, and the central control room will receive the alarm signal if there is a signal receiving device.
Smooth transmission system: Adopt the international famous brand reducer motor, and use the chain transmission with the speed ratio of 1:1 between the shaft and the axle to effectively ensure the safety of the machine and the smoothness of the transmission.
High quality filter: The filter material is made of synthetic fibers
arranged in a density gradient combination, with good comprehensive performance
of ventilation and dust removal, low resistance, high strength, temperature
resistance, non-toxic, tasteless and non-volatile. The two sides of the filter
media are designed with wrapped edges to effectively prevent the air leakage on
both sides of the filter media.
Modular assembly: modular assembly method, tightly connected, easy to assemble, especially suitable for large working area.
the three-view drawing for HRF-Ex Automatic roll filter
HRF-Ex Automatic roll filter is mainly composed of filter media, explosion-proof transmission system and explosion-proof automatic control system. When the incoming air with high concentration of dust-containing air passes through the winding filter, the pressure difference between the front and rear of the filter rises gradually with the increase of filter dust; when the filter resistance rises to the set final resistance value, the pressure difference switch starts to act and the winding system updates the filter media; when the winding time is reached, the transmission stops and the work of updating the filter media is completed and the filtering is carried out again. This machine currently has four types to support customization: Ex——Ex total mark ib level intrinsically safe; II——plant explosion-proof equipment; B——applicable flammable and explosive gases for Class B gases (including Class A gases); T4——The maximum surface temperature of this equipment does not exceed 135 degrees.
the structure chart for HRF-Ex Automatic roll filter
1、When the whole roll of filter material is used up, the digital alarm of
filter material on the panel of electric control box and the red light on the
control board are always on to remind to replace the filter material.
2、Turn the equipment to manual gear and roll all the filter material to
the lower reel.
3、Loosen the bolt nut (one at one end) for fixing the lower reel.
the structure chart for HRF-Ex Automatic roll filter
4、Take off the filter material and the lower reel, and pull out the lower
5、Open the upper material box, loosen the bolts and nuts on both sides
and take off the upper reel.
6、Putz the upper reel through the new filter media center core and put it
into the upper material box (Note: the upper reel must be stuck into the upper
Overall structure chart Chain drive diagram
Mainly used in petroleum, chemical, gas, metallurgy, textile, mining, pharmaceutical, food, grain and oil processing and other industries with high degree of dust-containing gas or hidden danger of flammable and explosive media.
Left filter media shaft right filter media shaft Lower filter media shaft