Discover the pinnacle of innovative filtration technology with our Automatic Backwash Filter, an advanced self-cleaning system engineered for unparalleled efficiency. Crafted with multiple robust stainless steel filter elements, this cutting-edge device ensures uninterrupted filtration 24/7, making it a steadfast guardian of purity. Our filter excels in eliminating solid particle contaminants from a variety of water sources and low-viscosity liquids, including rolling emulsions, to achieve superior liquid cleanliness. This pristine level of filtration is vital for maintaining optimal system operations and safeguarding essential downstream equipment. With its versatile application, our Automatic Backwash Filter is a trusted ally across diverse industries such as oil & gas, metallurgy, marine filtration systems, water treatment, and the Pulp & Paper sector, where reliability and performance are paramount.
Witness the ingenuity of the Automatic Backwash Filter as it masterfully orchestrates a seamless filtration process: the unfiltered liquid gracefully enters the system from the inlet, with 50% channeled through the central distribution tube, proceeding elegantly towards the filter's apex. From here, it flows into the filter elements from the top, while the remainder descends directly into the filter elements from the base, ensuring a thorough and efficient purification journey. Once the liquid reaches the filtering elements from both upper and lower ends, it emerges purified from the outlet. When the system detects a pressure drop or when the preset time is reached, the intelligent automatic backwash sequence is initiated. This triggers the gear motor to activate the back-flushing rotation arm, which delicately and systematically cleans each filter element in succession, all while maintaining continuous filtration. During this sophisticated backwashing process, the uppermost part of each filter element is gracefully covered by the sliding block as the back-flushing valve opens. The differential pressure between the filter element's exterior and the back-flushing outlet allows the pristine filtrate to gently reverse-flow, meticulously cleansing the filter element's inner surface. The dislodged impurities are then effortlessly expelled through the sewage pipe, completing the impeccable filtration cycle.
Details photos
Applicable Liquid |
Raw water, cooling water, process water and low viscous liquid(<40cps), TSS<300ppm |
Min. Working DP |
Differential pressure between the outlet and back-flushing outlet >0.15mPa |
Filtration Rating |
50-2000µm |
Standard Design Pressure |
0.7MPa/1.0MPa, higher pressure rating available |
Housing Standard |
Factory Standard/ASME/PED/GB150 |
Fluid Working Temperature |
0-95°C |
Flowrate Range |
17-10560m³/h |
Self-cleaning DP |
50-70kPa |
Control System |
Based on SIEMENS controller, parallel control mode of D.P. and time |
Gear Motor |
180W/370W, 3 phases, 380V, IP55, CCWU |
Inlet and Outlet Size |
2"-24"/DN50-DN1000 |
Connection Standard |
Flange,HG20592-2009(DIN compatible) / HG20615-2009(ANSI B16.5 compatible ) |
Filter Element |
V-SLOT Slotted SS filter element, SS 304 / 316L, duplex SS 2205 / 2507 |
Wet Part Material |
304/316L/CS, special material available( such as duplex SS 2205 / 2507) |
Inner Corrosion Protection |
Expoxy paint, PA11 or rubber Lining for sea water resistance |
Housing Sealing Material |
NBR /EPDM/ VITON |
Back-Flushing Valve |
Wafer butterfly valve / full-port ball valve |
Valve Actuator |
Pneumatic or electric, IP65 |
Facility Supply |
0.4-0.6mPa clean and dry air, 380V AC |
- Experience seamless and uninterrupted automatic online filtration with our cutting-edge technology. Our system is designed to keep your operations running smoothly without any flow interruptions during back-flushing, significantly reducing downtime and maintenance costs.
- Boasting a compact design and offering super high filtration capacity within a single filter, our system dramatically saves on installation space and construction costs. It's the perfect solution for maximizing efficiency in limited spaces.
- With a diverse selection of filter housing and element materials available, our product caters to a wide range of filtration requirements, including raw water, cooling water, process water, and even sea water.
- The innovative multi-candle structure provides an extensive filter area with high dirt loading capacity, ensuring low surface velocity and minimal pressure drop. This results in lower back-flushing frequency and less water waste, optimizing resource utilization.
- Equipped with the V-SLOT high-performance filter element, featuring a unique V-shape slotted opening, our system delivers exceptional back-flushing performance, especially effective in filtering sticky contaminants with ease.
- Built with a robust and rigid structure that withstands high pressure impacts, our filter offers exceptional reliability and a long service life, often exceeding 10 years, making it a durable investment for your filtration needs.
- Our impulse back-flushing mechanism ensures rapid action and high back-flushing intensity, while minimizing flushing water purge. This enhances the efficiency and effectiveness of the cleaning process, reducing water wastage.
- Featuring double open ends on the filter element, our design allows water to flow from both sides, preventing clogging at one blind end and promoting a well-distributed filter cake. This results in high flow rates and minimal pressure drops, further enhancing performance.
- The D.P. transmitter, equipped with a local display as a standard feature, provides long-term stability and reliability. With remote monitoring support, it offers a significant improvement over common D.P. switches, ensuring precise control and monitoring.
- Our reliable automatic control system boasts a user-friendly interface and operation, efficiently managing the filter's performance with ease. It empowers operators to maintain optimal filtration function effortlessly.
Our Automatic Backwash Filter is a cutting-edge solution designed to seamlessly remove solid particle contaminants from water and low viscosity liquids, such as rolling emulsion. This remarkable system elevates liquid cleanliness to meet the rigorous demands of system operations and subsequent processes, ensuring optimal performance and protection for critical downstream equipment. As a result, these state-of-the-art automatic backwash filters have become indispensable across a wide range of industries, delivering unparalleled efficiency and reliability.
- Oil & Gas Industry: Our filters are tailored for injection well water filtration, serving as a crucial pre-filter in hydrocracking, hydrogenation modification, hydrorefining, and hydrodesulfurization processes. They play a vital role in preventing catalyst bed clogging, safeguarding the integrity and efficiency of these sophisticated systems.
- Metallurgy: Experience unmatched performance in rolling mill coolant filtration, ensuring that operations run smoothly and efficiently with our advanced filtration technology.
- Marine Filtration Systems: Our filters excel in seawater desalination filtration and ballast water filtration, ensuring clean and safe water management in marine environments.
- Water Treatment: Our solutions are a perfect match for boiler supply water filtration, maintaining the purity and functionality of water in treatment systems.
- Pulp & Paper Industry: Our filters provide exceptional starch slurry filtration and paper making water filtration, supporting the integrity and quality of production processes in this sector.


Hebei SLOT Filter Technology Co., LtdHebei SLOT Filter Technology Co., Ltd. stands as a pioneering force in the realm of industrial precision filtration and self-cleaning systems. With a rich legacy spanning over a decade, we boast unparalleled expertise in design and research & development. Our commitment to innovation is reflected in our use of cutting-edge filtration technology and premium-quality resources. We are dedicated to delivering all-encompassing, one-stop filtration solutions that cater to the diverse needs of our valued customers.
At SLOT, adherence to excellence is paramount. We proudly hold the ISO9001 quality management system certification and have also achieved prestigious certification from SGS. Our unwavering commitment to upholding international standards, industry-specific regulations, and bespoke client specifications ensures that our product design and manufacturing processes are second to none. We are steadfast in our pursuit of crafting high-performance, superior-quality filtration equipment and precision components.
SLOT's state-of-the-art automatic self-cleaning filter systems are trusted across a plethora of industries, including petrochemicals, fine chemicals, energy and power, water treatment, automotive manufacturing, food and beverage, and metal processing. Our reputation for excellence has enabled us to forge enduring partnerships with prominent industrial enterprises, both at home and abroad, securing SLOT's position as a leader in the filtration industry.
Renowned for exceptional filter performance, cutting-edge manufacturing capabilities, and unparalleled professional services, SLOT has garnered extensive acclaim. For those who demand the highest standards in filter system performance, quality, safety, and service excellence, SLOT emerges as the partner of choice, committed to delivering unmatched value and reliability in every engagement.

Quality Management
FAQ
1. Who are we?
Established in 2014, Hebei Slot Filter Technology Co., Ltd. is a pioneering force in Hebei, China. Our innovative solutions have captivated markets around the globe, with presence in North America (40.00%), Western Europe (30.00%), and expanding across dynamic regions like South Asia (10.00%).
We also extend our reach to Africa (10.00%) and the Middle East (10.00%). Our committed team, comprising of approximately 11-50 dedicated professionals, stands at the forefront of global filtration technology.
2. How can we guarantee quality?
To ensure impeccable quality, we meticulously provide a pre-production sample prior to mass production.
In our relentless pursuit of excellence, we conduct a thorough final inspection before each shipment, securing the highest standards for our customers.
3. What can you buy from us?
Our diverse product offerings include expertly crafted Johnson Screen, Bridge Slotted Well Screens, and Sand Control Well Screens. Additionally, we offer Gravel Pre-pack Screen, Pipe-based screens, Perforated Pipes, and top-tier API/5CT Casing and Tubing, tailored for your needs.
4. Why should you buy from us not from other suppliers?
1. We provide robust OEM & ODM support, customizing products to match your specifications.
2. Our team excels in assisting customers with bespoke design drawings, ensuring perfect alignment with your vision.
3. Our dedicated research and development team is at the cutting edge of innovation, consistently pioneering new advancements in filtration technology.
5. What services can we provide?
We offer flexible delivery options including FOB, CFR, CIF, EXW, FAS, CIP, FCA, CPT, DEQ, DDP, DDU, Express Delivery, DAF, and DES, tailored for your convenience.
Our payment terms are equally adaptable, accepting currencies like USD, EUR, JPY, CAD, AUD, HKD, GBP, CNY, and CHF.
We accommodate diverse payment methods such as T/T, L/C, D/P D/A, MoneyGram, Credit Card, PayPal, Western Union, Cash, and Escrow.
Our multilingual team is proficient in English, Chinese, Spanish, Japanese, Portuguese, German, Arabic, French, Russian, Korean, Hindi, and Italian, ensuring seamless communication.
If you are inspired to become our valued agent in your local market, we invite you to reach out and explore this opportunity with us.