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About usAn industrial and trade fire company integrating the development, production, sales, and service of fire accessories.
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2025
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11
Filtering Foot Valve：Filter + Check Valve, Hassle-Free!
The core value of a filter foot valve lies in its protection of the system's operational foundation. As a specialized type of check valve, it integrates three key functions: First, the impurity interception barrier—through a standard 0.63mm mesh screen (customizable as needed), it effectively blocks debris such as sediment, aquatic weeds, and solid particles from the water source, preventing issues like pump impeller wear and pipeline blockages at the source. This is particularly critical for agricultural irrigation with complex water quality or industrial applications involving particulate media. Second, the backflow prevention safeguard—when the pump stops, the valve flap automatically closes under water pressure and its own weight, preventing medium backflow in the pipeline and ensuring the suction pipe remains filled with liquid, completely avoiding "dry running" and the hassle of refilling. Third, the cavitation prevention mechanism—by preventing air from entering the pump chamber, it maintains system vacuum, avoiding problems like pump noise and flow fluctuations caused by cavitation, which is especially crucial for precision equipment such as metering pumps.
Did you know? In fluid delivery systems such as water pumps and irrigation, there's a "trouble-preventing expert" hidden—the Filtering Foot Valve. This small component installed at the bottom of the suction pipe may seem inconspicuous, but it helps the system avoid a lot of trouble.
The Essence Unveiled: It's the Golden Combination of "Check Valve + Filter"
The bottom filter valve is not a single-function component but a precision assembly 
that integrates two core functions: "check control" and "impurity filtration." It is primarily installed at the bottom of suction ports in containers such as reservoirs, water tanks, and sewage tanks, directly connected to the suction pipeline. Its core structure consists of three parts: a pressure-resistant and wear-resistant valve body (often made of cast iron, stainless steel, or engineering plastics), a check valve core responsible for one-way flow control (commonly spherical or conical, opening and closing automatically via fluid pressure), and a filter screen that intercepts impurities (with mesh sizes ranging from dozens to hundreds). This "two-in-one" design makes it the "first line of defense" for fluids entering the system.
Three Core Functions: The "Protective Umbrella" for System Stability
The role of a filter foot valve may seem simple, but it permeates the entire operation of a fluid system, with each function helping users avoid major issues:
- Preventing Backflow and Eliminating Pump "Dry-Run Crisis": When the pump starts, fluid pressure lifts the check valve core, allowing smooth entry into the pipeline. After shutdown, the valve core automatically closes under gravity and backflow fluid pressure, completely blocking fluid backflow in the pipeline. This function not only prevents pump failures such as impeller overheating and motor burnout caused by dry running (no cooling medium) but also ensures the pipeline remains filled with fluid. This eliminates the need for re-priming and venting during the next startup, significantly improving efficiency. For example, in agricultural irrigation, pumps equipped with filter foot valves can restore water supply in just 3–5 seconds after restarting, nearly halving the startup time compared to pumps without this component.
- Filtering Out Impurities and Reducing "Clogging Risks": The filter screen is the "core defense line" of the filter foot valve, precisely intercepting impurities such as sediment, gravel, aquatic weeds, and fibers in the water. It’s worth noting that sand particles as small as 1 mm in diameter can cause impeller wear or valve core jamming once they enter the pump, while fibrous impurities like weeds are the main culprits behind pipeline blockages. A small food processing plant once suffered a four-hour production halt and over ¥10,000 in direct losses due to pipeline clogging caused by impurities in raw water—highlighting the critical importance of filter foot valves.
- Ensuring Stable Fluid Supply and Extending Equipment "Lifespan": Through the dual functions of one-way flow control and impurity filtration, filter foot valves ensure that fluid entering the system is "clean and orderly," reducing friction wear and failure rates in equipment components. Data shows that fluid systems equipped with qualified filter foot valves can extend the lifespan of core equipment like pumps by over 30%, while annual maintenance costs can be reduced by 20%–40%.
Selection + Maintenance: Two Tips to Maximize Your "Invisible Guardian"
Choosing and using a filtration foot valve correctly ensures it delivers optimal value. Master these two key points:
- Precise Selection: Material + Precision for the Right Scenario
- Material Matches Medium: For ordinary clean water or irrigation, opt for cast iron valve bodies + nylon filter screens—cost-effective and durable. For corrosive media like seawater or acid/alkali solutions, choose 316 stainless steel valve bodies + titanium alloy screens to prevent corrosion. Food and pharmaceutical industries require hygienic-grade stainless steel to avoid contamination.
- Precision Meets Needs: Select mesh size (micron rating) based on impurity size—80-120 mesh suffices for farmland irrigation or garden watering, blocking weeds and coarse sediment. Industrial wastewater treatment or precision cooling systems need 200-300 mesh fine screens to trap tiny particles. For ultra-clean media (e.g., purified water), 50 mesh coarse screens minimize flow loss.
- Simple Maintenance: Routine Checks, Zero Hassle
Maintaining a filtration foot valve requires no expertise:
Monthly post-shutdown inspections: If debris accumulates, close the inlet valve, remove the screen, and clean it with a high-pressure hose or soft brush (avoid stiff brushes to prevent damage).
Quarterly checks on check valve seal integrity: If minor backflow persists after shutdown, replace the valve seal ring.
Long-term disuse: Disassemble, clean, and dry components to prevent rust or valve jamming.
Though unassuming, the filtration foot valve is the "invisible guardian" of fluid systems. Pick the right model and perform simple upkeep—it’ll shield your equipment from failures and cut maintenance costs. Next time your fluid system acts up, don’t overlook this "little hero"!
The filter foot valve may be just a "small component" in fluid delivery systems, yet it serves as a "critical line of defense" for safeguarding system security and ensuring operational efficiency. It precisely intercepts sand, impurities, and solid particles in water, preventing issues like pump wear, pipeline blockages, and valve jams at the source. This not only reduces production interruptions and economic losses caused by unexpected shutdowns but also extends the lifespan of core equipment such as water pumps and motors. Additionally, it saves labor and material costs associated with frequent disassembly and repairs. Whether in industrial circulating water systems, municipal water supply pipelines, agricultural irrigation pump units, or wastewater treatment media transmission lines, the filter foot valve, with its core function of "blockage prevention and equipment protection," becomes the "invisible guardian" of stable system operation.
Choosing to use a filter foot valve is never an "additional expense" but rather a "precise investment" in production efficiency and an "effective cost-saving measure" for operational expenses. Today, green production and efficient operations have become common goals across industries, and a small filter foot valve is precisely the "small yet crucial step" toward achieving these objectives.
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we mainly have: water system accessories, stainless steel fire boxes and foam fire hydrant box accessories, valve accessories, intelligent above-ground hydrants and intelligent end-of-line test devices and automatic fire cannons, as well as accessories and fire equipment and valve product OEM processing.