Name: China 5 Microns 752mm Porous Bronze Filter Tubes For Fuel Filters manufacturers Customized Suppliers, Manufacturers - Free Sample - TOPTITECH Metal Materials
Brand: TOPTITECH
SKU: 259317357

TOPTITECH makes this filter tube from copper-alloy spherical powder, sintered at high temperature. The process leaves 30–40 % open porosity and gives a nominal 5-micron rating. Diesel, biodiesel, kerosene-it handles all the usual fuel types. The pore structure is uniform and interconnected, so it traps rust, sand, and weld scale while keeping initial pressure drop low. You'll find it in pre-filtration or final filtration stages, where the job is to protect high-pressure pumps and injectors from abrasive wear.

What sets this tube apart is its length: 752 mm, against the industry standard of 300–400 mm. That extra length nearly doubles the effective surface area (roughly 0.15 m² on a 63.5 mm OD), which cuts face velocity substantially for a given flow. More surface means more room for particles. We measured dirt-holding capacity at 3.0–3.8 grams of ISO 12103-1 test dust – about double what a short cartridge can handle. In practice, that translates into 500–800 operating hours between cleanings, versus 200–400 for shorter elements. For generator sets and marine engines, where unplanned stops are expensive, that longer service interval is a real operational advantage.

Length isn't the only thing. Spherical powder gives us even pore distribution along the whole tube, so flow doesn't channel in one spot – that helps avoid early local blockage. The bronze alloy holds up at 250 °C continuous service, and you can back-flush or ultrasonically clean it repeatedly. Put it together: long body, high storage capacity, and cleanability. This tube is a solid choice for high-flow, long-cycle, heavy-duty fuel filtration – and it's not something you'll find in every standard catalog.

Products Specifications

Parameter	Value
Base material	Copper-alloy spherical powder (CuSn system)
Filtration rating	5 μm (absolute, validated per bubble-point test)
Outside diameter	63.5 mm (±0.2 mm)
Overall length	752 mm (±0.5 mm)
Porosity (volumetric)	30% – 40%
Manufacturing process	Isostatic or gravity sintering under inert atmosphere
Max. continuous operating temperature	250°C (482°F)
Max. recommended differential pressure	0.7 MPa (7 bar) for routine service

Product Key Design Features

Extended Filtration Surface

More surface area comes from the longer element design. That lowers the fluid velocity through the media, which reduces pressure drop and lets the tube run longer between maintenance stops.

Uniform Sintered Porous Structure

The sintered powder forms a consistent pore network from end to end. Particles are captured evenly across the whole element – no weak spots, no localized plugging that shortens service life.

Copper-Alloy Construction

The copper-tin body handles high temperatures, corrosive fuel components, and mechanical wear. It runs continuously at 250°C and resists sulfur compounds and organic acids found in diesel and biodiesel. Material degradation is rarely the reason these tubes get replaced.

High Structural Integrity

The rigid sintered construction maintains dimensional stability during operation and cleaning processes, helping to ensure long-term durability and repeated use.

Performance Characteristics

● Mechanical Strength

The sintered copper-alloy body does not deform under rated differential pressure. In practice, the instantaneous reverse-pressure pulses during back-flushing do not cause collapse or end-cap detachment. For installations on the pump discharge side (high-pressure side), no additional reinforcement is needed.

● Filtration Stability

Pore channels are fixed during sintering and do not expand or migrate over time. This means filtration performance remains consistent from first use to replacement – you don't get high efficiency at the start and a gradual drop-off later. For systems where outlet cleanliness must stay within a narrow band over long periods, this consistency is often more important than the initial rating number.

●Temperature Resistance & Thermal Conductivity

Continuous operating temperature is rated up to 250°C. In real terms, this covers fuel return temperatures on boosted diesels and rapid heat-up after cold starts – no softening, no surface oxidation spalling. The thermal conductivity also helps spread localised heat, so you don't get accelerated gum or varnish deposits in hot spots.

● Corrosion Resistance

The copper-tin alloy has inherent passivation against sulphides, organic acids, and dissolved water found in most fuels. In practice, corrosion-related failures are far less common than mechanical wear or plugging – and that holds even for biodiesel blends, as long as water content stays within fuel specification limits.

● Cleanability

The rigid sintered structure allows reverse-flushing or ultrasonic cleaning to recover a useful portion of flow capacity. How well cleaning works depends on what's blocking it: hard particles (rust, dust) flush out fairly easily; gum or asphaltene deposits need solvent soaking. In most applications, 3–4 cleaning cycles still give acceptable pressure drop; beyond that, replacement usually makes more economic sense.

● Pressure Drop Profile

Clean pressure drop is low – under 0.03 MPa in clean condition – and the rise rate is steady. The rise is driven mainly by upstream contaminant loading, not by the element itself. That means you can use pressure drop readings as a real-time indicator of fuel system cleanliness, giving you a maintenance signal long before any failure occurs.

Typical Applications

Marine Main and Auxiliary Engines

Catalyst fines and rust particles are common in bunkered fuel-they come from the refining process and from storage tank corrosion during transit. In a common-rail system, those hard particulates wear injector seats and pump plungers over time. This tube goes in the final filter housing, right before fuel reaches the high-pressure pump. It stays in place for the full voyage, delivering the same 5-micron cut from departure to arrival. That keeps both the main engine and the auxiliary set running without fuel-related stops.

Locomotives and Heavy Construction Equipment

These are big machines with big tanks, and fuel often sits in them for weeks. During that time, condensation adds moisture, and dust or sand finds its way in during refuelling. This element mounts on the supply side, where it catches rust flakes from the tank interior and any grit introduced during filling. Remove those abrasives before they reach the pump and injectors, and you reduce scoring on plungers and needle valves. Less wear in the fuel system means fewer unscheduled repairs trackside or on site.

Generator Sets (Stationary and Mobile)

Generator sets require an uninterrupted fuel supply-any unplanned outage translates directly into power loss or insufficient backup capacity. This filter tube is used in the final filtration stage of diesel generator fuel systems. The plain end faces fit standard housings, allowing drop-in replacement of existing elements without piping modifications. It meets the filtration demands within regular service intervals, reducing the risk of clogging-related trips.

Fuel Polishing Skids

This filter tube serves as the final polishing stage on fuel conditioning skids, capturing residual particulates that pass upstream coalescers, centrifuges, or dehydrators. The 5 μm rating meets the cleanliness requirements for most diesel polishing applications. Plain end faces are compatible with standard housing configurations, simplifying spare parts stocking and replacement for existing skid systems.

Cleaning & Maintenance

The sintered bronze element is cleanable-that's what sets it apart from disposable media. Two methods have proven effective in field practice:

Back-flushing
Direct clean fuel or solvent through the element in the reverse direction, keeping pressure under 0.3 MPa. This removes the surface cake and some of the particles trapped in the outer pore layers. In most cases, it restores 60–70 % of the initial pressure drop.

Ultrasonic cleaning
Immerse the element in a hydrocarbon solvent and apply 25–40 kHz ultrasound. This dislodges sub-micron particles embedded deep in the pore structure. Recovery typically reaches 85–90 % of the original flow capacity.

In practice, we recommend evaluating pressure-drop recovery after every 3–4 cleaning cycles. If the post-backflush pressure drop still exceeds 1.5 times the clean-element value, the pore structure has shifted beyond its useful life. At that point, replacement becomes more cost-effective than further cleaning.

FAQ

01.Can this filter tube be used with biodiesel?

Yes. The bronze alloy is compatible with biodiesel blends from B20 up to B100. We have run immersion tests at 80°C for 1,000 hours – no measurable weight loss or change in pore size was observed.

02.Can you supply other lengths or diameters?

Yes. In addition to the standard 752 mm length, we can produce tubes from 300 mm up to 1,000 mm, and the end configuration can be machined to your drawing. Minimum order quantity and lead time depend on the specific size – please ask when you enquire.

03.How do I know when the element needs cleaning?

Fit a differential pressure gauge across the filter housing. We recommend scheduling a cleaning when ΔP reaches 0.5 MPa. At 0.7 MPa, action is required – beyond that point the bypass valve may open, allowing unfiltered fuel to pass through.