Washable Cartridge Filter (PP / SS 304)

Name: Washable Cartridge Filter (PP / SS 304)
Brand: Prosestim

Washable Mesh Construction, Long-Lasting Filtration Performance

Washable cartridge filter: a cartridge with a PP or SS 304 mesh surface on a PP frame that is cleaned and reused. In the 50–300 µm range, it cuts consumable costs with more than 500 wash cycles.

Different Combinations

Wide Filtration Range

50–300 µm

Wash Cycle Durability

500+

Two Mesh Surface Options

PP / SS 304

Washable Cartridge Filter (PP / SS 304)

Product Identity and Technical Summary Panel

The Washable Cartridge Filter (PP / SS 304) family is a reusable filtration element that separates coarse solids such as sand, rust and sediment in liquid lines. Every variant is checked for dimensions, sealing and accuracy of the mesh opening before shipment.

The series combines nominal precision grades from 50 to 300 microns with two different mesh materials. This means the same cartridge form can be used in different environments, from domestic and agricultural water lines to industrial cooling circuits and chemical and food processes. The common PP body stays the same; only the surface material and mesh opening change. Different fluids can thus be handled without changing the filter housing standard.

Three parameters determine the choice of variant: the mesh opening sets the particle size to be retained, the mesh material the temperature and chemical resistance, and the gasket and connection type the leak-tight seating in the housing. If any one is chosen wrongly, the cartridge loses its efficiency after washing or even bypasses. That is why the type, temperature and particle profile of the fluid should be considered together before the micron rating.

Washable PP Cartridge Filter with Gasket

PP washable cartridge filter, 222 O-ring flat end — Washable Cartridge Filter – 222 O-Ring Flat End

PP washable cartridge filter, 226 O-ring — Washable Cartridge Filter – 226 O-Ring Flat End

Heat-Resistant Washable PP Cartridge Filter with Gasket

Key Technical and Structural Features

Filter Media: PP Frame + PP Woven Mesh
SS 304 Stainless Steel Mesh
Thermally Welded Hybrid Construction
Filtration Range: 50 µm – 300 µm nominal; standard precision with both mesh surface options.
Filter Lengths: 5" (127 mm)
10" (254 mm)
20" (508 mm)
Industrial Process Housing Options
Operating Compatibility: PP Mesh: Water Treatment, Irrigation and Cooling
SS 304 Mesh: Chemicals and Petrochemicals
Heat-Resistant Model: High Temperatures
Construction Type: Rigid PP inner core, thermally welded mesh surface; low pressure loss and high flow.
Maintenance & Savings: Manual Washing with Water
Reverse Flow
Cleaning with Compressed Air
Connection Types: DOE (gasket), 222 O-ring and 226 O-ring connections; compatible with standard cartridge filter housings.
Quality Control: Hydrostatic pressure, micron precision verification, food-grade approval and corrosion resistance testing.

Liquid Flow Performance per 10"

Initial Pressure Drop - Chart Data Points 10" cartridge · ΔP by micron grade · Water @ 20 °C

#	50 µm	100 µm	300 µm
1	6 L/min0.02 bar	9 L/min0.01 bar	16 L/min0.01 bar
2	12 L/min0.05 bar	18 L/min0.02 bar	30 L/min0.02 bar
3	18 L/min0.10 bar	27 L/min0.03 bar	43 L/min0.04 bar
4	24 L/min0.15 bar	36 L/min0.06 bar	57 L/min0.07 bar
5	30 L/min0.20 bar	45 L/min0.09 bar	70 L/min0.10 bar

Values are initial differential pressure (ΔP) values measured on a 10" clean cartridge with water @ 20 °C. Source: Industrial test and operational flow data.

50 µm

100 µm

300 µm

Water Flow Rate Performance

Washable cartridge filters are designed with surface filtration technology to offer minimal resistance to fluid flow. The pore structure, fixed by thermal fusion, keeps the initial differential pressure (ΔP) to a minimum on high-flow lines and ensures system stability. PP mesh improves energy efficiency with a low ΔP, while SS 304 mesh maintains the same hydraulic stability under high-pressure conditions. The test data below show the pressure-flow characteristics of both series on a 10″ basis.

Performance Advantages in Water Filtration

Filtration Architecture and Working Principle

Unlike single-use depth filters, washable cartridge filters are built on a surface filtration and reusability architecture. In both series, the liquid passes through the mesh surface from outside to inside; coarse particles and sediment are retained on the outer surface while clean fluid leaves through the inner channel. The mesh material is chosen as PP or SS 304 according to operating conditions.

STEP 01

A Washable Mesh Solution for High-Flow Lines

Instead of trapping particles in inner layers, washable cartridges hold them on the mesh surface. Accumulated dirt is removed by manual washing or compressed air; chemical cleaning can also be applied to SS 304 models. With a precision range of 50–300 µm, they provide long-lasting, uninterrupted protection on high-flow lines.

PROCESS BENEFIT The washable mesh structure lets the cartridge be cleaned and reused many times. Because dirt is not embedded in the depth of the media, a simple wash is enough and the cartridge returns to the line quickly. Single-use cartridge consumption, stock levels and waste disposal costs fall significantly.

STEP 02

Rigid Polypropylene Body and Chemical Resistance

The mesh surface is fixed to a rigid 100% pure polypropylene frame by thermal welding; no adhesives or chemical binders are used. The frame keeps its form at high differential pressure and through repeated wash cycles; the mesh opening does not change, and the cartridge continues to work at the same micron rating after every wash. With a PP frame and PP or SS 304 mesh, it offers wide chemical resistance with water-based fluids and dilute acids and bases.

PROCESS BENEFIT The rigid polypropylene body prevents the mesh structure deforming and the pore opening changing at high differential pressure. Because it contains no chemical binders, it releases no extractables into the process. The stated retention rating therefore stays constant through repeated washing, and process safety is maintained.

STEP 03

Low Pressure Drop and Cylindrical Flow Geometry

The cylindrical structure of washable cartridges distributes fluid evenly over the filter surface; differential pressure stays low compared with equivalent depth filters. The open surface area of the mesh reduces flow resistance. The pressure difference that rises with contamination gives a direct signal for cleaning time; filter life is extended and maintenance time shortened.

PROCESS BENEFIT Low pressure drop reduces the energy the pump uses to maintain the same flow and allows a smaller housing on high-flow lines. The pressure difference that rises as dirt builds up makes it possible to plan cleaning in advance, also reducing the risk of unplanned downtime.

Filter Media and Structural Engineering Design

Washable cartridge filters offer high mechanical strength, long service life and low operating costs for industrial applications that need reusable filtration. They are made with high-strength thermal fusion technology, with PP woven mesh or SS 304 stainless steel mesh surface options on a 100% pure polypropylene frame, without adhesives, resins or binders.

Both series work on the surface filtration principle, retaining sand, sediment, rust, metal particles and other solids on the mesh surface. Particles that do not penetrate the depth of the filter media are easily removed by manual washing or compressed air, so the cartridge can be reused.

PP Mesh filters offer an economical solution especially for water filtration and general particle retention, while SS 304 Mesh filters are preferred in processes requiring higher mechanical strength. Under suitable conditions, the SS mesh structure is also suitable for chemical cleaning and sterilisation.

Reusable for up to 500+ wash cycles with correct cleaning and operating conditions, these filters reduce cartridge change frequency and consumable costs while also cutting filter waste, giving a more sustainable filtration solution.

Parameter	Value
Filter Media	PP Mesh: 100% Virgin Polypropylene Mesh (suitable for food contact) SS 304 Mesh: Stainless Steel Woven Mesh
Filtration Range	50 µm, 60 µm, 80 µm, 100 µm, 150 µm, 200 µm, 250 µm, 300 µm
Support Structure	Internally Reinforced Rigid Polypropylene Core
O-Ring / Gasket	Silicone, NBR / EPDM
End Cap Type	DOE (gasket), 222 O-ring, 226 O-ring
Outer Diameter (Standard)	60–70 mm (International Filter Housing Compatibility)
Outer Diameter (Big Blue)	110–115 mm
Inner Diameter	28–30 mm
Standard Lengths	5", 10", 20"
Big Blue Lengths	10", 20"

Physical Construction and Effective Filtration Volume

PP and SS 304 mesh washable cartridge filters offer a high-strength filtration architecture with a PP or SS 304 mesh surface option on a rigid 100% pure polypropylene frame. The rigid body design, made in lengths of 5″, 10″ and 20″, fully resists pressure fluctuations and reduces the risk of bypass. The optimised pore geometry gives maximum particle capture efficiency at the surface, while the easy-to-clean design reduces cartridge replacement costs. In both mesh series, the PP frame keeps its structural integrity in high-flow processes for stable flow performance.

Filter Length	Application and Flow Efficiency	Construction and Maintenance
5"	Compact systems and narrow filter housing bodies	PP Mesh or SS 304 Mesh Manual Cleaning
10"	Standard domestic and industrial pre-filtration	PP Mesh or SS 304 Mesh Manual Cleaning
20"	Medium-scale commercial flow management	PP Mesh or SS 304 Mesh Manual Cleaning

Chemical Compatibility Guide

The washable cartridge filter is a washable cartridge solution with a PP main body that can be used with PP mesh or stainless steel mesh filtration surfaces. Chemical resistance can vary depending on the mesh material and the type, temperature, concentration, pH and contact time of the process liquid. The tables below compare the general compatibility of the PP mesh and 304 stainless steel mesh options with water-based and inorganic process chemicals and in organic solvent and hydrocarbon environments. For the final choice, actual process conditions and the gasket material must be considered together.

E: Excellent · G: Good · F: Fair · P: Poor · N/R: Not recommended

Water and Inorganic Chemicals

Chemical Group	Example Chemical	PP	304 SS
Water and Process Water	Mains water, process water, DI water, purified water	E	E
Saline and Seawater	NaCl solutions, seawater	E	F
Hot Water and Steam	Hot process water, steam applications	G	E
Alkaline Solutions	NaOH, KOH and caustic-based chemicals	E	G
Acidic Environments	Acetic, citric, phosphoric, sulphuric and nitric acid	F	F
Oxidising Chemicals	Hypochlorite, free chlorine, hydrogen peroxide	F	N/R

Operating Conditions

The resistance values of washable cartridge filters vary with the chosen mesh type. PP mesh suits water-based and general process lines at moderate temperatures; SS 304 mesh suits processes with higher mechanical stress and frequent washing. In the table, the nominal temperature is the recommended value for continuous operation and the maximum temperature is the upper limit that must not be exceeded. The pressure limit in reverse flow is lower than in normal flow, so backwashing must be done with this value in mind. All values apply to standard gasket materials; limits may change if a different gasket is chosen.

Nominal Operating Temperature (PP Mesh): 60 °C (140 °F)
Maximum Operating Temperature (PP Mesh): 80 °C (176 °F)
Maximum Operating Temperature (SS 304 Mesh): 80 °C (176 °F): standard model, limited by the PP frame; higher with the heat-resistant model
Maximum Differential Pressure (Normal Flow): 2.5 bar @ 30 °C
Maximum Differential Pressure (Reverse Flow): 2.1 bar @ 25 °C
pH Compatibility (PP Mesh / SS 304 Mesh): 1–14

Sealing and Connection Components

The washable cartridge filter can be made with different end cap and sealing options to suit the filter housing connection and process conditions. Besides standard gasket models, 222 O-ring and 226 non-locking O-ring connection options can also be applied. The gasket or O-ring material is chosen according to the chemical nature of the process liquid, temperature, pressure and sealing requirements.

End Caps and Closures

On the washable cartridge, the end caps are bonded to the PP frame by thermal fusion. Because the cartridge is removed and refitted at every cleaning, the connection must provide the same seal every time. The series uses DOE (gasket), 222 O-ring and 226 O-ring end caps; the right end cap is chosen to suit the seat in your existing filter housing.

Engineering Advantage for Process Safety

Secure Connection Design
High Mechanical Strength
Process Sealing Support
Stable Operation Under Pressure
Chemical and Thermal Compatibility
Long Service Life

PP washable cartridge filter with 222 O-ring flat end — 222 O-Ring Flat Cap

PP washable cartridge filter with 226 O-ring flat end — 226 O-Ring Flat Cap

O-rings

On a washable cartridge, the O-ring reseats in its groove at every cleaning cycle. A material that keeps its flexibility and is compatible with the process fluid must therefore be chosen. The series offers silicone and NBR / EPDM O-ring options: silicone is preferred for drinking water and food lines, NBR / EPDM for general water and process lines. Check the O-ring at every wash and replace it if necessary.

High-Performance O-Ring Solutions for Process Safety

Gaskets

On gasket (DOE) washable cartridges, the gasket presses both ends of the cartridge leak-tight against the filter housing. Silicone and NBR / EPDM gasket options are chosen according to the type and temperature of the fluid; after every wash, check that the gasket is in place and undamaged.

Gasket Solutions That Safeguard Filtration Efficiency

Teflon (PTFE) flat gasket — Silicone Gasket

Industry Applications

The washable cartridge filter can be used in many industries, including water treatment, chemicals, food, paint, coatings, oils, industrial washing and general process filtration. With PP mesh or SS 304 mesh options, it adapts to different fluids and process conditions; its washable design gives long-lasting, economical and sustainable filtration performance.

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Cleaning, Disinfection and Backwashing

Cleaning and backwashing of washable cartridge filters are carried out to remove the particle load accumulated on the filtration surface in a controlled way and to preserve the cartridge’s reusability. Thanks to its PP body and PP mesh or SS 304 mesh filtration surface, the product is designed to withstand rinsing with hot water, suitable chemical disinfection and backwashing in the reverse flow direction.

In standard applications, hot water cleaning and chemical disinfection methods suited to process conditions should be used instead of steam sterilisation. For the PP mesh option the temperature limit is assessed against the resistance of the PP material, while for the SS 304 mesh option, although it offers higher thermal resistance, the cartridge’s PP body and end cap construction must be taken into account. Backwash performance varies with particle type, contamination load, flow direction, differential pressure and the gasket material used.

Cleaning / Disinfection Parameter	PP Mesh	SS 304 Mesh
Rinsing with Hot Water	Suitable	Suitable
Recommended Cleaning Temperature	40–60 °C	40–60 °C
Maximum Hot Water Contact	80 °C	80 °C*
Chemical Disinfection	Suitable	Suitable
Reverse Washing / Backwashing	Suitable	Suitable
Maximum Reverse Flow Pressure	2.1 bar @ 25 °C	2.1 bar @ 25 °C
Steam Sterilisation	Not recommended	Custom-Made / Controlled
Maintenance / Replacement Criterion	ΔP increase, deformation and cleaning efficiency	ΔP increase, deformation and cleaning efficiency

TECHNICAL ASSESSMENT BASED ON FIELD EXPERIENCE

Engineer's Note

Washable Surface Filtration and Operational Sustainability

Thanks to their smooth surface and precision mesh technology, our washable filters hold particles on the outer surface instead of trapping them in depth, so they are easy to clean. In our field experience, choosing this technology instead of depth filters for fluids with high particle loads such as coarse sediment and sand significantly reduces operational downtime. To maintain system efficiency, we recommend starting the cleaning cycle when the differential pressure (ΔP) reaches its threshold.

When should it be chosen?

In coarse particle filtration, in processes that need sand and sediment retention, in pre-filtration stages protecting the main filtration unit, and in recovery projects aiming to lower the total cost of ownership (TCO).

Critical Warning Avoid abrasive chemicals during washing so the mesh structure is not damaged. During installation of DOE models, make sure both end gaskets of the cartridge seat fully in the housing seats; incorrect installation directly affects filtration precision.

Application and Selection Criteria

Low TCO and Long Service Life: Unlike single-use cartridges, they can be washed and reused many times, significantly lowering annual filter operating and consumable costs.
Differential Pressure (ΔP) and Washing Interval: When the inlet–outlet differential pressure (ΔP) reaches its threshold, plan backwashing or manual cleaning to maintain line flow and avoid straining the media.
Sealing and Food-Compatible Lubricant: To preserve the flexibility and sealing life of gaskets and O-rings, always use food-compatible pure silicone grease instead of mineral oils during maintenance.
Micron Selection by Particle Profile: Choose the micron rating according to the smallest particle size to be retained. A mesh finer than necessary clogs faster, increases washing frequency and reduces line flow.

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Washable Cartridge Filter (PP / SS 304)

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Your Questions Answered

Frequently Asked Questions

At Prosestim, we are committed to answering your questions and providing technical support for our filtration solutions.

What is the difference between PP mesh and SS 304 mesh cartridge filters?

PP mesh cartridges are lightweight and chemically compatible with a wide range of fluids; they are preferred with acids, bases and water-based fluids. SS 304 mesh cartridges are used with fluids that exceed PP mesh’s resistance limits, such as aromatic hydrocarbons, and under higher mechanical stress. On lines that require high temperatures, the heat-resistant model should be chosen. In saline and seawater applications, SS 304 shows moderate resistance to chloride corrosion, while PP performs well in these environments.

How many times can a washable mesh cartridge filter be washed?

The number of cleaning cycles depends on the fluid’s contaminant load and the cleaning method used. In the PP mesh series, mechanical integrity is maintained even after 500 wash cycles. In the SS 304 series, this value is higher with chemical cleaning cycles. Deformation of the mesh or broken wires are the main indicators for replacement timing.

What is the difference between a mesh cartridge filter and a melt-blown cartridge filter, and which should I choose?

A mesh cartridge performs surface filtration; it holds contaminants at the surface, is washed and reused. It works in the 50–300 µm range and suits coarse particle and sediment removal. A melt-blown cartridge performs depth filtration; it traps contaminants inside the media, is single-use and works in the 1–150 µm range. Mesh is preferred for pre-filtration or coarse particle applications; melt-blown is needed for fine filtration and high-purity applications.

Up to what temperature can a PP mesh cartridge filter withstand?

The nominal operating temperature of a PP mesh cartridge is 60 °C and the maximum operating temperature is 80 °C. Because the frame in standard models is polypropylene, the upper limit for SS 304 mesh is also 80 °C. For higher temperatures, the heat-resistant model is used; on lines with steam, a fully stainless steel cartridge filter should be used.

Which housings is the mesh cartridge filter compatible with?

PP and SS 304 mesh cartridges are compatible with standard 10″, 20″ and Big Blue filter housings. They fit standard housings with DOE (gasket), 222 O-ring and 226 O-ring connection options. For special lengths or connection requirements, manufacturer approval is recommended.

Should I choose a silicone or an NBR gasket?

Silicone gaskets are preferred for food, drinking water and pharmaceutical lines and are suitable for food contact. NBR (black) gaskets are used for oil, fuel and hydrocarbon-based fluids. Choosing the wrong gasket leads to loss of sealing and a risk of contamination. The fluid’s chemical nature and temperature are the deciding criteria.

When should a washable mesh filter be replaced?

If the differential pressure does not return to its initial value after washing, the cartridge should be replaced. Replacement is also mandatory if broken wires, deformation or permanent clogging of the mesh surface are found during visual inspection. Under normal conditions, a visual check every 6–12 months is recommended; in applications with a high contaminant load, this schedule should be shortened.

In which applications is a mesh cartridge filter not used?

A mesh cartridge is not adequate for applications requiring filtration below 50 µm; a melt-blown or pleated cartridge should be chosen instead. It is also not suitable for high-viscosity fluids or systems that exceed the cartridge’s flow capacity. PP mesh is incompatible with chlorinated solvents; for these environments, SS 304 or a chemically resistant alternative medium should be chosen.

How much does a washable mesh filter save compared with a single-use filter?

A washable mesh cartridge gives significant savings in cartridge costs compared with a single-use filter. Savings are highest on coarse particle pre-filtration lines with a high contaminant load that need frequent changes. Because the same cartridge can be used for 500+ wash cycles, annual filter consumable costs fall significantly; downtime and labour costs for change-outs are also reduced.

Can PP mesh cartridges be used on food and drinking water lines?

PP mesh cartridges, made with thermal fusion technology free of adhesives or chemical binders, can be used on food and drinking water lines when made from raw material suitable for food contact. Silicone (white) must be chosen as the gasket material. Depending on the application, EC 1935/2004 and USP Class VI requirements must be documented by the manufacturer.

Box Dimensions

335 × 410 × 560 mm: Capacity: 30 pcs per carton for 20" / 60 pcs per carton for 10".

Shipping Note: 10-inch cartridge filters are shipped securely in 20-inch boxes, packed in two layers.

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Washable Cartridge Filter (PP / SS 304)

Variation Type: Plastic Mesh PP Washable Cartridge Filter

Filter Length: 5 Inch

Micron Rating: 50 Micron

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