DN25 / 1" Manual Wedge Wire Filter – Up to 3.5 m³/h
The FSC-50M is a compact DN25 / 1" BSP manual wedge wire filter for industrial liquid filtration with a reference flow capacity of up to approximately 3.5 m³/h. It uses a reusable stainless-steel wedge wire element and manually operated scraper cleaning, eliminating the need for routine replacement of disposable filter bags or cartridges.
The FSC-50M is intended for lower-flow process applications where a simple, mechanically robust filtration system is preferred over a fully motorised self-cleaning filter. Typical liquids include water, paints, coatings, inks, adhesives, resins, oils, lubricants, emulsions and solvents.
Flow reference: approximately 3.5 m³/h is specified for water at approximately 100 µm. Actual capacity depends on viscosity, solids loading, filtration rating, pressure drop and process conditions.
DN25 / 1" FSC-50M technical specifications
| Filter type | Manually cleaned scraper-type wedge wire filter |
|---|---|
| Inlet connection | 1" female BSPP / DIN ISO 228 G |
| Outlet connection | 1" female BSPP / DIN ISO 228 G |
| Nominal connection size | DN25 / 1" |
| Drain connection | ¾" BSPP |
| Vent connection | 1/8" BSPP |
| Maximum reference flow | Approx. 3.5 m³/h at 100 µm with water |
| Available filtration ratings | 25–3000 µm |
| Operating pressure | 0–16 bar |
| Operating temperature | +10 °C to +80 °C standard |
| Filter surface area | Approx. 240 cm² |
| Housing volume | Approx. 1.5 litres |
| Filter head | Stainless steel 1.4301 |
| Lower housing | Stainless steel 1.4404 / 1.4571 |
| Wedge wire filter element | Stainless steel 1.4404 |
| Internal components | Stainless steel 1.4301 |
| Scraper blade | Stainless steel 1.4310 |
| Sealing materials | Viton / FKM and PTFE; alternative materials available depending on application |
| Housing closure | Clamping-ring design for maintenance access |
| Pressure equipment | Manufactured in accordance with PED 2014/68/EU Article 4(3) |
| Manufacturing | Manufactured in the European Union |
How does the DN25 manual wedge wire filter work?
Process liquid enters the housing through the 1-inch connection and flows through the cylindrical wedge wire filter element from outside to inside. Suspended particles larger than the selected slot opening remain on the external surface of the screen.
Unlike the motor-driven FSC models, the FSC-50M uses manual scraper cleaning. Operating the manual cleaning mechanism moves the wedge wire element relative to the scraper blade, mechanically removing accumulated contamination from the filter surface.
The removed solids collect in the lower part of the filter housing and can be discharged through the ¾-inch drain connection using the available pressure inside the system.
When should a manual wedge wire filter be used?
A manually cleaned wedge wire filter is particularly useful when the solids loading is moderate, cleaning is required only periodically and the additional complexity of an electric drive and automatic control system is not necessary.
- Lower-flow industrial liquid filtration
- DN25 / 1-inch process piping
- Applications with intermittent rather than continuous screen cleaning
- Installations where electrical power at the filter is undesirable or unnecessary
- Processes requiring a reusable stainless-steel filter instead of disposable media
- Compact filtration installations with limited available space
25 to 3000 micron DN25 wedge wire filtration
The FSC-50M can be supplied with precision wedge wire elements from approximately 25 to 3000 µm.
- 25 µm
- 50 µm
- 100 µm
- 250 µm
- 500 µm
- 1000 µm
- 3000 µm
The filtration rating influences both particle retention and hydraulic capacity. A 25 or 50 µm element generally produces a higher resistance to flow than a 100, 250 or 500 µm configuration, particularly with viscous liquids or elevated solids concentrations.
DN25 filtration up to 16 bar
The FSC-50M is suitable for operating pressures from 0 to 16 bar, making the compact unit suitable for many pressurised industrial process systems.
Maximum permitted pressure should always be considered together with process temperature, liquid properties, seal material and the pressure rating of connected piping and valves.
Stainless-steel construction for industrial liquids
The filter combines stainless-steel process-contact components with a reusable 1.4404 wedge wire screen.
- Filter head: stainless steel 1.4301
- Lower housing: stainless steel 1.4404 / 1.4571
- Internal components: stainless steel 1.4301
- Wedge wire element: stainless steel 1.4404
- Scraper blade: stainless steel 1.4310
- Viton / FKM and PTFE sealing components
Seal compatibility should be checked against the specific liquid, concentration, temperature and operating conditions before final selection.
Compact manual scraper-filter design
The FSC-50M combines a compact stainless-steel housing with approximately 240 cm² of reusable filtration area and a housing volume of only approximately 1.5 litres.
- 1" BSPP / DN25 process connection
- 240 cm² wedge wire filtration surface
- Manual mechanical scraper cleaning
- Outside-to-inside liquid flow
- Integrated lower solids-collection section
- ¾" drain connection
- 1/8" vent connection
- Clamping-ring housing closure for maintenance access
Cleaning and solids discharge
The screen is cleaned mechanically by operating the manual scraper mechanism. Removed solids move away from the active filtration surface and collect in the lower housing section.
In the standard manual arrangement, accumulated contamination can be discharged by opening the drain valve. Depending on the installation, the drain function can also be integrated into a more automated process arrangement if required.
Typical DN25 manual wedge wire filter applications
- Industrial and process water
- Paints and coatings
- Emulsion paints
- Printing inks
- Adhesives and resins
- Industrial oils and lubricants
- Cooling lubricants
- Emulsions
- Solvents
- Polyurethane process liquids
- Plasticizers and similar fluids
- Electrophoretic coating processes
Benefits of a manual DN25 wedge wire filter
- No electric gear motor required for scraper cleaning
- Reusable stainless-steel filter element
- No routine disposable cartridge or filter-bag replacement
- Operating pressure up to 16 bar
- 25–3000 µm filtration range
- Compact 1" / DN25 process connection
- Simple mechanical design
- Low internal volume and limited product loss during discharge
- Easy housing access for inspection and maintenance
How to select a DN25 manual wedge wire filter
The nominal 3.5 m³/h capacity is only a reference value. Correct filter selection should consider the actual process conditions.
- Required process flow in m³/h
- 1" / DN25 connection requirements
- Required filtration rating in µm
- Liquid viscosity
- Solids concentration
- Particle size, shape and behaviour
- Operating pressure
- Operating temperature
- Chemical and seal compatibility
- Required cleaning frequency
Manual or automatic self-cleaning filtration?
The FSC-50M is intended for applications where periodic manual scraper cleaning is sufficient. For processes requiring automated cleaning, compare this model with the motor-driven FSC self-cleaning filter range.
DN25 manual wedge wire filter FAQ
What flow rate can the FSC-50M handle?
The FSC-50M has a maximum reference flow of approximately 3.5 m³/h when filtering water at approximately 100 µm. Actual flow depends on viscosity, solids loading, selected micron rating and process conditions.
What connection size does the FSC-50M use?
The standard process connection is 1-inch female BSPP, corresponding approximately to DN25 nominal pipe size.
How is the FSC-50M cleaned?
The filter uses a manually operated mechanical scraper. Operating the cleaning mechanism removes deposited solids from the outer surface of the reusable wedge wire filter element.
What micron ratings are available?
Wedge wire elements are available from approximately 25 to 3000 µm, including common ratings such as 25, 50, 100, 250, 500, 1000 and 3000 µm.
What pressure can the manual DN25 filter handle?
The FSC-50M is designed for operating pressures from 0 to 16 bar. Final suitability also depends on temperature, process fluid and sealing configuration.
What is the filtration area of the FSC-50M?
The filter provides approximately 240 cm² of reusable wedge wire filtration surface.
What is the difference between FSC-50M and an automatic self-cleaning filter?
The FSC-50M uses manual mechanical scraper cleaning. Automatic FSC filters use a powered drive to perform the cleaning cycle and can be integrated with timed or differential-pressure-based controls.
Is the FSC-50M manufactured in the EU?
Yes. The filter is manufactured in the European Union and is manufactured in accordance with PED 2014/68/EU Article 4(3).
When should I choose the manual FSC-50M?
The manual model is most suitable when process flow is relatively low, solids accumulation is moderate and periodic manual cleaning is acceptable. For frequent or fully automatic cleaning, a motor-driven FSC model is generally more appropriate.