Pressure Leaf Filter
Pressure Leaf Filter is a MS/SS Vertical / Horizontal Vessel with Filter Leaves inside. The leaves are mounted vertically on a common manifold pipe, through which the filtered liquid flows out. On the top, the leaves are held by a vibrating shaft. A mechanical vibrator driven by electric motor/pneumatic vibrator is provided for vibrating the leaf shaft for cake discharge. Jacket for hot filtration can be offered if desired overflow, vent/steam/air charging, pressure gauge & safety valve are provided on the top.
The SEPARATECH Pressure Leaf Filter is an advanced, fully enclosed liquid-solid separation system engineered for high-precision clarification and filtration. Designed as a sustainable and automated alternative to traditional plate and frame filter presses, it completely eliminates the need for consumable filter cloths, drastically reducing operating costs and labor intensity.
Operating under pressure, the Pressure Leaf Filter series guarantees a completely sealed environment, making it the premier choice for processing hazardous, volatile, toxic, or high-purity substances. With both dry and wet cake discharge options available, our pressure leaf filters maximize filtration surface area within a remarkably compact footprint.
Two Core Configurations: Vertical vs. Horizontal Pressure Leaf Filters
Depending on your plant’s footprint constraints, required filtration area, and cake volume, we offer two distinct pressure vessel configurations:
Vertical Pressure Leaf Filter (VPLF)
- Best For: Plants with limited floor space but ample overhead clearance.
- Filtration Area: Typically ranging from 2 m^2 to 120 m^2.
- Discharge Method: Dry cake discharge via a heavy-duty pneumatic vibrator connected to the top leaf assembly, dropping the solid cake through a large bottom butterfly valve.
Horizontal Pressure Leaf Filter (HPLF)
- Best For: High-capacity processing lines requiring a massive filtration area (up to 300 m^2) or large cake volumes.
- Design Advantage: Features a hydraulic shell-retraction or bundle-retraction system. The entire internal filter leaf assembly is exposed horizontally, making inspection and wet/dry cake discharge incredibly easy.
Premium Pressure Leaf Filter Elements & Leaf Screens
The core of any leaf filter’s performance lies in its filtration media. SEPARATECH manufactures high-engineered pressure leaf filter elements designed to fit not only our own units but also standard industry brands.
- Multi-Layer Mesh Construction: Standard 5-layer or 7-layer stainless steel wire mesh designs (SS304, SS316L, 904L, or Hastelloy).
- Robust Frame Design: Heavy-duty riveted or bolted side profiles ensure the filter leaves remain perfectly flat under high pressure, preventing distorting and extending service life.
- High Precision: Available in various micron ratings to handle everything from crude oil pre-coating to fine chemical clarification.
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Vertical Pressure Leaf Filter
Learn More →: Vertical Pressure Leaf FilterSEPARATECH’s Vertical Pressure Leaf Filter (VPLF). Designed for space-limited plants, this automated system features clothless multi-layer stainless steel mesh screens and pneumatic vibration for efficient, eco-friendly dry cake discharge.
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Horizontal Pressure Leaf Filter
Learn More →: Horizontal Pressure Leaf FilterHorizontal Pressure Leaf Filter (shell or bundle retraction) features horizontal pressure vessel, filter leaves, pneumatic vibrator, bottom structure housing, hydraulic power pack for bonnet ring opening / closing and shell or bundle retraction.
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Pressure Leaf Filter Elements
Learn More →: Pressure Leaf Filter ElementsSEPARATECH’s premium Pressure Leaf Filter Elements. Engineered with durable multi-layer stainless steel wire mesh, precision replacement leaves provide universal compatibility, maximum corrosion resistance, and extended lifespans.
Engineering Breakdown: Turn-Key Filter Skid Systems & Automation
A complete industrial filtration line consists of more than just the pressure vessel. SEPARATECH specializes in designing fully integrated, automated skid-mounted systems that ensure continuous operation and seamless plant integration:
- Integrated Feeding & Slurry Tanks: Outfitted with specialized centrifugal pumps and agitators to maintain a completely uniform slurry suspension before it enters the filtration chamber.
- Advanced PLC Control Panels: Equipped with Siemens or Allen-Bradley PLC systems, enabling full automation of the pre-coating, filtration, cake washing, gas drying, and pneumatic discharge cycles with minimal human intervention.
- Pre-coating Piping & Instrumentation: Features precise pressure transmitters, automated switching pneumatic valves, and flow meters to lock in the absolute perfect filter aid layer thickness.
Sizing and Technical Specifications
| System Configuration | Filtration Area (m2) | Cake Volume (L) | Standard Leaf Material | Operation Mode |
|---|---|---|---|---|
| Vertical Series (VPLF) | 7 – 120 | 100 – 2800 | SS304 / SS316L | Fully Automated / Manual |
| Horizontal Series (HPLF) | 15 – 200 | 500 – 9000 | SS316L / 904L | Hydraulic Automated |
| Replacement Elements | Custom Sizing | Multi-layer Mesh | SS316L / Custom Alloy | Universal Retrofit |
Troubleshooting & Preventive Maintenance Guide
To maximize the lifespan of your leaf filter and ensure consistent filtrate clarity, SEPARATECH’s application engineers recommend implementing the following preventive protocols:
- Monitor Differential Pressure ( ∆p ): Always track the inlet and outlet pressure. A sudden jump in ∆p indicates a fully packed cake chamber that requires immediate drying and discharge cycles to avoid damaging the internal elements.
- Inspect Leaf Screen Alignment: During routine horizontal bundle retractions or vertical top cover openings, verify that all filter leaves are perfectly parallel and firmly locked into the bottom discharge manifold.
- Gasket Replacement Cycles: Inspect the main vessel head gasket after every major batch campaign. Even minor chemical scoring on the O-ring can lead to pressure drops and compromised atmospheric sealing.
Comprehensive Pressure Leaf Filter Parts & Maintenance Support
To minimize unscheduled downtime, SEPARATECH maintains a comprehensive inventory of genuine pressure leaf filter parts manufactured to strict OEM tolerances:
- Vessel Gaskets & Seals: High-temperature, chemical-resistant custom O-rings (Viton, EPDM, PTFE-encapsulated) to ensure the vessel remains hermetically sealed.
- Pneumatic Vibrators: High-frequency pneumatic vibrator assemblies designed to ensure complete, clean dry cake release.
- Filter Leaf Accessories: Replacement leaf nozzles, clamps, spacing rings, outlet manifolds, and clothless screen repair components.
- Automation Upgrades: PLC control panels, pneumatic butterfly valves, and pressure transmitters for automated retrofits.
Typical Applications Across Global Industries
Our integrated pressure leaf filtration solutions are widely deployed in the following critical processes:
- Edible Oils: Bleached oil, crude oil clarification, dewaxing, winterization, and nickel catalyst recovery.
- Chemicals & Petrochemicals: Molten sulfur, industrial brine filtration, plasticizers, resins, pigments, and organic acids.
- Sugar & Sweeteners: Sugar cane juice, glucose, corn sweeteners, syrups, and starch clarification.
- Pharma & Biotech: Extraction of active pharmaceutical ingredients (APIs), antibiotics, and fermentation broth clarification.
Consult with SEPARATECH Filtration Experts
Whether you are designing a brand-new filtration line requiring a Vertical/Horizontal Pressure Leaf Filter, or looking to source durable filter elements and spare parts to optimize your existing equipment, SEPARATECH is your trusted industrial partner.
