Filter Press Questions & Answers

Got Questions? We Have Answers. From model selection to troubleshooting, find the information you need.

Category 1: Basics & Selection

A: Selection depends on three main factors:

  • 1. Material Type: Is it easy or difficult to dewater? (e.g., sand vs. biological sludge).
  • 2. Daily Capacity: How many liters or tons of solid per day?
  • 3. Cake Moisture Target: Do you need a standard cake (60-70%) or extra dry cake (<50%)? 

Tip: Use our [Compare Models] page or contact our engineers for a free calculation.

A: The formula is: $Area (m^2) = \frac{Total Solid Volume (L)}{Cycle Time \times Cake Thickness}$. However, cycle time varies by material. We recommend sending us a 1-liter sample for a [Laboratory Test] to determine the exact filtration rate and cake thickness.

A:

  • Chamber Press: Filters by feed pump pressure only. Simple and cost-effective.
  • Membrane Press: Uses a secondary squeezing step (water/air inflation) after feeding. This reduces cake moisture by an additional 10-20% and shortens the cycle time.

A: Yes.

  • Standard PP plates: Up to 80°C.
  • High-Temp PP plates: Up to 100°C.
  • [Cast Iron Filter Press]: Up to 300°C (for hot oil/petroleum).

Category 2: Operation & Technical

A: It varies widely:

  • Fast filtering: Sand/Mining tailings (20-40 minutes).
  • Slow filtering: Biological sludge/Clay (2-4 hours).
  • Membrane Squeezing: Can reduce cycle time by 30-50%.

A:

  • Standard Chamber Press: 0.6 – 1.0 MPa (6-10 bar).
  • Membrane Squeezing: 1.0 – 1.6 MPa (10-16 bar).
  • [High-Pressure Press]: Up to 2.0 – 2.5 MPa (20-25 bar) for difficult materials.

Warning: Never exceed the rated pressure on the nameplate.

A: It depends on your material. If filtration speed slows down significantly, the cloth pores are likely blocked.

  • Manual Cleaning: High-pressure water gun every 1-3 days.
  • Automatic Washing: Our Auto Cloth Washing System cleans the cloth automatically after every cycle or set number of cycles.

A: Yes, we supply a complete turnkey system including:

  • Feed Pump (Screw pump, Diaphragm pump, or Centrifugal pump).
  • Squeezing Pump (Multistage centrifugal pump).
  • Air Compressor & Receiver Tank.
  • PLC Control Cabinet.

Category 3: Maintenance & Parts

A:

  • Filter Plates (PP): 3-5 years under normal operation (avoiding empty chamber pressure).
  • Filter Cloths: 3-6 months depending on the abrasiveness of the slurry and cleaning frequency.
  • We keep a large stock of spare plates and cloths for immediate shipment.

A: We recommend HM46 or HM68 anti-wear hydraulic oil. The oil should be replaced once a year to ensure smooth operation of the hydraulic station.

A: Common causes:

  • 1. Debris on sealing surface: Clean the plate edges and cloth.
  • 2. Insufficient closing pressure: Check the hydraulic gauge.
  • 3. Worn filter cloth: Inspect for holes or folds in the cloth.
  • 4. Uneven feed: Ensure the feed pump pressure is stable.

Category 4: Commercial & Shipping

A:

  • Standard Models (Manual/Small Hydraulic): 10-15 days.
  • Large Automatic Models (>=100m²): 20-30 days.
  • Customized/High-Pressure Models: 35-45 days.

A:

  • Small machines are packed in wooden crates.
  • Large machines are wrapped in plastic film and fixed directly into 20ft or 40ft containers.
  • The hydraulic station and control cabinet are packed separately in wooden boxes for protection.

A: Yes.

  • Online Guidance: Free video calls and detailed installation manuals.
  • On-Site Commissioning: We can send engineers to your site for installation and training (visa & travel costs apply).

A: Absolutely. We are located in [Zhengzhou, China]. We welcome you to visit us to see our manufacturing process and running machines. We can also arrange a Live Video Factory Tour via Zoom/WhatsApp if you cannot travel.

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Our engineering team is ready to solve your specific filtration challenge.

Typical response time: < 24 Hours.

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