CHG Metal manufactures rectangular filter leaves for horizontal pressure leaf filters, rectangular housings and large flat-panel layouts. A rectangular leaf commonly uses a reinforced C-channel or U-channel frame, top suspension, side rail, bottom nozzle or hub, and is designed around vessel dimensions, long-span stiffness, cake load and discharge method.
Dimensions and Frame Rigidity
The long span of a rectangular leaf amplifies bending caused by differential pressure, cake weight and vibration. Frame section, stiffeners, corner welding, mesh tension and support layers control rigidity.
|
Parameter |
Reference/Custom Range |
|
Reference size |
1200×1500, 900×1200, 1500×2000 mm |
|
Thickness |
23 mm standard; 15 mm slim profile |
|
Frame |
C-channel/U-channel and reinforced edge |
|
Support core |
3×3 or 4×4 heavy mesh |
|
Connection |
Top suspension, side rail, bottom nozzle and hub |
|
Material |
SS304, 316L, 904L, C276 and others |
Heavy Rectangular Leaves vs. Standard Light-Duty Panels
Upgrading to structural-grade rectangular filter leaves provides distinct mechanical and operational advantages:
| Operational Parameter | Standard Light-Duty Panels | Our Heavy Rectangular Filter Leaves |
| Corner Weld Rigidity | Spot-welded or crimped (Prone to racking) | Full-Penetration Mitered Welds (Zero racking under load) |
| Long-Span Deflection | Flexes under differential pressure | Heavy C-Channel Profile (High section modulus & low flex) |
| Pre-Coat Adhesion | Surface flexing causes cake cracking | Flat Rigid Plane (Consistent pre-coat layer stability) |
| Vibratory Cake Discharge | Energy absorbed by flexible frame | Rigid Frame Transmission (Instant, complete cake drop) |
| Manifold Hub Integrity | Cast hubs prone to stress cracking | CNC-Machined Solid Bar Hubs (High fatigue resistance) |
| Service Lifecycle | Frequent frame warping requiring early replacement | Extended Operational Life (Re-meshable heavy chassis) |
Key Performance Advantages Rooted in Our Manufacturing Process
Precision Mitered Corner Construction: Frame corners are CNC-mitered and continuous-welded to form a rigid perimeter frame that eliminates structural twisting and diagonal flex during operation.
Tensioned Multi-Layer Assembly: Active filter cloth faces are mechanically tensioned before outer frame clamping or spot welding, ensuring a taut surface that prevents mesh bagging or fatigue failure.
Precision CNC Discharge Hubs: Outlets are machined from solid stainless steel bar stock with precision O-ring grooves to guarantee leak-free seating into lower vessel manifolds.
FAQ
Q: When should rectangular filter leaves be used?
A: Use them for rectangular or square housings, horizontal pressure leaf filters and large flat-panel layouts where a long guide and bottom nozzle are used.
Q: What determines rectangular leaf rigidity?
A: Frame section, stiffeners, corner welds, mesh tension, support layers and operating pressure all determine rigidity.
Q: Why is frame rigidity so critical for rectangular filter leaves?
A: Rectangular leaves often feature long vertical spans. Under differential pressure or heavy cake loading, flexible frames can bow or twist. This movement cracks the pre-coat cake, causing slurry bypass and uneven cake drop during vibratory discharge.
Q: Can hub and nozzle positions be customized?
A: Yes. The hub, suspension point, nozzle and hole pattern are manufactured to the equipment drawing or measured old part.
Q: Can rectangular filter leaves be re-meshed when the outer filter cloth wears out?
A: Yes. Our heavy-duty C-channel and bolted/riveted rectangular frames are designed for long service life. When the surface mesh wears down, the heavy structural frame can be inspected, cleaned, and fitted with new mesh layers.
Q: Are custom discharge hub positions available for older filter models?
A: Yes. We manufacture replacement rectangular filter leaves to match any OEM configuration, including bottom center outlets, off-center nozzles, top outlets, and side-mounted manifold collection sockets.
Q: What information is needed for a quotation?
A: Please provide the vessel drawing, overall dimensions, frame thickness, guide clearance, hub or nozzle position, mesh, material, pressure, temperature and quantity.
Request a Quote
Send the rectangular vessel drawing, leaf dimensions, frame thickness, guide, hub/nozzle, mesh, material and operating conditions to CHG Metal for a rectangular leaf quotation.
