KAIFIL manufactures stainless steel support rings for filter baskets, screen cylinders and filter end structures. Flat annular rings, formed collars and welded bands reinforce the component, support its seating edge and connect the filter body to the surrounding assembly.
Share a drawing, reference sample or application requirements to discuss the configuration.
Rolled metal support rings with axial band sections
Metal support rings with attachment tabs
Band-ring edges and attachment detailsRolled metal support rings with axial band sections
The support ring gives a thin screen or basket wall a defined perimeter and a place to transfer load into the seat, frame or adjoining component. It can reinforce a basket mouth, stiffen a cylindrical screen or carry an end support. The section is selected around the load path and installation envelope, with the active filtering area kept clear.
A flat ring provides a broad radial seating surface. Plate-cut or stamped blanks can include bolt holes, tabs and indexing features in the same outline. The inside diameter clears the basket or flow opening, while the outside diameter and radial width establish the contact area on the housing seat.
A formed collar creates an axial attachment surface around the filter wall. Rolled strip rings add circumferential reinforcement to cylindrical parts. A welded closed ring supplies a continuous perimeter; the drawing identifies weld location, joint preparation and the finished contact surface. For a welded-on ring, include both the free ring dimensions and the installed dimensions after joining.
304 stainless steel suits many general industrial filter assemblies. 316L is a common choice when increased corrosion resistance and welded construction are priorities. We can specify deburred contact edges, a blended weld area, pickling and passivation, or a polished surface to suit the component. Cleaning access and the adjacent mesh attachment are considered when selecting the finish.
The key checks are the finished seat diameter, ring width, section thickness, flatness or roundness, and joint condition. A ring can be dimensionally correct before welding yet pull the basket mouth out of round after attachment. Put the assembly datum and post-weld dimensions on the drawing so the completed filter fits the holder and can be removed for cleaning.
Support rings can be supplied loose for the customer’s fabrication process or joined to a basket, cylinder or support core. Define which surfaces locate the part, which carry load and which receive a gasket. The metal ring carries the structure; a separate gasket or O-ring provides sealing where the joint design requires it.
A basket-mouth ring transfers the supported wall load into the housing seat. A cylindrical end collar provides an axial attachment surface for the screen or perforated core. The component drawing separates the free ring from the welded assembly dimensions, and the assembly inspection measures the finished seating face after joining. The ring, adjacent filter wall, weld and separate gasket form distinct entries in the bill of materials.
For a filter assembly mounted at an EN 1092-1 PN16 flange joint, the mating flange’s DN, outside diameter D, bolt-circle diameter k and hole group identify the surrounding connection geometry. The table covers DN25 through DN150. DN65 uses four holes, while DN80 through DN150 use eight; this change matters when positioning mounting tabs, extraction features and the basket rim relative to the joint.
The support-ring drawing separately defines ring OD, clear bore, radial seating width, plate or band thickness and the finished position after welding. The flange hole circle provides a common assembly datum where attachment features align with the housing. PN16 identifies the mating-flange series; the complete filter assembly’s duty is defined through the support-ring section, supported span, filter wall and joints. Specify the gasket land and removal clearance together with the ring’s installed seating face.
| Component / interface | Defined function and inspection |
|---|---|
| Basket mouth | Continuous seating width around the opening |
| Screen or perforated wall | Defined attachment edge and supported perimeter |
| Ring joint | Closure and weld finish outside the active filter field |
| Housing seat | Finished diameter, flatness and installed height |
| Separate gasket | Continuous seal contact on the designated land |
| Mating flange DN | Flange OD D (mm) | Bolt-circle diameter k (mm) | Holes: count × diameter d2 (mm) |
|---|---|---|---|
| 25 | 115 | 85 | 4 × 14 |
| 32 | 140 | 100 | 4 × 18 |
| 40 | 150 | 110 | 4 × 18 |
| 50 | 165 | 125 | 4 × 18 |
| 65 | 185 | 145 | 4 × 18 |
| 80 | 200 | 160 | 8 × 18 |
| 100 | 220 | 180 | 8 × 18 |
| 125 | 250 | 210 | 8 × 18 |
| 150 | 285 | 240 | 8 × 22 |
| Supply item | Order basis |
|---|---|
| Production lead time | 2–3 weeks after order and drawing confirmation. |
| Trial orders | Small trial quantities for fit and process evaluation. |
| Regular production orders | 50 pieces or US$3,000 per order. |
| Quotation basis | Material, finished dimensions, section geometry, mating interface and quantity. |
| Parameter | Specification | Notes |
|---|---|---|
| Ring construction | Flat annular / formed collar / rolled band | Choose the section for the seat and attachment geometry. |
| Material | 304 / 316L | Match the filter body and the fluid-contact requirement. |
| Primary function | Seating support / rim reinforcement / end support | Transfer loads through the defined mounting contact. |
| Supply condition | Loose ring / welded filter assembly | Identify the delivered assembly state on the drawing. |
| Flat-ring dimensions | OD × ID × plate thickness | Radial width = (OD − ID) / 2. |
| Band-ring dimensions | Diameter × axial height × wall thickness | State inside or outside diameter and the finished weld condition. |
| Formed collar features | Seating lip / axial skirt / attachment edge | Section drawing defines bends, radii and mating clearance. |
| Blanking process | Plate cutting / stamping | Choose by outline, thickness and production quantity. |
| Ring closure | One-piece annulus / welded closed band | Weld position is included in the fabrication drawing. |
| Attachment features | Holes / tabs / seats / welded joints | Locate features from the installation datum. |
| Finish options | Deburred / weld-blended / pickled and passivated / polished | Specify contact surfaces and mesh-facing edges. |
| Fit controls | Seat diameter / flatness / roundness / installed height | Apply assembly checks after welding when delivered joined to a filter. |
| Mating-flange nominal sizes | DN25 / 32 / 40 / 50 / 65 / 80 / 100 / 125 / 150 | EN 1092-1 PN16 identifies the mating-flange layout. The support ring has its own seat diameter, clear bore, section thickness and attachment dimensions. |
Materials: 304 and 316L stainless steel. Ring, filter body and joining material are specified together for welded assemblies.
Examine the part profile, contact faces and construction details.
Metal support rings with attachment tabs
Band-ring edges and attachment details
Include these details when discussing your requirements.
A collar or flat support ring stabilizes the open end and provides the seating edge.
Welded rings reinforce selected positions along a thin cylindrical screen wall.
End rings provide a joining perimeter for a perforated core and adjacent filter components.
This product is a metal structural support for the filter body. A polymer anti-extrusion back-up ring belongs to the seal groove and serves a different purpose.
A flat ring offers radial seating width. A collar adds an axial wall or lip that can attach to, guide or reinforce the filter mouth. Select the section from the mating assembly.
Yes. We can supply the ring as a separate part or include the specified joint in a basket or cylinder assembly. The drawing defines the joining position and finished fit.
The ring is one part of the load-bearing assembly. Its section, span, attachment and the filter wall work together under differential pressure. Define the complete assembly duty when selecting the section.
Check the mating-seat diameter, roundness, seating-face flatness, installed height and clearance for removal. These govern how the finished filter fits the holder.
Yes. Holes, tabs and seating features can be integrated into the ring outline or assembly, with their positions referenced to the installation datum.
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