Pointed start-up strainers with perforated shells and mesh liners. Cone geometry, flange rings, flow direction and commissioning inspection in one technical guide.
Perforated metal screensShare a drawing, reference sample or application requirements to discuss the configuration.
Temporary cone strainers — Product view
The pointed cone uses its sloping wall to provide screening area within the pipe spool. Base diameter, axial insertion length and cone angle define the envelope together. A perforated shell supports a finer woven liner; the liner’s opening and attachment are specified separately. The flow arrow identifies the inlet face and the support side, linking mesh placement to the differential-pressure load path.
The mounting ring is clamped between the named pipe flanges. Ring outside diameter, bore, thickness and gasket land define the joint; an identification tab remains accessible after assembly. The spool drawing includes cone-tip clearance and removal access. Commissioning records clean pressure drop, accumulated debris and differential pressure during flushing; inspection checks the cone seam, ring flatness and liner attachment before reassembly.
The term witch’s hat strainer identifies the pointed-cone form of a temporary start-up strainer installed between pipeline flanges. For procurement, record pipe size and flange facing together with cone length, support-ring geometry, free space in the removable pipe spool, perforation and any fine-mesh overlay. The flow arrow determines the feed face: the mesh is backed by the perforated cone on the discharge side. Specify gasket seating, handle access and the commissioning plan for inspection and removal. These inputs define the complete conical insert and its installation fit.
| Feature | Drawing and operating definition |
|---|---|
| Cone envelope | Base diameter, axial length, included angle and tip clearance |
| Filter stack | Perforated support, woven liner, layer order and inlet face |
| Flange joint | Ring diameter, bore, thickness, gasket land and tab |
| Commissioning | Flow, fluid, debris, pressure-drop monitoring and removal access |
| Hole diameter (in) | Hole diameter (mm) |
|---|---|
| 1/16 | 1.5875 |
| 1/8 | 3.175 |
| 1/4 | 6.35 |
| 1/2 | 12.7 |
Round support-hole sizes are stated in inches with exact millimetre conversions using 1 in = 25.4 mm. Hole pitch, sheet thickness and solid mounting lands complete the support geometry. The optional woven liner has its own mesh and wire specification.
| Mesh count / inch | Wire diameter (mm) | Clear aperture (mm) |
|---|---|---|
| 20 | 0.406 | 0.86 |
| 40 | 0.254 | 0.38 |
| 80 | 0.140 | 0.18 |
| 100 | 0.102 | 0.15 |
Choose the woven liner by its mesh, wire and clear aperture. The perforated support and the finer filtering cloth have separate openings; support holes provide backing and drainage, while the cloth controls the selected particle opening.
| 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, filter construction, connections and quantity. |
| Parameter | Specification | Notes |
|---|---|---|
| Cone envelope | Base diameter, axial length, included angle and tip clearance | — |
| Filter stack | Perforated support, woven liner, layer order and inlet face | — |
| Flange joint | Ring diameter, bore, thickness, gasket land and tab | — |
| Commissioning | Flow, fluid, debris, pressure-drop monitoring and removal access | — |
| Material | 304 / 316L stainless steel | — |
| Perforated support openings | 1/16 / 1/8 / 1/4 / 1/2 in | Round support-hole sizes are stated in inches with exact millimetre conversions using 1 in = 25.4 mm. Hole pitch, sheet thickness and solid mounting lands complete the support geometry. The optional woven liner has its own mesh and wire specification. |
| Illustrated geometry | DN100 line; cone length 150 mm | Geometry of the illustrated construction; finished dimensions follow the equipment interface drawing. |
| Mesh-liner geometry shown | 20 mesh; wire Ø0.25; clear opening 1.02 mm | For square weave:25.4/20−0.25=1.02 mm. |
The screen captures construction debris during flushing and is removed after commissioning.
The upstream screen intercepts debris before it reaches the pump inlet.
The mounting ring is clamped between the named pipe flanges. Ring outside diameter, bore, thickness and gasket land define the joint; an identification tab remains accessible after assembly. The spool drawing includes cone-tip clearance and removal access. Commissioning records clean pressure drop, accumulated debris and differential pressure during flushing; inspection checks the cone seam, ring flatness and liner attachment before reassembly.
The pointed cone uses its sloping wall to provide screening area within the pipe spool. Base diameter, axial insertion length and cone angle define the envelope together. A perforated shell supports a finer woven liner; the liner’s opening and attachment are specified separately. The flow arrow identifies the inlet face and the support side, linking mesh placement to the differential-pressure load path.
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Define the dimensions, media, joints and inspection records before confirming the order.
