Sintered Felt Operates Under 600 °C Conditions for A Long Period

Sintered felt is made of stainless steel, FeCrAl and other metal fibers with a diameter of micro rating by sintering in high temperature and welding after special non-woven laying and laminating.

Multilayer sintered felt is composed of different pore size layers to form gradient and deliver higher porosity, permeability, filter rating and dirt holding capacity than single layer sintered felt. Sintered mesh often acts as the main filtration layer in filtration applications and works with woven mesh as the protection layer. It can be pleated to increase the filter area and improve the filtration efficiency.

Sintered felt can be fabricated into filter elements of various shapes, such as cylindrical, pleated or round shape. It plays an important role in the filtration applications of various industries due to its precise filter rating.

Category

Sintered felt is divided into sintered felt with or without woven mesh. Sintered felt without woven mesh is made of multiple layers of metal fibers after lapping and laminating. Sintered felt with woven mesh is produced by placing one or two layers of stainless steel woven mesh on ordinary sintered felt and then sintering. The addition of the woven mesh protects the filtration performance of the sintered felt. It is can be further divided into sintered felt with single-layer woven mesh or with double-layer woven mesh.

Many sintered felt sheets without woven mesh are displayed.

Sintered felt without woven mesh

Several sintered felt sheets with single-layer woven mesh are displayed.

Sintered felt with single-layer woven mesh

Sintered felt with double-layer woven mesh

Specification

Material: stainless steel (304, 316L, 314, etc.), FeCrAl, etc.
Max. working temperature: 600 °C; FeCrAl: 1000 °C.
Filter rating: 1–60 μm
Porosity: about 85%
Standard size: 500 mm × 1000 mm, 600 mm × 1000 mm, 600 mm × 1200 mm, 1000 mm × 1000 mm, 1000 mm × 1200 mm, 1000 mm × 1480 mm, 1180 mm × 1450 mm, 1180 mm × 1500 mm

Table 1: Specification of Standard Sintered Felt
Absolute Filter Rating (μm)	Bubble Point Pressure (Pa)±8%	Air Permeability (L/min/dm²)±10%	Porosity(±5%)	Dirt Holding Capacity (mg/cm²)(±10%)	Thickness (mm)(±10%)	Breaking Strength (MPa)(±10%)
5	6800	47	75	5.0	0.30	32
7	5200	63	76	6.5	0.30	36
10	3700	105	77	7.6	0.37	32
15	2600	205	80	8.0	0.40	23
20	1950	280	81	15.5	0.48	23
25	1560	355	80	18.4	0.62	20
30	1300	520	80	25.0	0.63	23
40	975	670	78	25.9	0.68	26
60	650	1300	87	35.7	0.62	28
Notes Bubble point test according to ISO 4003. Air permeability test according to ISO 4022.

Table 2:Specification of High-Pressure Type Sintered Felt
Absolute Filter Rating (μm)	Bubble Point Pressure (Pa)	Air Permeability (L/min/dm²)	Porosity(%)	Dirt Holding Capacity (mg/cm²)	Thickness (mm)	Breaking Strength (MPa)
20	2050	280	82	18	0.68	33×+20%
25	1500	350	80	20	0.66	30×+20%
30	1240	500	78	27	0.61	32×+20%
40	960	650	78	35	0.61	36×+20%
Notes Bubble point test according to ISO 4003. Air permeability test according to ISO 4022. High pressure type sintered felt: compared with standard sintered felt, it is a thickened sintered felt applied with a certain pressure to get a higher dirt holding capacity and porosity.