https://www.powtech.de/en/ausstellerprodukte/powtec19/product-10158697/ps-r-e-ps-c-type-venting-panels

Donadon PS/R (rectangular) and PS/C (circular) venting panels are composite tension panels composed of three parts: •A slotted, perforated metal part

A seal membrane (usually in PTFE but also available in many other metallic or non-metallic materials
A protection section

In addition vacuum support is available

Suitable for use with gas in static, pulsating and cyclic conditions.
PS vent panels are available in square, rectangular or circular models. They usually have very low vent or vacuum pressures.
PS/R and PS/C venting panels are mainly fitted to dust manifolds, dryers, troughs, silos, separators, mixers, boosters, air filters and sieves.
They can be fitted between welded frames or non-machined profiles in carbon or stainless steel. Machined frames or expensive holders are not necessary.
Venting panels may be supplied in ATEX execution, certified Ex II 2 GD and may therefore be installed in in locations where the presence of explosive atmospheres is probable (locations classified as category 1, 21, 2 and 22).
Venting panels available in ATEX certified execution are both the rectangular (PS/Ex/R) and circular (PS/Ex/C) models
For these applications we recommend the intrinsic safety alarm system NAM 01 certified Eex ia IIC T6 according to European Directive 94/9/CE (ATEX).
Donadon SDD manufactures venting panels in special executions according to European Directive 94/9/CE (ATEX), certified Ex II 2 GD. Therefore these panels may be used in locations where the presence of explosive atmospheres is probable (locations classified as category 1, 21, 2 and 22).
Both rectangular venting panels (PS/Ex/R) and circular venting panels (PS/Ex/C) are available in ATEX certified execution
For these applications we recommend the intrinsic safety alarm system NAM 01 certified Eex ia IIC T6 according to European Directive 94/9/CE (ATEX).

Donadon Safety Discs and Devices Srl (“Donadon SDD”) is today a higly reliable supplier of safety devices like rupture discs (bursting disks), venting panels and pressure relief valves.
Donadon SDD proposes a very competitive pricing list and takes advantage of the long experience in protection of plants and equipment from pressure variations gained in more than 50 years of activity, initially as “Ruggero Donadon” and later as “Officine Donadon”.
The manufacturing plant, recently enlarged and improved, has modern equipment and latest technology machines. Control laboratory is able to test discs up to DN 900 diameter (36 inches) at pressure up to 4000 bar and temperature up to 450°C.
Organization and procedures are designed to ensure reliable manufacturing of high quality products in compliance with ISO 9001-2000 standard as certified by Italcert.
Manufacturing capability and planning system allow fast and reliable service fulfilling the agreed delivery time.
Technical and Commercial services are able to support client requirements and develop the best technical and economical solutions.
Compact company organization, fully dedicated to pressure protection equipment, is highly flexible and able to satisfy both specialized requirements and mass-produced products.
Design, manufacturing and testing are in line with the requirements of European Directive 97/23/CE (PED) and certified for the protection of equipment under pressure.
In addition Donadon SDD is now able to supply also rupture discs, venting panels and pressure relief valves in line with the requirements of European Directive 94/9/CE (ATEX) and certified Ex II 2 GD for use in potentially explosive atmospheres.