Key facts
- Brand
- LESER-Type
- Model
- Type 441
- Category
- Other
- Documents
- 2
- Languages
- DE
- Last added
- 2012-03-19
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LESER 441/442 DIN Datasheet
The LESER 441/442 DIN series are flanged spring safety valves offered in conventional and stainless‑steel bellows constructions. The document lists the various component parts, material options and part numbers for each variant.
Key data include DN size ranges, pressure and temperature limits, material grades for caps, screws and seals, as well as ordering codes for different configurations. Dimensional tables and weight figures are provided for each size. This manual is written in German.
All LESER-Type Type 441 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What material options are available for the valve housing?
The housing can be made of Grauguss (0.6025), Duktil Gr. 60‑40‑18 (0.7043), WCB (1.0619) or CF8M (1.4408).
What is the pressure range for the standard bellows version?
The standard bellows operates from a minimum of 15 psig up to a maximum of 435 psig.