This document provides information on the performance parameters and certifications of the Type 441 and 442 DIN standard safety valves LWN 462.01-D and LWN 482.01-D, including certification numbers and discharge coefficients for Europe, Germany, the United States, Canada, China, and Russia.
The document provides detailed information on the Leser Type 441/442 DIN flange‑spring safety valve, covering both conventional and stainless‑steel bellows versions. It lists the available materials for each component, such as housing, spring, and sealing elements, and describes the different configurations (open, closed, H2/H3/H4 caps, etc.).
Key specifications include DN size ranges, pressure and temperature limits, and ordering numbers for each variant. Additional accessories and optional parts are listed in the final sections, with references to further pages for more details. This manual is written in German.
| Housing material options | Grauguss (0.6025), Duktil Gr. 60‑40‑18 (0.7043), WCB (1.0619), CF8M (1.4408) |
|---|---|
| Maximum operating pressure (standard bellows) | 435 psig |
The housing can be made of Grauguss (0.6025), Duktil Gr. 60‑40‑18 (0.7043), WCB (1.0619) or CF8M (1.4408).
The standard bellows operates from a minimum of 15 psig up to a maximum of 435 psig.
Use the article numbers listed under the "How to order — Artikel‑Nummern" section of the document.