leser safety valve manual pdf free sample

ENGINEERING is the technical manual for safety valves from LESER. The extensive collection offers you information for almost all areas around the safety valve and is aimed at both occasional and advanced users. Learn interesting facts and information on safety valves.

LESER is the largest manufacturer of safety valves in Europe and one of the leading companies in its industry worldwide, backed by more than 200 years of tradition. LESER offers spring loaded and pilot operated safety valves for all industrial applications according to the API, PED and ASME VIII. Major companies in the oil and gas, petrochemical, chemical, energy, technical gases, LNG/LPG etc use LESER safety valves. LESER safety valves are developed for the international market in Hamburg and manufactured in the modern plant in Hohenwestedt/Germany.

Safety valves from the API product group meet all the requirements of API 526 such as standardized capacity, nominal diameter, and center to face dimensions which offers 100% compatibility. Because of their robust construction, they are especially suitable for being constructed from special materials such as Duplex, Monel, and Hastelloy.

API 526 is a purchase specification in which the nominal diameters, flange pressure ratings, center to face dimensions, flow areas, body and spring materials and their service limits are stipulated for "API safety valves" API safety valves are used worldwide in the petrochemical industry, both on- and off-shore. These applications are characterised by standardised plants, blow-down systems and long pipework sections. The LESER type 526 combines the requirements of the API standards and the ASME Code with the tried and tested service reliability of the LESER range.

Safety valves from the Clean Service product group were specially developed for the food, beverage, and pharmaceutical industries and meet all the relevant standards and regulations such as DIN 11866 or ASME BPE. With a low deadspace inlet area, the unique LESER HyTight assembly, and the optional pneumatic lifting device you have very good cleanability (CIP, SIP). With a large selection of aseptic connections (threaded, flanged, or clamped) the valve can be optimally fitted to different requirements.

The safety valves of the 48x series can be fitted with manually lockable lifting devices H4 to hold open at a small lift, and with pneumatic lifting devices H8 for automated systems (CIP process).

Safety valves from the High Performance product group offer especially high capacity for their size. With a large quantity of nominal diameters (DN), pressure ranges and product options, they have proven themselves as a universal safety valve for many applications.

Full Flanged Safety Valves with Flanged Connections open rapidly to the full design lift.They are used in particular for vapours and gases, in applications where the maximum mass flow has to be discharged rapidly. LESER type 441 is suitable for almost any industrial application, and are worldwide one of the best selling spring-loaded flange type safety valves.

Type 441 ANSI: Cast steel construction with ANSI flanges. Two body materials: stainless steel and cast steel. Center to face length in accordance with API 526, greater discharge capacity than standard API valves.

PTFE-lined safety valves from the Critical Service product group are utilized for highly corrosive media such as chlorine, acids, and lyes. With their highly resistant lining they offer a safe solution for corrosive media.

The product group Compact Performance includes threaded and flanged safety valves with compact dimensions for economical protection of small and midsized capacites. Due to its many orifice diameters, seals, and connections this product group offers a very wide area of application.

Type 437:Safety relief valve spring loaded for small mass flows (e.g. thermal expansion and overflow). Body material: stainless steel, 430 chrome steel.

Type 459/462Full lift safety valve spring loaded for the medium mass flow range (e.g. small scale or pilot plant). Two body materials: stainless steel or steel.

Change-over valves from the Best Availability product group increase plant availability.Change-over Valves are used when a plant shutdown is impossible or undesirable for process engineering or commercial reasons. With change-over valves, it is possible to switch over between parallel safety valves without interrupting operation, so as, for example, to perform maintenance work. The design of the change-over valves ensures: low pressure losses on discharge flow (3% criterion) adequate open passage in any position during the change-over process stable operation of the downstream safety valves The combination of LESER change-over and safety valves has been comprehensively tested on full flow test labs.

Safety valves from the Modulate Action product group feature a standard or proportional opening characteristic. They minimize medium loss when opening and are used for protection from pressure peaks, thermal relief, and liquids.

Relief and Safety Relief Valves with Flanged Connections are ideal relief valves for medium mass flows. Their large proportional range leads to consistent functioning and relief of pressure peaks, particularly with liquids. Both proportional and safety relief valves are characterized by particularly stable operation.