Safety solutions from professionals

Today, LESER´s product range comprises a total of 7 product groups with 38 safety valve types. A variety of materials and sizes from DN 10 to DN 400 – 1/2" to 16", provide safe solutions for almost every industrial application. LESER safety valves are approved by a large number of authorities and classification societies (e.g., TÜV, GOSGORTEHNADZOR, PROMATOMNADZOR, ASME/NB, Stoomwezen, Lloyd's Register, I.S.P.E.S.L., CBPVI-China, DNV, GL), suits any applicable standard and are CЄ marked. This ensures their suitability for service worldwide. Safety valves are made of any kind of material and execution with huge number of options.

	High performance (Full Lift Safety Valves with flanged connections type 441/442, 455/456, 457/458): Full lift safety valves open rapidly within an overpressure of 5% 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 types 441/442 are suitable for almost any industrial application and belong to the best selling spring-loaded flange types of safety valves up to a pressure rating of PN 40/PR #300 worldwide.
	API 526 valves (Flanged Pressure Relief Valves according to API type 526): API 526 is a purchase specification in which nominal diameters, flange pressure ratings, centre 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 capacities of API safety valves are relatively low in relation to their nominal diameters.
	Compact performance (Safety Valves with threaded connections type 437/437/439, 459): Safety valves with threaded connections are used for handling small and medium mass flows. The LESER threaded connection safety valves are notable for their wide range of set pressures, compact overall dimensions and low weight.
	Clean service (Safety Valves for "Clean Service" type 481/483/488/484/485): Safety valves for protection of systems with sanitary and hygienic requirements in the food, beverage and pharmaceutical industries.
	Critical Service (Safety Valves for critical service conditions type 447/546/449): Safety valves semi or fully lined typically with PTFE, suitable for aggressive and corrosive media.
	Modulate Action (Relief and Safety Relief Valves with flanged connections type 427/429/431/433/532/534): Safety valves which are installed for protection of small mass flow predominantly for liquids to assure a minimization of the media losses. Suitable for thermal relief applications.
	Best Availability (Change-over valves type 330/3320, Supplementary loading systems type 700, Bursting disc): Other complimentary product series such as supplementary loading systems, change-over valves and bursting discs which complete the LESER safety valve offering.
	S&R: Safety valves to meet the requirements of local codes and standards such as for heating systems (TRD 721).
	Pilot Operated Safety Valve: Piping between the pilot and main valves is integrated into the cover to prevent amage and freezing Integrated Backflow Preventer as standard part Four week delivery time from the factory Higher capacity than comparable size with extra orifices 20% less installation space than competitors' comparable models Supplementary Loading.