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 310/311, Supplementary loading systems type 700, KUB Bursting disc type 316):
Other complimentary product
series such as supplementary loading systems,
change-over valves and bursting discs which
complete the LESER safety valve offering.
