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Safety Relief Valves
With more than 1,200 employees and 150,000 safety valves produced per year, LESER is the largest manufacturer of safety valves in Europe and one of the leading companies in its industry worldwide.
LESER offers spring loaded and pilot operated safety valves for all industrial applications according to the Pressure Equipment Directive and ASME XIII. Major companies in the chemical, oil and gas, petrochemical, energy, technical gases, LNG/LPG, pharmaceutical, food and beverage, shipbuilding and heating and air conditioning industries use LESER safety valves.
LESER safety valves are developed for the international market in Hamburg and manufactured in the modern plant in Hohenwestedt/Germany. In addition, LESER produces safety valves to the same standards in India and China for the local markets. Nine subsidiaries and offices in Europe, America, the Middle East and Asia as well as authorized contacts in over 80 countries guarantee competent customer advice and fast, reliable deliveries.
 API Safety Valves
Safety valves according to API 526 with standardized capacities, installation dimensions and materials.
Standardized design and selection according to API 520
Wide range of high-alloy materials available in standard delivery times
Longer service life due to hardened discs, stellited seats and shielded bellows
LESER Nanotightness exceeds API 527 tightness requirements by 50%
 Pilot Operated Safety Valves
Safety Valve solutions for high plant efficiency.
Adaptation of the functional behavior to the operating conditions possible
Operating pressures up to 97% of set pressures
Back pressures up to 95% of set pressures
Low loss of medium during the blow-off process
 Compact Performance
Safety valves with compact dimension and variable connections.
Adaptation of the functional behavior to the operating conditions possible
Operating pressures up to 97% of set pressures
Back pressures up to 95% of set pressures
Low loss of medium during the blow-off process
 High Performance
Safety valves for all industrial applications.
The standard safety valve for chemical plants in Europe
Easy maintenance
High performance in relation to the nominal size
Nominal inlet diameters from DN 20 / ¾“ to DN 400 / 16“ with wide range of options
Good price-performance ratio
 Critical Service Safety Valves
Safety valves with PTFE lining for corrosive media.
Wetted areas made of corrosion resistant PTFE
Cost-effective alternative to high-alloy materials, such as nickel-based alloys
Optional ATEX compliant lining prevents electrostatic charge
 Clean Service Safety Valves
Safety valves for food, beverage, and pharmaceutical applications.
Wetted areas made of corrosion resistant PTFE
Cost-effective alternative to high-alloy materials, such as nickel-based alloys
Optional ATEX compliant lining prevents electrostatic charge
 Modulate Action Safety Valves
Safety valves primarily for liquid applications.
Identical inlet and outlet connections
Low loss of medium when opening
Backpressure resistance up to 40 bar / 580.15 psig
 Bursting Disc Safety Valves
Safety valve solutions for high plant availability.
Part-tested Safety valves / Bursting disc combination
 Change-Over Valves
Solutions for high plant availability.
Change-over valve / safety valve combination
Flow-optimized designs for minimum inlet pressure drop
Delivery times synchronized with the safety valves
New and Remanufactured
Safety relief valves in 1/8” bronze to 12” steel from more than 30 manufacturers including Kunkle, Consolidated, Farris, Crosby, Conbraco, Aquatrol and many others. Lower Prices, reliable products and quick availability make remanufactured valves a profitable option. During the remanufacturing process, all valves receive the utmost attention to ensure they meet original specifications. Remanufactured valves meet all applicable codes and are guaranteed for two years on parts and workmanship.
Repair Services
Repair services by factory trained personnel keep your safety valves operating at peak operating efficiency. Repaired valves maintain a one year guarantee on parts and workmanship.
Exchange and Rental Program
Before a maintenance shutdown, the safety valves you need are shipped in advance. The old valves are then returned for repair. After repair, the valves are shipped back to you for replacement of the rental valves.
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