Greaves Company Inc.

LESER is a premier engineer and manufacturer of safety & safety/relief valves, one of the largest in the world. LESER safety valves are used by leading companies in industries such as chemical, petrochemical, industrial gases, oil and gas production, and machine building, as well as the food and pharmaceutical industry.

LESER manufactures both spring-loaded and pilot-operated safety valves for all industrial applications according to ASME Code, PED, in accordance with applicable industry standards (e.g. API), local requirements as well as application-based solutions for special requirements.

LESER manufactures valves in full compliance with API 526 (cast steel flanged safety/relief valves, direct-spring operated and pilot-operated both). Direct Spring Operated (526 Series), and High Efficiency pilot-operated safety valves (POSV) (810/820 Series).

LESER supplies Compact Service threaded and flanged safety valves with compact dimensions for economical protection of small and mid-sized capacities (flow rates). Many orifice diameters, seals and connections offer a very wide area of applications and solutions. Series such as 437, 459, 462.

LESER supplies Critical Service PTFE-lined flanged safety valves for corrosive media such as chlorine, acids, and lyes. With their highly resistant lining they offer a safe solution for corrosive media.

LESER supplies Clean Service safety valves for the food, beverage and pharmaceutical industries that meet all the relevant standards and regulations such as DIN 11866 or ASME BPE.

LESER supplies flanged safety valves with a standard or proportional opening characteristic. They minimize medium loss when opening and are used for thermal relief applications, liquid service and protection from pressure peaks. (Series 429, 433).

LESER supplies High Performance flanged safety valves with especially high capacity for their size, with a vast breadth of available sizes, ranges and options. Series 441, XXL, 444, 441 Full Nozzle, 458.

LESER supplies Change-over Valves to allow for uninterrupted downtime, valve serviceability and increased plant productivity.

LESER was founded in 1885 and manufactures all manner of safety valves for all industrial applications, a complete range up to 850 BARG (12,000+ PSIG) and 16"x20" (and more in specialty applications). Contact us for details.