LESER has developed five safety valve types, known collectively as the "48x series", for protection of systems with special cleanliness requirements (Clean Service: systems for foodstuffs, beverages, pharmaceuticals and cosmetics).
The properties common to the "48x series" are

1. Low Dead Space


2. High Surface Quality


3. Free of Crevices


4. CIP, SIP and COP Capability

Safety relief valve with connection direct to vessel.
Applications: Fermenters Bio-reactors

TYPE 488

Full lift safety valve for medium and large mass flows.
Applications: Autoclaves Laboratory facilities Beverage industry (bottling plants (mixers) and storage tanks)

TYPE 485

Safety relief valve with integrated pipe work connection.
Applications: Pipe work protection when direct vessel protection is impossible or not desired.