TYPE 483 484 485 488

Type 483 484 485 488

Safety Valves for Sanitary/Clean Service

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

The four types differ in capacities and opening characteristics

TYPE 483

Safety relief valve for small and medium mass flows.
Applications: Pipelines, Stainless steel reactors/vessels

TYPE 484

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.

The safety valves of the 48x series can be fitted with manually lockable lifting devices H4 to hold open at a small lift, and with pneumatic lifting devices H8 for automated systems (CIP process).