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Leser Product Information

Leser Type 310 and 311

Type 310/311

Change Over Valve

In chemical plants, critical service conditions and media may occur which place special demands on the design of safety valves, e.g.

  1. Highly Corrosive Media

  2. Highly Toxic Media

  3. High Back Pressure

LESER has developed two series of safety valves for these applications

Type 447

Safety valve with full PTFE lining for protection from highly corrosive media. The PTFE bellow is gastight and back-pressure compensated. Adherence is avoided by the smooth PTFE surfaces.
Chlorine manufacture and processing
Reducing acids (e.g. hydrochloric acid, acetic acid)
Alkalis (e.g. NaOH solution)

Technical Information
Type Flange ANSI B 16.5 Flange DIN 2501 Main Characteritics
310 #150...#600 1"...2" 40...160 25...50 Cast Construction
311 #150...#600 3"...16" 10...160 80...400 Welded Construction