!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> CP Inc | Leser type 483,484,485,488 Safety Relief Valve for Clean Service
Advance Valve Product Information

Leser Product Information

Leser Type 477

Type 447

Safety Valves for Corrosive Service Conditions

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 three 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 Set Pressure Range Flange ANSI B 16.5 Flange DIN 2501
(bar) (psig) PR NPS PN DN
447 0.1...16 1.5...235 #150 1"...4" 16 25...100