Leser Product Information
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.
- Highly Corrosive Media
- Highly Toxic Media
- 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.
Applications
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 |