Van an toàn Leser Type 447

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 have 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)

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

Product Overview

• API Series (Type 526)
• Clean Service (Type 483, 484, 485, 488)
• Compact Performance (Type 437, 459/462)
• High Performance (Type 441/442)
• Critical Service (Type 447)
• Change Over Valves (Type 310, 311)