Change over valve for dual relief valve systems
 |
Type | 370/320 |
| Description | Change-Over-Valve with flushed superlong bellows and emergency gland or with stuffing box seal | |
| DIN PN | 10-250 | |
| DIN DN | 15-500 | |
| ANSI Class | 150-1500 | |
| ANSI NPS | 1/2-20 | |
| Temperature Rating | -196°C up to +650°C | |
| Body forms | Three-way-type | |
| Basic shell material |
Low temperature carbon steel, Carbon steel, High temperature carbon steel, Stainless steel, High temperature stainless steel, High chromium stainless steel, Hastelloy, Inconel, Pure nickel, Titanium, Other special alloys |
|
| Connections | Flanged ends, Butt welding ends, Socket welding ends, Threaded ends, Other requirements | |
| Operation | Handwheel, Chainwheel, Gear operator, Pneumatic piston actuator, Pneumatic diaphragm actuator, Electric actuator | |
| Application | Switch-over valve or in combination with safety valves for toxic, aggressive and inflammable gases and liquids, boiler and cooling water, saturated steam etc., under consideration of the material resistance |