Type 310,311
Change Over Valves
Change-over Valves are used when a plant shutdown is impossible or undesirable for process engineering or commercial reasons.
With change-over valves, it is possible to switch over between parallel safety valves without interrupting operation, so as, for example, to perform maintenance work.
The design of the change-over valves ensures: low pressure losses on discharge flow (3% criterion) adequate open passage in any position during the change-over
process stable operation of the downstream safety valves The combination of LESER change-over and safety valves has been comprehensively tested on full flow test labs.
There are two series available:
Type 310:
Cast construction DN 25...50/ NPS 1"...2"
Applications:
Continuously Functioning Plant
Bitumen refineries
Oilfields
Ethylene plants
Application Required by National Standards
TRB 801 Nr. 14 for refrigeration systems
TRB 801 Nr. 26 for technical gases below -10°C (14°F)
TRB 801 Nr. 27 for liquid gas systems
Type 311:
Welded construction DN 80...400/ NPS 3"...16"
Non-Drainable Systems
Natural gas caverns, large storage facilities
Storage tanks for technical gases (e.g. ehtylene reservoirs)
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Type 310:
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Type 311:
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| Applications: | |
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Continuously Functioning Plant
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Non-Drainable Systems
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Related Products:
Type 441