INFORMATION

• Closed vessels or tanks filled with liquids must have an opening through which the accumulated pressure can be released and vacuum in the tank or vessel compensated. For that purpose MR's Overpressure and Vacuum Relief Valves are provided with weight-loaded or spring-loaded valve discs. In the case of overpressure in the tank, the overpressure valve disc guided in the housing is lifted and releases the volume flow into the atmosphere. When there is a vacuum in the tank, the overpressure of the atmosphere lifts the vacuum disc and the tank is vented. EN 13463-1 / EN 13463-5 / API 2000

• Description
• MR's Breather Valves are ideal for routine service for vent-to-atmosphere applications. This valve provides protection against positive or vacuum overpressure, and prevents air intake and evaporative losses of product while helping to contain odorous and potentially explosive vapors.

• Benefits
• - Minimzation of product lossed
  - Replaceable seat
  - Reduction of emissions
  - Excellent flow characteristics
  - Maintenance of pressure up to just below the maximum permissible (tank) pressure
  

• Specification

• Size:	From 1 1/2" (ND 40A)	To 12" (ND 300A)
  Pressure Range:	From 22 mmH2O	To 10000 mmH2O
  Vacuum Range:	From 22 mmH2O	To 8400 mmH2O

• Materials

• No.	Descriptions	Spec. 1	Spec. 2	Spec. 3
  1	Body	A216-WCB	A351-CF8M	B26-319
  2	Cover	A283-C	A351-CF8M	B26-319
  3	Disc	A240-304	A240-316	A240-304
  4	Seal	TEFLON	TEFLON	TEFLON
  5	Seat	A351-CF8	A351-CF8M	A351-CF8

  - Special materials can available upon request.