0.5-150 PSIG Relief Valve
Description
Circle Seal Controls Model 559A-8M Relief Valve
Catalog literature: Relief Valves Catalog.pdf
The Circle Seal Controls model 559A-8M Relief Valve provides a combination of absolute leak-proof sealing when closed and virtually maintenance-free dependability in a small, lightweight package.
Features:
- Zero leakage: to 95-98% of cracking pressure
- Increased sealing efficiency: as pressure increases, resilient quad-ring seal is forced against metal seat up to set cracking pressure
- Cracking pressure accuracy: valves can be factory pre-set to required cracking pressure; 100% seat leakage tested
- Wide range: wide range of cracking pressures, without sacrificing flow characteristics, provided through interchangeable springs and simple adjustment
- Tamper-proof adjustment: adjustable only from the inlet side for safety against tampering; permits precise setting for the most exacting system requirements
- Sticking eliminated: poppet head provides metal seat on low pressure side of seal, limits squeeze on resilient seal ring; prevents water and dirt from entering valve
- Long, maintenance-free service: parts will not wear out in normal service; overhaul, if necessary, is quickly made by replacing resilient seal
- Variations: vent-to-atmosphere or inline connections; various materials for both body and seals; PED certifications and CE marking available for most models
Applications:
- System overpressure protection
- Storage tanks
- Freon recovery systems
- Medical equipment
- Refrigeration & heating equipment
- Measuring & dispensing pumps
- Communications equipment
- Process control instruments
- R&D pilot plants
- Vacuum pump safety
Technical Data:
- Configuration: Popoff
- Cracking pressure: 0.5-150 PSIG
- Operating pressure: Vacuum to 200 PSIG
- Body material: Aluminum
- Seal material: Buna
- Connections: 1″ MNPT
- Temp range: -65 to +275F
Dimensions:
- “L1″ dimension (length): 2.86”
- Hex dimension: 1-1/2″
- “L” dimension: N/A (no deflector cap installed)
- “D” diameter: N/A (no deflector cap installed)