Circle Seal 559A-10MP Relief Valve
500 Series: Adjustable Popoff & Inline Relief Valves, 0.5 to 150 psig
Features:
- Popoff, Popoff with Deflector Cap, or Inline configurations
- Adjustable, factory preset cracking pressure
- Zero leakage
- Accurate set pressure
- Wide range of cracking pressure
- Tamper-proof adjustment
- 100% seat leakage tested
- PED certifications and CE marking available for most models (add “PED” prefix to the valve part number if required)
Applications:
- System overpressure protection
- Storage tanks
- Freon recovery systems
- Medical equipment
- Refrigeration and heating equipment
- Measuring & dispensing pumps
- Communications equipment
- Process control instruments
- R&D pilot plants
- Vacuum pump safety
Circle Seal 559A-10MP Relief Valve Technical Data:
- Description: 1-1/4″ MNPT X 1-1/4″ FNPT Inline Relief Valve, Aluminum/Buna-N construction, cracking pressures between 0.5 to 150 psig
- Configuration: Inline
- Pressure Rating: 150 psig
- Body Material: Aluminum
- Seal Material: Buna-N
- Inlet Connection Size & Type: 1-1/4″ MNPT
- Outlet Connection Size & Type: 1-1/4″ FNPT
- Cracking Pressure: 0.5 to 150 psig (REQUIRED SET PRESSURE MUST BE SPECIFIED)
- Flow at Cracking Pressure: 5cc/min
- Leakage, Ascending Pressure: 0 to 95% of cracking pressure
- Leakage at Reseat Pressure: Zero
- Temperature: -65F to +275F
Cracking / Reseal Pressure Graphs:
Air Flow Rate Table:
Dimensional Information:
- Length (“L”): 4.67″
- Hex (across flats): 1-7/8″
Notes:
- Proper filtration is recommended to prevent damage to sealing surfaces.
- Cracking pressure tolerance is ±5% (may be greater than ±5% if set pressure is ≤ 1 psi); cracking pressure on initial crack may be higher than cracking pressure tolerance due to inherent characteristics of seals.
Repair Kit(s):
- K/559A-10MP-A/C (for all cracking pressures between 0.5 and 13.9 psig)
- K/559A-10MP-D/E (for all cracking pressures between 14 and 74.9 psig)
- K/559A-10MP-F/G (for all cracking pressures between 75 and 150 psig)
Please contact our Sales Department for assistance in selecting the right products for your application.
Product Catalog: Circle Seal Relief Valves
Service Information Sheet: Circle Seal 500-Series Relief Valves
