Circle Seal 580A 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 580A Relief Valve Technical Data:
- Description: Relief Valve, 1/8″ to 1-1/4″ NPT connections (depending on configuration), constructed in Aluminum with Polished PTFE seal, cracking pressures between 0.5 to 150 psig
- Pressure Rating: 150 psig
- Body Material: Aluminum
- Seal Material: Polished PTFE
- Cracking Pressure: 0.5 to 150 psig (REQUIRED SET PRESSURE MUST BE SPECIFIED)
- Flow at Cracking Pressure (PTFE seal): 0.02 SCFM
- Cracking pressure tolerance: ±5% (will 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
- Leakage, Ascending Pressure:
- PTFE seals:
- Cracking pressures up to 2.4 psi: 4cc/min at 0 to 50% of cracking pressure
- Cracking pressures 2.5 psi and higher: 1 cc/min at 0 to reseat pressure, 10cc/min from reseat to 90% of cracking pressure
- PTFE seals:
- Leakage at Reseat Pressure (PTFE seal): 1cc/min for cracking pressures 2.5 psi and higher
- Temperature: -320F to +165F
Dimensional Information:
Notes:
- Model 580 valves include Polished PTFE seal for cryogenic applications, but do not include cryogenic testing and serialization.
- Cracking / Reseal pressure graphs, Air and Hydraulic flow curves and air flow rate tables are available in the product catalog.
- In normal service, the only part which may require replacement is the seal. A repair kit may be ordered by placing a “K/” in front of the complete valve part number (i.e. K/559A-2M-10).
- To specify PED certification, add “PED” prefix to the part number.
- Proper filtration is recommended to prevent damage to sealing surfaces.
- It is solely the responsibility of the system designer and user to select products suitable for their specific application requirements and to ensure proper installation, operation and maintenance of these products. Material compatibility, product ratings and application details should be considered in the selection. Improper selection or use of these products can cause personal injury or property damage.
Please contact our Sales Department for assistance in selecting the right products for your application.
Product Catalog: Circle Seal 500-Series Relief Valves
Service Information Sheet: Circle Seal 500-Series Relief Valves
