Circle Seal HP532B Relief Valve
HP500 Series: High Presssure Popoff & Inline Relief Valves, 150 to 575 psig
Features:
- Very accurate set pressure: valves crack repeatedly at preset pressure with minimal variation
- Zero leakage: up to 95 of cracking pressure
- 100% seat leakage tested: each valve is tested at the factory prior to shipment
- Tamper-proof adjustment: adjustable only from inlet side for safety against tampering; permits precise setting for the most exacting system requirements
- Increased sealing efficiency: as pressure increases, resilient o-ring seal is forced against metal poppet
- Sticking eliminated: poppet head provides metal seat on low pressure side of seal, limiting squeeze on the resilient o-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 simply replacing the resilient seal
- PED certifications and CE marking available for most models: add “PED” prefix to the valve part number if required
Circle Seal HP532B Relief Valve Technical Data:
- Description: Relief Valve, 1/4″ or 1/2″ NPT connections, constructed in Brass with Viton seal, cracking pressures between 150 to 575 psig (depending on size)
- Operating Pressure: 150 to 575 psig (1/4″ versions) or 150 to 450 psig (1/2″ versions)
- Body Material: Brass
- Seal Material: Viton
- Cracking Pressure: 150 to 575 psig (1/4″ versions) or 150 to 450 psig (1/2″ versions) (REQUIRED SET PRESSURE MUST BE SPECIFIED)
- Flow at Cracking Pressure: 5 cc/min
- Cracking pressure tolerance: ±5% (cracking pressure on initial crack may be higher than cracking pressure tolerance due to inherent characteristics of seals)
- Leakage, Ascending Pressure: 0 to 95% of cracking pressure
- Reseal pressure: 90% of cracking pressure
- Leakage at Reseal Pressure: zero
- Temperature: -20F to +400F
Dimensional Information:
Notes:
- Air flow curves 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/HP559B-2M-200).
- To specify PED certification, add “PED” prefix to the part number.
- For PED applications, Brass bodies are limited to a max temp of +100F.
- 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 HP500-Series Relief Valves
