Series 500 Modulating Safety Relief Valve

• Reduced Product Loss and Pollution – Soft seats for premium tightness before and after relief cycles.
• All Plastic Soft Goods – There are no elastomer seats or seals providing additional chemical compatibility with the lading fluid.
• Increased System Output – Because of total valve tightness to at least 95 percent of set pressure, the system can be operated nearer to set pressure without valve leakage. The result is greater system production capability.
• Reduced Maintenance Costs – Resilient seats greatly extend service life. Costly and time consuming metal seat lapping is unnecessary.
• Balanced Design – Proper valve operation and lift are unaffected by back pressure. Costly and fragile metal bellows are not required.
• ASME Section VIII Stamp – Certified National Board capacities for steam, gases, and liquids assures user of independent third party flow rate verification.
• Unique Field Test Capability – Allows accurate set pressure verification with valve in service. No system isolation valve or rupture disc is required. Single indicator button is available for accurate and easy verification of set pressure.
• Reduced Noise – Modulating action minimizes flow and resultant noise during normal system upset reducing noise abatement costs.
• Ease of Adjustment – Adjustment for set pressure allows accurate and dependable setting.
  

Sizes: 1-1/2" x 2" to 10" x 14"
Orifices: 0.110 to 63.50 in2 [0.710 to 409.7 cm2]
Inlet Ratings: ANSI Class 150 to 600
Temperature Range: -65 to +515°F [-54 to +268°C]
Set Pressures: 15 to 720 psig [1.03 to 49.6 barg]
Code: ASME VIII