Safety valves API526 - SAFE REYCO RL Series | ARI

ARI-REYCO R Series API 526 Safety Relief Valves

The ARI-REYCO R Series are flanged, spring-loaded, direct-acting safety relief valves with full nozzle design, engineered for installations in accordance with API 526 and ASME Section VIII Div. 1. Certified with UV-stamp / NB-stamp for set pressures above 15 psig.

Technical Specifications

• Types: Fig. 971, 973, 974
• Flange Classes: ANSI 150 to ANSI 2500
• Connections: ASME B16.5, RF or RTJ as specified
• Sizes: 1" x 2" up to 8" x 10"
• Body Materials: SA216 WCC, SA217 WC6, SA351 CF8M
• Spring Materials: Chrome Vanadium, SA313 Gr.316, Inconel
• Temperature Range: -321°F to +1000°F, depending on body and spring material
• Sizing Standard: ASME / API 520
• Certified Discharge Coefficients: K = 0.860 for steam/gas, K = 0.724 for liquids

Variants

• Fig. 971: Closed lever lifting device
• Fig. 973: Gas-tight bonnet
• Fig. 974: Open lever lifting device

Fig. 973 is selected where bonnet leakage must be minimized. Fig. 974 is used for periodic manual lift testing.

Media and Applications

Compatible with neutral gases, steam, and liquids. Typical applications include pressure vessels, petrochemical units, refineries, skid packages, steam headers, process gas lines, and equipment requiring API orifice and ANSI pressure class compliance.

Valve Selection Criteria

For gases: mass flow or SCFM, molecular weight, isentropic exponent, temperature, set pressure, and backpressure are required. For liquids: volumetric flow, density, viscosity, temperature, set pressure, and backpressure are required.

Maintenance Considerations

Seat and disc must be protected from particulates, coke, salts, and condensate. Discharge piping should be drained and must not impose mechanical loads on the valve body.