Engineered Controls A8574AG Multiport Relief Valve 2-1/2″ M NPT 4″-300 ASME LP G

Overview

Maintain safety and service flexibility in large-scale LP gas and ammonia storage systems with the Engineered Controls A8574AG Multiport® Relief Valve. This ASME-rated manifold assembly allows operators to remove and replace individual relief valves without shutting down or evacuating the container, ensuring uninterrupted protection.

Applications

• Large stationary pressurized storage containers with flanged openingsLP gas bulk storage facilitiesAnhydrous ammonia storage tanks

Key Features & Benefits

• Continuous Protection During Service — Manifold isolates removed valve while other relief valves remain activePop-Action Design — Provides maximum protection with minimal product loss at excessive pressuresAutomatic Reseating — Relief valves reseat firmly after discharge for reliable sealingBubble-Tight Seal — Resilient seat disc ensures minimal leakageASME-Rated — Approved for LP gas and anhydrous ammonia use
• Durable Protection — Rubber plug and chain protect manifold outlet threads when valve is removedFlexible Mounting — Can be directly mounted to welding neck flange or manhole cover plate; no inlet piping required

Specifications

• Relief Valve Port
• Connection: 2-1/2" M NPTContainer Flange
• Connection: 4"-300Start-to-Discharge Setting: 250 PSI
• Material: Heavy-duty steel/aluminum with resilient seat discThis rugged, high-capacity relief system is engineered for demanding industrial environments, providing both safety and operational efficiency.

Product details

Part / SKU	MFG# A8574AG

Package includes

• Engineered Controls A8574AG Multiport Relief Valve 2-1/2" M NPT 4"-300 ASME LP G

Included components and any stated pack quantity are as described in this listing. Optional accessories shown separately are sold separately unless expressly included above.