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Multiport™ Pressure Relief Valve Manifold Assemblies for Large Storage Containers A8560, A8570 and AA8570 Series

Designed especially for use as a primary relief device on large stationary pressurized storage containers with flanged openings. These manifolds incorporate an additional relief valve, not included in the flow rating, allowing for servicing or replacement of any one of the relief valves without evacuating the container. The hand wheel on the manifold selectively closes off the entrance port to the relief valve being removed while the remaining relief valves provide protection for the container and its contents. All manifold flow ratings are based on flow through the relief valves after one has been removed for service or replacement.

Unit of Measure

Specifications

Material

 N/A Ductile Iron

Start To Discharge Setting

 N/A 250 psig

Rating

 N/A American Society of Mechanical Engineers (ASME) Underwriters Laboratories (UL®) Listed

Application

Liquefied petroleum (LP)-Gas Application

 N/A Yes

NH3 Application

 N/A Yes

Connection

Container Flange Connection Size

 N/A 4 in

Container Flange Connection Capacity

 N/A 300 lb

Relief Valve

Quantity

 N/A 4

Part Number

 N/A A3149MG

Inlet Connection Size

 N/A 2-1/2 in

Inlet Connection Type

 N/A Male National Pipe Thread (MNPT)

Flow Capacity

Underwriter Laboratories (UL®) Rated Flow Capacity Per Air at 120 Percent (%) of Set Pressure

 N/A 27,750 scfm

ASME Rated Flow Capacity Per Air at 120 Percent (%) of Set Pressure

 N/A Not Applicable scfm

Accessories

Accessories

 N/A

Part Name - Pipe-away Adaptors

Note

Note for Air Flow Capacity

 N/A

Flow rating based on number of relief valves indicated in parentheses ( ). Flow rates shown are for bare relief valves. Adapters and pipe-aways will reduce flow rates as discussed in the Foreword section.

Note for Accessories

 N/A

Outlet 3 1/2-8N (F) thread, will accept 3" M. NPT pipe thread.

Note for Container Flange Connection

 N/A

For use with modified 300# ANSI flange with 4" port.

Additional Information

Additional Information

 N/A

The hand wheel on the manifold selectively closes off the entrance port to the relief valve being removed while the remaining relief valves provide protection for the container and its contents. All manifold flow ratings are based on flow through the relief valves after one has been removed for service or replacement.