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DuoPort® Pressure Relief Valve Manifolds for Small Storage Containers 8542 Series

Designed especially for use as a primary relief device on smaller stationary storage containers, with 2" NPT threaded couplings. These manifolds allow servicing or replacement of either of the two relief valves without evacuating the container or loss of service. The operating lever selectively closes off the entrance port to the relief valve being removed while the remaining valve provides protection for the container and its contents. The rating of each manifold is based on actual flow through the manifold and a single pressure relief valve, taking friction loss into account. It is not merely the rating of the relief valve alone.

Unit of Measure

Specifications

Size

 N/A 2 in

Capacity

 N/A 250 lb

Material

 N/A Aluminum

Start To Discharge Setting

 N/A 265 psig

Rating

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

Application

Liquefied petroleum (LP)-Gas Application

 N/A No

NH3 Application

 N/A Yes

Connection

Container Connection Size

 N/A 2 in

Container Connection Type

 N/A Male National Pipe Thread (MNPT)

Relief Valve

Quantity

 N/A 2

Part Number

 N/A AA3135MUA250

Inlet Connection Size

 N/A 1 1/4 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 6430 scfm

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

 N/A 6,341 scfm

Accessories

Accessories

 N/A

Part Number - AA3135-10
Part Name - Pipe-away Adaptors

Note

Note for Accessories

 N/A

2" F. NPT outlet connection.

Note for Air Flow Capacity

 N/A

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

Additional Information

Additional Information

 N/A

The operating lever selectively closes off the entrance port to the relief valve being removed while the remaining valve provides protection for the container and its contents. The rating of each manifold is based on actual flow through the manifold and a single pressure relief valve, taking friction loss into account. It is not merely the rating of the relief valve alone.