Pressure Relief Valves and Relief Valve Manifolds, External Pop Action Supplementary Pressure Relief Valves for Small ASME Containers and DOT Cylinders, Duoport Pressure Relief Valve Manifolds for Small Storage Containers

Products>>Section A- RegO / ECII>>Pressure Relief Valves and Relief Valve Manifolds>>Page A-22

External "Pop-Action Supplementary Pressure Relief Valves for Small ASME Containers and DOT Cylinders

Designed for use as a supplementary relief valve on small ASME above ground and underground containers. They may also be used as a primary or secondary relief device on DOT cylinders, or as hydrostatic relief valves. All working components of these relief valves are outside the container connection, so the valves must be protected from physical damage.

Part Number

Container Type

Start to Discharge Setting (PSIG)

Container Connection M. NPT

Overall Height (approx.)

Wrench Hex Section

Flow Capacity SCFM / Air*

Suitable for Tanks with Surface Area Up to: ***

Accessories

Order Relief Valves

UL (at 120% of Set Pressure)

(ECII Rated at 480 PSIG)**

Protective Cap

Pipeaway Adapter

Part Number

Outlet Size

3127G

ASME

250

^1/4"

1 ^31/32"

^7/8"

295

---

7545-40

---

3129G

^1/2"

2 ^19/32"

1 ^1/8"

465

3129-10

^1/2" F. NPT

3127K

DOT

375

^1/4"

1 ^31/32"

^7/8"

---

450

100 lbs. Propane

---

3129K

^1/2"

2 ^19/32"

1 ^1/8"

780

200 lbs. Propane

3129-10

^1/2" F. NPT

* Flow rates shown are for bare relief valves. Adapters and pipeaways will reduce flow as discussed in forewording information.

** Not UL or ASME rated. ECII® rated at 480 PSIG.

*** Meets DOT requirements.

DuoPort Pressure Relief Valve Manifolds for Small Storage Containers

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.

Part Number	Start to Discharge Setting (PSIG)	Application		Container Connection M. NPT	Relief Valve Included				Flow Capacity SCFM / Air**	Order Duoports
									UL (at 120% of Set Pressure)
		LP-Gas	NH₃		Quantity	Part Number	Inlet Connection M. NPT	Accessory
								Pipeaway Adapters
8542G	250	Yes	No	2"	2	3135MG	1^1/4"	3135-10*	5,250 (1)
AA8542UA250		No	Yes			AA3135MUA250		AA3135-10*	5,865 (1)
AA8542UA265	265					AA3135MUA265			5,975 (1)

* 2" F. NPT outlet connection.

** Flow rating based on number of relief valves indicated in parenthesis ( ). Flow rates shown are for bare relief valves. Adapters and pipeaways will reduce flow rates as discussed in forewording information.

Products>>Section A- RegO / ECII>>Pressure Relief Valves and Relief Valve Manifolds>>Page A-22