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Products>>Section A- RegO / ECII>>Pressure Relief Valves and Relief Valve Manifolds>>Page A-21

                                                                                                                                                  


External Hydrostatic Relief Valves 

Designed especially for the protection of piping and shut-off valves where there is a possibility of trapping liquid LP-Gas or anhydrous ammonia. They may be installed in pipelines and hoses located between shut-off valves or in the side boss of RegOŽ shut-off valves.

Part Number

Start to Discharge Setting (PSIG)

Valve Body Material

Container Connection M. NPT

Height (approx.)

Wrench Hex Section

Accessories 

 Order

Protective Cap 

Pipeaway

Adapter or Threads

SS8001G

250

Stainless Steel

 1/4" 

7/8" 

11/16" 

---

---

SS8002G

 1/2" 

 7/8" 

SS8021G

 1/4" 

1 3/8" 

11/16" 

 1/4" NPSM Thrds.

SS8022G

 1/2" 

 7/8" 

3/8" NPT Thrds.

3127G

Brass

 1/4" 

1 31/32" 

7545-40

---

3129G

 1/2" 

2 19/32" 

1 1/8" 

3129-10*

3127H

275

 1/4" 

1 31/32" 

 7/8" 

---

3129H

 1/2" 

2 19/32" 

1 1/8" 

3129-10*

3127P

300

 1/4" 

1 31/32" 

 7/8" 

---

3129P

 1/2" 

2 19/32" 

1 1/8" 

3129-10*

3127J

350

 1/4" 

1 31/32" 

 7/8" 

---

3129J

 1/2" 

2 19/32" 

1 1/8" 

3129-10*

SS8001J

Stainless Steel

 1/4" 

7/8" 

11/16" 

---

---

SS8002J

 1/2" 

 7/8" 

SS8021J

 1/4" 

1 3/8" 

11/16" 

 1/4" NPSM Thrds.

SS8022J

 1/2" 

 7/8" 

3/8" NPT Thrds.

3127K

375

Brass

 1/4" 

1 31/32" 

7545-40

---

3129K

 1/2" 

2 19/32" 

1 1/8" 

3129-10*

3125L

400

 1/4" 

1 9/16" 

5/8" 

3125-40P Included

---

3127L

1 31/32" 

 7/8" 

7545-40

3129L

 1/2" 

2 19/32" 

1 1/8" 

3129-40P

3129-10*

SS8001L

Stainless Steel

 1/4" 

 7/8" 

11/16" 

---

---

SS8002L

 1/2" 

 7/8" 

SS8021L

 1/4" 

1 3/8" 

11/16" 

1/4" NPSM Thrds.

SS8022L

 1/2" 

 7/8" 

3/8" NPT Thrds.

3127U

450

Brass

 1/4" 

1 31/32" 

7545-40

---

3129U

 1/2" 

2 19/32" 

1 1/8" 

3129-10*

SS8001U

Stainless Steel

 1/4" 

7/8" 

11/16" 

---

---

SS8002U

 1/2" 

 7/8" 

SS8021U

 1/4" 

1 3/8" 

11/16" 

1/4" NPSM Thrds.

SS8022U

 1/2"

 7/8"

3/8" NPT Thrds.

3127G

SS8022G

* 12" F. NPT outlet connection.

Products>>Section A- RegO / ECII>>Pressure Relief Valves and Relief Valve Manifolds>>Page A-21