Lonergan
Direct replacement valves and spare parts to support the installed base of Lonergan D series pressure relief valves in commercial
nuclear power plants.
 D / ND Series
The Lonergan D and ND series are conventional, top guided, single ring, full nozzle, unbalanced pressure relief valves for
use on steam, air, gas and liquid service.
| Inlet Sizes: |
|
1" through 8" (25.4 mm through 203.2 mm) |
| Outlet Sizes: |
|
2" through 10" (50.8 mm through 254 mm) |
| Connection: |
|
Flanged |
| Orifice Sizes: |
|
D through T |
| Set Pressure Range: |
|
3 psig to 6000 psig (0.2 barg to 414 barg) |
| Materials: |
|
Cast Carbon Steel or Stainless Steel with
Stainless Steel Trim is Standard, Alternate
Materials Available |
| Service Medium: |
|
Steam, Air, Gas, and Liquid |
| ASME Code: |
|
Section III |
| Options: |
|
Soft seat design |
|
DB / NDB Series
The Lonergan DB and NDB series are balanced bellows design pressure relief valves for use on steam, air and gas and liquid service.
The balanced bellows minimizes the effects of backpressure and prevents the process fluid from entering the spring chamber.
| Inlet Sizes: |
|
1" through 8" (25.4 mm through 203.2 mm) |
| Outlet Sizes: |
|
2" through 10" (50.8 mm through 254 mm) |
| Connection: |
|
Flanged |
| Orifice Sizes: |
|
D through T |
| Set Pressure Range: |
|
3 psig to 6000 psig (0.2 barg to 414 barg) |
| Materials: |
|
Cast Carbon Steel or Stainless Steel with Stainless Steel Trim is Standard, Alternate Materials Available |
| Service Medium: |
|
Steam, Air, Gas, and Liquid |
| ASME Code: |
|
Section III |
| Options: |
|
Soft seat design |
|
|
