Description
Union connections are similar to thermowells, but with an open bottom.
Palmer Wahl manufactures union connections in Brass, Steel, 304 Stainless Steel, and 316 Stainless Steel.
Choose an external thread to fit your available pipe or process connection, and an internal thread to fit your instrument.
Standard Union Connections
| Series | Internal Thread | External Thread | |
|---|---|---|---|
| 1120-7 |  | 1/2 inch -14 NPT | 3/4 inch -14 |
| 1120-8 |  | 1/2 inch -14 NPT | 1 inch - 11-1/2 |
| 1140-7 |  | 1.25 inch -18 NEF | 3/4 inch -14 |
| 1140-8 |  | 1.25 inch -18 NEF | 1 inch - 11-1/2 |
| 1150-7 |  | 7/8 inch -22 NS | 3/4 inch -14 |
| 1150-8 |  | 7/8 inch -22 NS | 1 inch - 11-1/2 |
Lagging Union Connections
| Series | Internal Thread | External Thread | |
|---|---|---|---|
| 1121-7 |  | 1/2 inch -14 NPT | 3/4 inch -14 |
| 1121-8 | | 1/2 inch -14 NPT | 1 inch - 11-1/2 |
| 1141-7 |  | 1.25 inch -18 NEF | 3/4 inch -14 |
| 1141-8 | | 1.25 inch -18 NEF | 1 inch - 11-1/2 |
| 1151-7 |  | 7/8 inch -22 NS | 3/4 inch -14 |
| 1151-8 |  | 7/8 inch -22 NS | 1 inch - 11-1/2 |
Flanged Union Connections - Cast Aluminum Only
| Series | Internal Thread |
|---|---|
| 1120-9 | 1/2 inch -14 NPT |
| 1140-9 | 1.25 inch -18 NEF |
| 1150-9 | 7/8 inch -22 NS |
