What is the difference between Series 47 Model 01 and Series 47 Model 11 Needle Type Globe Valve
The Series 47 Model 01 has a one-piece stem, while the Series 47 Model 11 has a two-piece stem. The Series 47 Model 11 offers longer life and better sealing for lines that require frequent opening and closing. The downside is that the Series 47 Model 11 is much more expensive than the Series 47 Model 01.
