Stem Seal Design & Operating Data (Download PDF)
Quick Reference Data
| Approximate | Operating | ISO Flange | ||||
| Valve Size | Flow (Cv) | Torque (Lbf.in.) | Weight (lbs) | FO4 | FO5 | FO7 |
| 1/4 - 1/2" | 12 | 35 | 1.5 | x | x | |
| 3/4" | 32 | 50 | 1.8 | x | x | |
| 1" | 57 | 80 | 2.4 | x | x | |
| 1.25" | 80 | 120 | 3.6 | x | x | |
| 1.5" | 104 | 250 | 5.6 | x | x | |
| 2" | 240 | 300 | 8.2 | x | x | |
High Performance Stem Seal Design
- An adjustable V-Ring design creates a multiple seal between the stem and body.
- Each stem assembly is composed of three V-Rings providing a very high cycle life by resisting creep and cold flow.
- The Thrust Washer adds a secondary seal, reduces torque and prevents galling.
- The beveled stem packing/thrust guide provides an additional level of performance and sealing and completes the
High Performance design.
