The Q41F is a flanged floating ball valve for quarter-turn isolation in industrial piping. The ball is held between its seats rather than supported by trunnions; line pressure presses it toward the downstream seat to form the seal.
The cast steel configuration shown below combines a WCB body with PTFE seats. The specification and dimensional table provide the main details for comparing this model with your piping requirements.
Floating Ball Valve Q41F 150LB- WCB Cast Steel - ANSI API
Series: Q41F floating ball valve
Body: WCB cast steel
Connection: flanged
Seat: PTFE
Nominal size: NPS 1/2–8
| Ball Valve Model (API) | Nominal Pressure (Mpa) | Test Pressure Strength(Mpa) | Test Pressure Seal(Mpa) | Temperature | Range of use |
|---|---|---|---|---|---|
| Q41F-150LB | 2.0 | 3.0 | 2.2 | -29~150 ℃ | water, gas, oil |
Floating Ball Construction
The floating ball moves slightly under line pressure, bringing it into contact with the downstream seat. PTFE seats provide the sealing surfaces around the ball, while the quarter-turn stem connects it to the operator.
Flanged ends allow the valve to be bolted into the pipeline and removed for maintenance. The dimension table below supports installation planning and comparison with existing valves.
Farpro supplies Q41F floating ball valves for project procurement and replacement work. Send us your valve specification or required size and quantity for a quotation.