Valve Flow & Performance Tables
Detailed technical data for understanding and selecting valves based on flow characteristics, pressure-temperature limits, and operational requirements.
Cv (Flow Coefficient) Chart for Gate, Globe, Ball, and Butterfly Valves
The Cv value represents the flow capacity of a valve. Use this chart to compare different valve types and sizes.
| NPS | Gate Valve Cv | Globe Valve Cv | Ball Valve Cv | Butterfly Valve Cv |
|---|---|---|---|---|
| 1 | 30 | 10 | 50 | 45 |
| 2 | 120 | 40 | 200 | 180 |
| 4 | 500 | 180 | 850 | 750 |
| 6 | 1200 | 450 | 2000 | 1800 |
| 8 | 2200 | 800 | 3800 | 3400 |
Pressure-Temperature Rating Tables (per material & class)
Understand the maximum allowable working pressure at various temperatures for different valve materials and pressure classes.
| Material | Class | Temp (°C) | Max Pressure (bar) |
|---|---|---|---|
| A105 | 150 | -29 to 38 | 19.6 |
| A105 | 150 | 100 | 16.5 |
| A105 | 300 | -29 to 38 | 51.1 |
| A105 | 300 | 100 | 43.1 |
| SS316 | 150 | -29 to 38 | 19.6 |
| SS316 | 150 | 200 | 13.8 |
Torque Requirement Charts for Valve Operation
Estimate the torque required to operate different valve types and sizes, crucial for actuator selection.
| Valve Type | NPS | Operating Torque (Nm) |
|---|---|---|
| Ball Valve | 2 | 20-40 |
| Ball Valve | 4 | 80-150 |
| Butterfly Valve | 2 | 15-30 |
| Butterfly Valve | 4 | 60-120 |
Orifice Size vs Flow Rate Table
Relationship between orifice size and flow rate for various pressure drops, useful for flow restriction applications.
| Orifice Diameter (in) | Pressure Drop (psi) | Water Flow (GPM) |
|---|---|---|
| 0.5 | 10 | 15 |
| 0.5 | 20 | 21 |
| 1.0 | 10 | 60 |
| 1.0 | 20 | 85 |
Valve Sizing Calculator (Cv, Kv, Flowrate, DP)
An interactive tool to calculate valve sizing parameters based on your process conditions. (Placeholder for future interactive tool)
This section will host an interactive calculator. For now, please refer to the Cv charts above.