Valves Types
Reference data and engineering information about valves types for fluid mechanics applications.
valvestypes
Overview
Engineering reference data for Valves Types in fluid mechanics.
Key Formulas
Reynolds Number
Ratio of inertial to viscous forces — determines flow regime.
Bernoulli's Equation
Conservation of energy for steady, inviscid, incompressible flow.
Continuity Equation
Conservation of mass for incompressible flow.
Darcy-Weisbach
Pressure drop due to friction in a pipe.
Variables
| Symbol | Description | Unit |
|---|---|---|
| Reynolds number | — | |
| Fluid density | kg/m³ | |
| Flow velocity | m/s | |
| Characteristic dimension | m | |
| Dynamic viscosity | Pa·s | |
| Pressure | Pa | |
| Darcy friction factor | — |
Valve Types and Applications
The following table categorizes different valve types based on their primary applications in engineering systems.
19 rows
Valve Type | Application Description |
|---|---|
| Flow regulating valves | For controlling rate of flow. |
| Temperature regulating valves | For controlling fluid temperature in a system. |
| Automatic process control valves | For controlling rate of flow relative to value. |
| Anti vacuum valves | An automatic type of air valve preventing the formation of vacuum in tanks or pipelines. |
| Blow down valves | A valve which is used for cleaning sludge from a boiler. |
| Bulkhead valves | A gate valve. |
| Free ball valves | A valve in which a ball is free to rotate in any direction. |
| Fusible link or fire valves | A fire prevention valve which has a weighted lever held open by a wire & fusible link which melts at an increase of room temperature. |
| Hydraulic valves | A control valve for water, oil, or hydraulic systems. |
| Jet dispersal valve | A valve incorporating an element by virtue of which the energy within the emitting jet is dissipated. |
| Penstock | A single faced type of valve consisting of an open frame & a door used in terminal positions only, typically located in tanks or channels for controlling flow into a pipe. |
| Plate valves | A gate valve incorporating a sluicing effect. |
| Radiator valves | A valve controlling the flow of water through a radiator. |
| Rotary slide valve | A valve in which a rotation of internal parts regulates flow by opening or closing a series of segmental ports. |
| Rotary valve | A spherical plug valve in which the plug rotates through 90°. |
| Solenoid valve | A valve operated by an electrical solenoid. |
| Spectacle eye valve | A parallel slide valve. |
| Thermostatic mixing valve | A valve which combines temperature. |
| Throttle valve | A non-tight closing butterfly valve. |
Source: engineeringtoolbox.com
Key Valve Operation Principles
- Rotary Valves: Typically require a 90° rotation of the plug or disc to transition between fully open and fully closed positions.
- Solenoid Valves: Use electromagnetic force from a solenoid coil to actuate the valve, allowing for remote or automated control.
- Fusible Link Valves: Provide passive fire protection; the link melts at a specific temperature (e.g., 165°F / 74°C), allowing the valve to close automatically.
- Anti-Vacuum Valves: Open inward to allow air into a system, preventing the formation of a vacuum that could cause collapse or damage.