Valves and Orifices

Variable local restrictions for fluid flow control

Use these blocks to model orifices and valves in the gas domain.

Simscape Blocks

Orifices

Flow restriction in a gas network

Directional Control Valves

2-Way Directional Valve (G)	Controlled valve with two ports in a gas network
3-Way Directional Valve (G)	Controlled valve with three ports in a gas network
4-Way 3-Position Directional Valve (G)	Controlled valve with four ports in a gas network
Check Valve (G)	Check valve in a gas network
Pilot-Operated Check Valve (G)	Check valve with control port in a gas network

Flow Control Orifices

Ball Valve (G)	Ball valve in a gas network (Since R2023b)
Poppet Valve (G)	Poppet valve in a gas network
Gate Valve (G)	Gate valve in a gas network
Temperature Control Valve (G)	Temperature control valve in a gas network

Pressure Control Valves

Pressure Reducing Valve (G)	Pressure reducing valve in a gas network
Pressure Relief Valve (G)	Pressure relief valve in a gas network

Valve Actuators and Forces

Multiposition Valve Actuator	Multiposition actuator in any fluid domain (Since R2020a)
Proportional Valve Actuator	Power-controlled valve actuator in any fluid domain (Since R2020a)

Topics

Modeling Directional Valves in Simscape Fluids
Selecting and parameterizing directional control valves in Simscape Fluids.
Building a Custom Valve
Model a custom valve with orifice blocks.

Featured Examples

Vacuum Booster

Model, parameterize and test a vacuum booster. The model is used to generate the plot between applied and generated forces for the brake vacuum booster.

Open Model

Models a hydrogen refueling station. Hydrogen is stored in low-pressure storage tanks at 200 bar at the station. A 3-stage intercooled compressor maintains the necessary pressure in a cascade buffer storage system so that the station is ready to dispatch hydrogen to any connected vehicles. The buffer is divided into high-pressure tanks at 950 bar, medium-pressure tanks at 650 bar, and low-pressure tanks at 450 bar. To avoid wasting compression energy, the lowest pressure buffer that is greater than the vehicle tank pressure is used to dispatch hydrogen. Priority valves switches between the different buffer tanks to control which buffer tanks to fill and discharge from.

Open Model