Valves and Orifices

Variable-area components for fluid flow control

Use these blocks to model orifices, valves, and valve actuators in the two-phase fluid domain.

Simscape Blocks

Directional Control Valves

4-Way 2-Position Directional Valve (2P)	4-Way 2-Position Directional Valve in the two-phase fluid domain (Since R2024b)
4-Way 3-Position Directional Valve (2P)	4-way, 3-position directional valve in the two-phase fluid domain (Since R2024b)
Check Valve (2P)	Check valve in a two-phase fluid network (Since R2021a)

Flow Control Valves

Thermostatic Expansion Valve (2P)

Flow control valve that maintains evaporator superheat

Pressure Control Valves

Pressure Relief Valve (2P)	Pressure relief valve in a two-phase fluid network (Since R2021a)
Pressure-Reducing Valve (2P)	Pressure-reducing valve in a two-phase fluid network (Since R2021a)

Valve Actuators and Forces

Multiposition Valve Actuator	Multiposition actuator in any fluid domain
Proportional Valve Actuator	Power-controlled valve actuator in any fluid domain

Orifices

Orifice (2P)

Constant- or variable-area orifice in a two-phase fluid network (Since R2021a)

Topics

Building a Custom Valve
Model a custom valve with orifice blocks.

Featured Examples

Residential Air Source Heat Pump

Models an air source heat pump system that is used to heat a residential building having hot-water radiators for heat distribution. The two-phase fluid refrigerant takes up heat from the environment moist air mixture and transfers heat to water. The compressor drives the R410a refrigerant through a condenser, a thermostatic expansion valve, and an evaporator. An accumulator ensures that only vapor returns to the compressor.

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Residential Ground Source Heat Pump

Models a ground source heat pump system that is used to heat a residential building having hot-water radiators for heat distribution. The ground source heat pump uses R410a, a two-phase fluid refrigerant, as the working fluid. The heat pump takes up the naturally existing heat stored in the ground and transfers the heat to the hot-water radiators. The compressor drives the refrigerant through a condenser, a thermostatic expansion valve, and an evaporator. An accumulator ensures that only vapor returns to the compressor. A receiver ensures that only liquid returns to the thermostatic expansion valve.

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