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Shape memory alloy (SMA) valves
Compare our shape memory alloy valves
Dolphin Fluidics valves are mechatronic devices. Ultra-fine SMA wires, 100 to 200 microns in diameter, open and close the valve without the coils, plungers and springs of a solenoid. On our smart valves, the actuator works together with a 32-bit microprocessor that runs the control loop and with digital interfaces for IoT platforms. The antivacuum and mixing valves use the same alloy as a passive thermostatic element, with no power supply. Compare the eight models below to find the right valve for your application.
Smart HP Liquid valve
The Smart HP Liquid valve is a 2-way, normally closed valve with on/off and proportional closed-loop control, designed to dose and dispense liquids with high precision and no drift over time, even under high pressure.
Why choose it
- Pressure range up to 20 bar on liquids
- Proportional closed-loop control on board
- Hardware interface for external pressure, flow or temperature sensors
- Full-seal gasket for a perfect seal and high valve hygiene
- Quick-connect cartridge integrated in the valve
| Specification | Liquid | Air / Gas |
|---|---|---|
| Pressure range (min ΔP – max ΔP) | 0–20 bar | 0–4 bar |
| Flow | 0.05 (m³/h)/√bar | 0–30 l/min @ 1 bar |
| Control | Proportional in closed loop | Proportional in closed loop |
| Operating voltage | 5–24 VDC | 5–24 VDC |
| Communication and user interface | Analog, PWM, RS-485, I2C, status LED | Analog, PWM, RS-485, I2C, status LED |
Download the Smart HP Liquid valve datasheet See full Smart HP Liquid valve details
Digimed valve
The Digimed valve is a dual-channel, 2-way, normally closed, full-separation SMA valve designed for the health care industry. Its two independent channels provide proportional control of liquid, air or gas.
Why choose it
- All materials conform to ISO 10993
- Two independent channels for liquid, air or gas
- Proportional closed-loop control on board
- Full-seal gasket for a perfect seal and high valve hygiene
- Barbed ends for soft tubes
| Specification | Air / Gas | Liquid |
|---|---|---|
| Pressure range (min ΔP – max ΔP) | 0–4 bar | 0–4 bar |
| Flow | 0.23 (m³/h)/√bar | 0.23 (m³/h)/√bar |
| Control | Proportional in closed loop | Proportional in closed loop |
| Operating voltage | 5–24 VDC | 5–24 VDC |
| Communication and user interface | Analog, PWM, RS-485, I2C, status LED | Analog, PWM, RS-485, I2C, status LED |
Request the Digimed datasheet See full Digimed valve details
Digipinch Valve
The Digipinch valve is a pinch-type, normally closed shape memory alloy valve with on/off and proportional closed-loop control. The actuator regulates the force, and therefore the pressure, applied to the tube, so the valve never touches the liquid.
Why choose it
- No contact with the liquid, for clean and sterile handling
- Flow regulated by proportional control of the pressure on the tube
- Proportional closed-loop control on board
- Hardware interface for external sensors
- Stability and accuracy over time
| Specification | Liquid |
|---|---|
| Pressure range (min ΔP – max ΔP) | 0–2 bar |
| Flow | Depends on the tube used |
| Control | Proportional in closed loop |
| Operating voltage | 5–24 VDC |
| Communication and user interface | Analog, PWM, serial RS-485, I2C, status LED |
Request the Digipinch datasheet See full Digipinch valve details
Digisense Shape Memory Alloy Valve
The Digisense valve is a dual-channel, 2-way, normally closed, full-separation valve for liquids. Each channel has its own temperature probe and flowmeter, so the valve works as an integrated digital feeder or mixer with no external components.
Why choose it
- Integrated flowmeter and temperature probe on each channel
- Accurate dosing of fluids with different viscosities
- Mixing of two liquids with precise control of the outlet temperature
- No external components needed for regulation or control
- Full-seal gasket for a perfect seal and high valve hygiene
| Specification | Liquid |
|---|---|
| Pressure range (min ΔP – max ΔP) | 0–8 bar |
| Flow | 0.16 (m³/h)/√bar |
| Control | Proportional in closed loop |
| Operating voltage | 7.5–24 VDC or 24 VAC |
| Communication and user interface | RS-485, status LED |
Request the Digisense datasheet See full Digisense valve details
On/Off valve
The On/Off valve is a 2-way, medium-separated, normally closed SMA valve for dispensing and mixing air and liquids, when your application needs reliable on/off switching rather than proportional control.
Why choose it
- 10 times lighter than existing valves
- Power consumption 20 times lower than existing valves
- Reliable sealing system with medium separation
- NSF/FDA material compliance
- Patented design
| Specification | Liquid |
|---|---|
| Pressure range (min ΔP – max ΔP) | 0.2–2 bar |
| Control | On/off with end-of-stroke control |
| Operating voltage | 5–24 VDC |
| Communication and user interface | Analog, digital, status LED |
Download the On/Off valve datasheet See full On/Off valve details
EAV Valve
The EAV valve is a dual-channel, 2-way, normally closed, full-separation valve: channel 1 proportionally controls an air flow, channel 2 controls vapor or liquid.
Why choose it
- Air and vapor or liquid managed by a single valve
- Proportional closed-loop control on both channels
- Air filter integrated in the valve structure
- Two separate channels with quick-connect terminals
- Hardware interface for external sensors
| Specification | Air / Gas |
|---|---|
| Pressure range (min ΔP – max ΔP) | 0–2 bar |
| Flow (Kv) | CH1 air; CH2 gas/steam |
| Control | Proportional in closed loop |
| Operating voltage | 5–24 VDC |
| Communication and user interface | Analog, PWM, RS-485, I2C, status LED |
Download the EAV valve datasheet See full EAV valve details
Antivacuum valve
The antivacuum thermostatic valve restores atmospheric pressure inside a biphasic closed system and also acts as an air vent during the heating phase. Its shape memory alloy actuator reacts to temperature alone, with no further energy source.
Why choose it
- No electrical power required
- Can be installed in any position and orientation
- High-temperature techno-polymer body for repeatability and reliability
- Weighs only 12 g
- Materials compliant with EC 1935/2004 and NSF 51
| Specification | Value |
|---|---|
| Steam/water mix temperature – valve closed (no leakage) | > 99 °C / > 210 °F |
| Steam/water mix temperature – valve open (air flows in) | < 95 °C / < 203 °F |
| Boiler pressure – valve closed (no leakage) | 0.2 ± 0.1 bar / 2.9 ± 1.4 psi |
| Max boiler pressure | 2.5 bar / 36 psi |
| Max temperature | 140 °C / 284 °F |
| Nominal stroke | 2.2 ± 0.2 mm |
| Threaded inlet | G ¼ inch |
| Weight | 12 g / 0.03 lb |
Download the antivacuum valve datasheet See full antivacuum valve details
Mixing valve
The mixing valve for professional coffee machines blends hot water from the boiler with cold water from the mains to deliver water for infusions at the set temperature. A shape memory actuator adjusts the mixing ratio to compensate for changes in working conditions, with no power supply.
Why choose it
- Passive temperature control, no power supply
- Continuous setting of the mixed water temperature
- Accuracy of ± 2 °C / 3.6 °F
- No added complexity to the machine's hydraulic circuit
- Materials compliant with EC 1935/2004 and NSF 51
| Specification | Value |
|---|---|
| Hot component temperature | 110–135 °C / 230–275 °F |
| Cold component temperature | 5–35 °C / 41–95 °F |
| Mixed water setting range | 78–98 °C / 172–208 °F |
| Accuracy | ± 2 °C / 3.6 °F |
| Cold component working pressure | 1–9 bar / 14.5–130.5 psi |
| Threaded inlet/outlet | G 1/8 inch |
| Weight | 450 g / 0.99 lb |
Download the mixing valve datasheet
See full mixing valve details Find out more about our technology