Solenoid valve SCHAERER Spare Parts 3370079212

A solenoid valve controls the flow of water, steam or cleaning solution in professional coffee machines by converting an electrical signal into mechanical movement. When the 21 V DC coil is energised, it creates a magnetic field that pulls a plunger inside the valve body. The plunger lifts away from the seat, opening the passage and allowing fluid to pass. When the current is cut, a spring returns the plunger to its closed position, stopping the flow instantly. This on-off action is precise, repeatable and responds in milliseconds, making it essential for timed brewing cycles and automated cleaning programmes. To use the valve, connect the 21 V DC supply to the coil terminals and route the inlet and outlet pipes to the appropriate ports. The valve is normally closed, so fluid only flows when the control circuit sends power. No manual adjustment is needed; the valve opens fully when energised and closes fully when de-energised. The operator sets the timing and sequence in the machine's control panel, and the valve executes each step without further intervention. The valve body is moulded from PPSU, a high-performance polymer that resists heat, pressure and aggressive cleaning chemicals. The coil is encapsulated to protect against moisture and vibration, and the plunger assembly is sealed to prevent leaks. These materials ensure the valve operates reliably in the humid, high-temperature environment of a commercial coffee machine. The 21 V DC voltage matches the control circuits used in SCHAERER coffee equipment, allowing the valve to integrate directly with the machine's existing wiring and control signals. The compact footprint fits within the tight spaces typical of professional coffee machines, and the lightweight construction reduces strain on mounting points. The PPSU body and sealed coil resist steam and detergent cycles without corroding or swelling, so the valve remains leak-free after every washdown in a busy espresso station. The PPSU body can be wiped with food-safe sanitisers, and the sealed coil requires no maintenance. The valve should be inspected periodically for signs of wear or build-up on the plunger seat, but no disassembly is needed for routine cleaning. This solenoid valve is a direct replacement for the specified SCHAERER spare part number and fits the models listed in the manufacturer's compatibility charts.