Vibrating Pumps | Pump Coffee Machines
Vibrating pumps are common in low to mid-end domestic espresso machines and these pumps work on a vibrating electrical pulsation. As they are based on an electrical coil, vibrating pumps lose pressure over time or burn out completely, especially if they are allowed to run dry or constantly used under pressure such as prolonged black flush periods or very tight espresso extractions where the flow rate is heavily restricted. In these cases pumps will fail and need replacing.
Two main types (both do the same job, however use differing connections): Ulka: barb inlet and 1/8" female outlet, Fluidotech: 1/8" female inlet and outlet
Pressure cannot be changed without using a by-pass valve.
These vibrating pumps are not limited to espresso machines and also commonly used in smoke machines, concrete pumps and as cooling mist sprayers for intercoolers on race-cars.