The major advantage of compressed air-driven hydraulic pumps comes from the fact that they only function when their performance is really needed. This feature is commonly called ‘power on demand’ because such pumps slow down and stop cycling when the air pressure balances the oil pressure through the intensification ratio. For instance, when the actuator in the circuit is not moving, the pump is not cycling. When the directional control valve in the system opens the path from the pump to the actuator, the pump starts up automatically to provide the fluid flow needed to extend the actuator in its work. When the work is done, the directional valve blocks the pathway and the pump stops. It is as simple as that – power on demand! Just think how much energy is saved in a clamping application, a filter press, or a tire press where the pressure is sustained for minutes or hours with only system leakage to be made up.
Spartan’s Solenoid Valve Dosing Pumps
The Spartan Scientific Series SSDP15 high precision, fixed volume, fluidic diaphragm solenoid pump is an inert miniaturized pump in an environmentally resistant package that features a fully encapsulated solenoid design offering flying leads, AMP Faston crimp, or industry-standard quick connector with or without indicator lights. The SSDP15 features a flexible-use form factor interface for a manifold with O-ring static seals or single-use models using 1/16” tubing. This self-priming pump draws a low 3.5 watts and is available in 24VDC. The SSDP15 can dispense up to 10.5 mL/min continuous duty cycling at 5 Hz. The maximum cycle rate is 6 Hz and is designed for 20 million cycles of service. It has been designed from the ground up to work within the rigorous environments of scientific and medical industries that employ the need for finite control of fluids.