Micropump's Series PF valveless piston pump helps reduce clogging and allows consistent metering and dosing of even soft-solid containing fluids. It features a reciprocating and rotating piston, which allows smooth, accurate and repeatable delivery, says the company. With flow rates to 1 L/min. and pressures to 6.89 bar, the pumps are offered in a small package size with a variety of mounting options.