valveless


Also found in: Dictionary, Thesaurus, Idioms, Encyclopedia, Wikipedia.

valve·less

(valv'les),
Without valves; denoting certain veins (for example, portal) that are not provided with valves as most veins are.
References in periodicals archive ?
FMI OEM pumps integrate FMI's unique patented CeramPump valveless pumping principle with precision stepper control.
The prior local pooling within valveless, thin-walled epidural veins ruptured following the fluctuations of the pressures.
Practice valveless harmonic series major arpeggios (overtones 4, 5, 6, 8; i.
Colin Furze, who has put together a valveless pulse jet, a propulsion device sometimes used by hobbyists to power model aircraft and other remote-controlled vehicles, is now building a gigantic pair of human buttocks to house his machine, the Verge reported.
Pumps provide a valveless rotating/reciprocation piston design that eliminates the need for check valves, which can clog, leak or fail over time.
FMI's OEM Duplex Metering Pumps consist of two FMI valveless pump heads direct coupled to a single variable stepper motor drive.
FMI's OEM duplex metering pumps consist of 2 FMI valveless pump heads direct coupled to a single variable stepper motor drive.
By degrees the impact of the electronics was to throw up sounds more or less familiar from Kerbaj's acoustic practice -- valveless aspirations, the squawks of irritable pterodactyls flying overhead -- with new noises.
The KOS pump type is a valveless, two--cylinder piston pump that is suitable for conveying all kinds of thick media with a high solids content.
Although their tone and playing styles were different, KE[micro]se and Baborak were a harmonious pair, ably executing the unusually virtuoso writing for 18th century valveless horns.
They were clear enough in this Haydn and Beethoven programme: violins left and right with cellos in the middle (all sparing in their use of vibrato), valveless brass, and dynamic levels suitably tempered to classical proportions.