Publish Time: 2023-07-21 Origin: Site
Keister Hydraulics is pleased to introduce its newly developed T7 vane pumps for variable speed drives.
The unique technology of theses hydraulic pumps is allowing a wide range of operating speeds, to take the maximum benefits of modern power transmissions. When driven with asynchronous or synchronous electric motors and piloted by frequency controllers, they operate in the most efficient and reliable ways, generating maximum energy savings.
Up to 70% less electric Energy for the E Motor and less or no cooling for the hydraulic equipement.
Lower noise level.
Lower total cost of the hydraulic system
Smaller pump, less valves, less or no cooling, smaller fluid tank, increased lifetime for the components.
These T7 hydraulic pumps have been designed especially for variable speed drives and are offering a wide speed range. Like all our T7 Series vane pumps, the performances do remain very stable over time, making these pumps an ideal solution for modern electro-hydraulically operated machines.
The fully pressure balanced concept increases the pump lifetime over its full operating range while double lip vanes reduce the sensitivity to fluid pollution.
The Keister Vane Technology allows very low noise levels over the entire operating range and during the whole life of the pump.
With several displacements for the same installation size , the T7 are a very powerful and compact pumps.
The various pumping units (cartridge kits) can also be combined with other pumping unit sizes in multiple pumps. This creates a wide range of multi flow pumps, very much adapted to the high power needs.
Our fixed displacement pumps, when driven at variable speeds, may operate in hydraulic open loop circuits with various control modes.
The pump flow is varied according to the speed command signal of the drive unit. The necessary pressure limitation is achieved by a pressure relief valve in a classic way.
The pump flow is varied according to the speed command signal of the drive unit which also offers the ability to switch in pressure control mode. This mode requires fast pressure sensors, a servomotor with high dynamics, as well as a fast drive unit. The necessary pressure limitation is achieved by the pump and motor unit that only deliver enough fluid to limit the pressure to the set value. A pressure relief valve remains necessary, but as a safety device only. This control mode may require a specific circuit design.