The working principle of high pressure pumps for waterjet cutting is based on the so called pressure intensification. The oil pressure generated in the hydraulic drive is increased to an operating pressure up to 420 MPa, in accordance with the surface ratio of the low pressure piston on the oil side to high pressure plunger on the water side.
Pumps of series ECOTRON® and HYTRON® are available. Depending on pump type the operating pressure is continuously adjustable up to 420 MPa. Flow rates of 0.8 up to 7,6 l/min are provided, with power ratings from 7.5 to 75 kW.
For pure waterjet and abrasive waterjet cutting all required tubings and fittings as well as waterjet valves, abrasive heads and abrasive dosing systems are available.
ECOTRON® High Pressure Pumps
ECOTRON® series is a modular pump design and allows to adapt the high pressure pump system to individual customer needs. An extensive range of options is available.
The basis of the ECOTRON® series is a high pressure pump with hydraulic drive, pressure intensifier, accumulator, pre-pressure filter unit and high pressure bleed down valve which are mounted together on a base frame.
The basis of ECOTRON® high pressure pumps consists of hydraulic drive with oil/water cooler. The pressure adjustment is done manually via hydraulic pressure control.
Following options are available
Sound isolated housing - if the high pressure pump is free accessible and not installed in an separate pump room, for sound protection and safety reasons a sound isolating housing has to be mounted.
High pressure pumps of HYTRON® series are particularly suited for waterjet applications, designed as a turn-key. All components required for an efficient operation of the high pressure pump are fully integrated into a sound insulated housing.
The high pressure pump comes with an operating panel with LCD-touch screen. All warning and monitoring functions are shown in plain text. The pressure set value is continuously adjustable from 50 to 400 MPa.
Available are pumps with flow rates of 1.2 at 350 MPa and 1.9 / 3.4 / 3.8 / 4.3 / 6.0 / 7.6 l/min at 400 MPa and corresponding power rates from 11 to 75 kW.
HYTRON® high pressure pumps are built according to machinery standard 98/37/EG and pressure equipment directive 97/23/EG. The declaration of conformity is a part of the documentation. All high pressure pumps of this series are marked with CE.
System Diagram of Series HYTRON®
Highly dynamic controls, long life expectancy
The hydraulic units used are characterized by highly dynamic controls. Use of a soft-switching hydraulic valve with specially designed control geometry guarantees extremely short switch-over times.
Targeted reduction of pressure fluctuations. Depending on the flow rate, the integrated accumulator has a large storage volume of up to 2.49 liters. This reduces pressure fluctuations to a minimum and thus prevents wear on the high pressure system. For larger flow rates, the pump is fitted with two intensifiers. Strokes are electronically controlled, which in turn helps to prevent pressure fluctuation.
Safety and operation
As option are available: If the feed water supply pressure is less than 0.3 MPa, an optional booster pump is available to increase the water pre-pressure.
Stand-by Intensifier – for increasing of redundance there are the posibility to instal a second intensifier. The switch-over time from one to the other intensifier is less then a minute and will be take place manually.
In addition there are more detailed solutions for temperature and leakage monitoring as well as for pump synchronisation (master/slave), Profibus-DP and remote maintenance via modem available.