Begin with the equipment receiving hydraulic power.
A hydraulic power unit should be described in relation to its consumers. List each connected device and its operating pressure, required flow and duty cycle. State which functions may operate at the same time so the supplier can understand the simultaneous demand.
Explain the utilities and installation.
Provide the actual electrical voltage, frequency and available power. Describe the installation envelope, access for maintenance, connection positions, lifting or handling needs, ambient temperature and any marine or hazardous-area requirements.
Information to include in the RFQ.
- A consumer list with pressure, flow and simultaneous operation.
- Hydraulic schematic and interface or port requirements, where available.
- Oil type, temperature limits and specified cleanliness requirements.
- Reservoir, filtration, cooling and monitoring requirements.
- Operating/standby pump expectations and control interfaces.
- Noise, enclosure, corrosion protection and documentation requirements.
Confirm what the reference values describe.
System flow, circuit flow and motor power are different pieces of information. A catalog’s total flow should not be read as the available flow at every outlet. Ask how the offered configuration distributes flow and what operating conditions its stated performance covers.
Define testing and handover.
Where inspection or factory acceptance records are required, specify them before comparing quotations. Include the required drawings, component lists, manuals, spare-parts information and any witness points in your document list.
Explore OEIL hydraulic equipment. For an existing installation, nameplate images and a clear hydraulic schematic are useful additions to an equipment enquiry.