How to Write an RFQ for a Custom Hydraulic System
A strong RFQ for a custom hydraulic system should describe the machine function, load, motion, pressure, flow, duty cycle, environment, power source, controls, safety requirements, space limits, documentation, and acceptance tests. Better input leads to a better technical proposal.
System context
Vague RFQs lead to assumptions. Assumptions lead to change orders, wrong components, overheating, or late commissioning. A clear RFQ lets suppliers quote the system that will actually work.
Design decisions
| Topic | What to check | Practical response |
|---|---|---|
| Machine function | What the system must do | Describe sequence, loads, and operator actions. |
| Performance | Pressure, flow, speed, force | Provide target and acceptable tolerance. |
| Environment | Heat, dust, washdown, vibration | Define protection needs early. |
| Acceptance | How success is tested | Include pressure, speed, temperature, and leak criteria. |
Application fit
This topic most often appears in these hydraulic system contexts:
- Custom power units
- Machine retrofits
- Mining equipment
- Industrial automation
- OEM development
Practical checklist
- Attach sketches, photos, existing schematics, or machine layout when available.
- List operating hours per day and peak cycle frequency.
- State electrical supply, engine PTO, or available power source.
- Define ambient temperature, dust, water, corrosion, and vibration exposure.
- Ask for schematic, bill of materials, maintenance instructions, and test report.
Original field value: A good RFQ describes the job the oil must do, not just the components the buyer thinks are needed.
When this becomes a custom system discussion
If the application has unusual duty cycle, harsh environment, tight space, safety requirements, or repeated failures, document the operating data before asking for a design recommendation. A focused brief helps engineers size the system instead of guessing from a part number.
FAQ
Do I need a schematic before requesting a quote?
Not always. A clear function description and performance data can be enough for early engineering discussion.
What is the most important RFQ detail?
Duty cycle is often the missing detail that changes pump, motor, reservoir, cooler, and valve choices.
References and review notes
- Review component datasheets for pressure, flow, temperature, and cleanliness limits before final selection.
- Use machine schematics, oil analysis, and measured pressure or flow data for troubleshooting decisions.
- Follow applicable local safety rules and fluid power safety standards for commissioning and maintenance.