When the original valve is obsolete, first reconstruct its function and installation requirements. A candidate should be compared against evidence, not selected from appearance alone.
Send the original reference: Include the complete model code, quantity, destination and available photos or drawings.
Build the original reference record
- Complete model and order numbers
- Readable nameplate and all-side photos
- Hydraulic symbol or machine schematic
- Mounting face, port and envelope dimensions
- Voltage, connector and manual override
Separate must-match and adaptable fields
| Field | Normally must match | May be adaptable with engineering review |
|---|---|---|
| Hydraulic function | Spool symbol, center condition and controlled ports | Pilot arrangement only if the circuit is redesigned |
| Installation | Mounting interface and safe pressure rating | Envelope, connector direction or plumbing |
| Electrical | Supply type and voltage | Connector style with approved rewiring |
| Performance | Required pressure, flow and fluid compatibility | Response or leakage only when the application permits |
Document the decision
- Original reference and proposed model
- Data sources used
- Known differences
- Required customer changes
- Sample, commissioning and approval plan
Manufacturer names, trademarks, and model numbers are used for identification and cross-reference purposes only. Compatibility must be confirmed for each application.