Overall, proportional valves are used in applications that require moderately accurate control of hydraulic fluid. They fall into three types: they control and vary pressure, they control flow (speed) and they control fluid direction.
The control source can be moved "proportionally," meaning it can be stopped in a number of positions, rather than the full ON-OFF of a directional valve. As a result, a proportional valve creates a smooth transition of fluid direction within a system, from one port, to equal pressure in both ports, to flow in the other port.
Because they can be responsible for controlling a positively loaded cylinder, a hydraulic motor, hydraulic pressure within a system, or accurately maintaining the amount of pressure within a system, a proportional valve failure can bring a major portion of your operation to a screeching halt.
Proportional Valves are sized according to the size of the port or flange connections, and they are rated at gallons-per-minute or with reference to a standard mounting pattern. Paragon Technologies has the fully qualified, experienced technicians who can bring any of them, and your operation, back to life quickly and reliably.
Repair Procedures:
- Visual inspection and evaluation on test stand for initial comparison to manufacturer's specifications.
- Valve is disassembled into individual parts.
- Every part is chemically cleaned with solvents.
- Torque motor is dismantled down to wires and magnets.
- All parts are inspected and checked, to ensure they are within manufacturer's tolerances and specifications.
- Failed parts are replaced with original manufacturer components.
- LVDT's are fully tested and flow or pressure calibrated.
- Valve body is inspected to ensure it is within manufacturer's tolerances.
- Body spool assembly is also checked for wear.
- If needed, body and/or body spool assembly is replaced with new Viton seals from the original manufacturer and a new filter from the valve manufacturer.
- Torque motor and body are reassembled and tested to 100% of the performance specifications for flow and pressure established by the manufacturer.
- Once tested to manufacturer's specifications, a test report and computer plot is included with the repair.
Brands We Repair:
- Abex
- Atchley
- Bosch
- Dynamic
- Moog
- Oilgear
- Parker
- Pegasus
- Rexroth
- Sunstrand
- Vickers
- and many more