The RPEI combines an electro-proportional adjustable pilot stage and high-capacity main stage to provide precise pressure control inversely proportional to the input electrical current. The pressure setting at zero current is also manually adjustable to allow the system designer to fine tune the RPEI to their specific system requirements.
In fan drive applications, the RPEI electro-proportional inverse relief valve delivers smooth, precise changes in pressure to the fan drive motor to maintain the desired fan speed while also acting as a full flow relief valve for system safety in the event the fan motor stalls. The RPEI defaults to the maximum pressure setting to ensure the fan drive continues to cool in the event of electrical power or signal loss to the XMD driver or valve coil.
- 25 gpm (95 L/min) flow capacity
- Available in two nominal-pressure settings:
- "A" range - 3000 psi (210 bar). Manually adjustable from 900 to 3000 psi (60 to 210 bar). Requires 740 Series low-power coil.
- "W" range - 5000 psi (350 bar). Manually adjustable from 2000 to 5000 psi (140 to 350 bar). Requires 740 Series high-power coil.
- Designed and tested to 5 million on-off operational cycles
- Standard zinc-nickel plating for 1000-hour salt fog protection
- Fully compatible with Sun's XMD valve drivers for applications requiring closed-loop control
