PRP-08W-2C-Y-Z-A1 Winner Hydraulics Inverse Proportional Relief Valve, 30 L/min
The Winner Hydraulics PRP-08W-2C-Y-Z-A1 is a pilot-operated, spool-type, inverse balanced proportional relief valve for the 08W-2 cavity. It is the reverse-function counterpart to the PRP-08W-2C-Y-Z-B1. With no command signal it holds its high pressure setting, and as coil current increases the relief pressure falls in inverse proportion. Rated for 30 L/min, it gives a compact, single-cartridge solution where a circuit must default to high pressure when the electrical signal is absent.
How the PRP-08W-2C-Y-Z-A1 Works
The valve blocks flow from port 1 (P) to port 2 (T) until pressure at port 1 overcomes the spring force. Energising the coil reduces the effective spring force, which lowers the valve setting. So the more current applied, the lower the relief pressure; at zero current the valve returns to its highest setting.
Technical Data – PRP-08W-2C-Y-Z-A1
| Specification | Value |
|---|---|
| Valve type | Pilot-operated, spool-type, inverse balanced proportional relief valve |
| Function | High pressure setting with no command |
| Cavity | 08W-2 |
| Thread | 3/4″-16UNF-2A |
| Rated flow | 30 L/min (7.9 gpm) |
| Max. operating pressure | 240 bar (3400 psi) |
| Valve hex size | 24.0 mm (15/16 in) |
| Installation torque | 25–35 Nm (18–26 lbf-ft) |
| Max. leakage | Approx. 30 cc/min at 70 bar (1000 psi) |
| Reseat | Exceeds 85% of cracking pressure |
| Hysteresis | < 8% with DC input; < 4% with dither |
| Linearity with dither | < 2% |
| Recommended dither | 100–250 Hz (best 140–200 Hz) |
| Coil | EC-16B, 26 W, 16 mm tube (ordered separately) |
| Weight | 0.207 kg (without coil) |
High Pressure Adjustment Ranges (Y)
| Y code | Adjustment range |
|---|---|
| W | 350–210 bar |
| A | 210–105 bar |
| B | 105–55 bar |
| D | 55–20 bar |
The customer must specify a relief setting within the selected range when ordering.
Option (Z)
- L: standard type with leakproof hex socket adjustment screw
Features
- Inverse proportional function: high pressure at zero current, lower pressure as current rises
- Complete 30 L/min relief valve, with no separate main stage required
- Pilot-operated spool design in the compact 08W-2 cavity
- Leakproof hex socket adjustment screw as standard
- 26 W EC-16B coil on a 16 mm tube
- Continuous-duty rated coil with efficient wet-armature construction
- < 4% hysteresis and < 2% linearity with dither
- Heat-treated, high-precision ground working parts
- WINNERcoat® zinc-nickel plating, salt-spray tested to DIN EN ISO 9227 for up to 1000 hours
- Pressure rating tested to NFPA T2.6.1, with 90/90 fatigue rating assurance
- 100% functional test before shipment
- Range of seal kit materials available
Winner recommends a current-sensing amplifier with dither for best performance.
PRP-08W-2C-Y-Z-A1 vs. PRP-08W-2C-Y-Z-B1
| Feature | PRP-08W-2C-Y-Z-A1 | PRP-08W-2C-Y-Z-B1 |
|---|---|---|
| Function | Inverse: high pressure with no command | Standard: low pressure with no command |
| Pressure as current rises | Decreases | Increases |
| Rated flow | 30 L/min | 30 L/min |
| Max. operating pressure | 240 bar | 350 bar |
| Z option | L (leakproof adjustment screw) | N (non-adjustable) or P (manual override) |
| Weight (without coil) | 0.207 kg | 0.196 kg |
For an inverse proportional pilot (1 L/min) in the same 08W-2 cavity, see the PRA-08W-2C-Y-Z.
Buy the PRP-08W-2C-Y-Z-A1 Winner Hydraulics
Atlantech Drives supplies genuine Winner Hydraulics proportional relief valves worldwide, with fast shipping. Tell us the adjustment range (W, A, B or D), the required relief setting and the coil voltage, and our commercial team will quote the PRP-08W-2C-Y-Z-A1 and its EC-16B coil with availability and lead time. Request your quote today.
