Spools
When a work function such as a cylinder or motor is connected to a work section, a spool can be used to change its speed (by adjusting flow) or its power output (by adjusting pressure buildup). A spool is chosen to match a work section's activation method, and each is equipped with a spring that returns it to a neutral position when power is disrupted.
Features and benefits
- Flow control of work ports for speed control
- Pressure control of work ports (e.g., for load holding valve operations)
- Blocked neutral position for holding pressure on work port
- Drained neutral position to bleed work ports (e.g., for load holding valve operations or motor braking)
- Open neutral position for running off inertia of motor and reduce back pressure
- Symmetrical or asymmetrical flow to suite cylinder ratio
- Individual flow for each work port—both P --> port and port --> T—to suit any application
Applications
- Agriculture
- Construction
- Material handling
- Road building
- Forestry
- Cranes
- Mining
- Municipal vehicles
- Marine
Specifications
| Variant/family | PVG16 | PVG32 | PVG48 | PVG100 | PVG128 | PVG256 |
| Max work port flow l/min (US gal/min) @350 bar [5,076 psi] | 65 [17.2] | 125 [33] | 180 [47.5] | 240 [63.4] | 320 [84.5] | 500 [132.1] |