Posted to News on 25th Sep 2008, 13:11
Diverter valves control two circuits from a single source
Hy-Pro is introducing a new range of diverter valves that enable two separate circuits to be controlled from a single hydraulic source, thereby avoiding the need for costly additional valves and hoses. The DDV valves are G1/2, six-port valves available in both manual and direct-acting solenoid versions, offering a simpler and more cost-effective alternative to conventional solenoid or proportional valves.
The DDV diverter valves build on the capabilities of earlier generations in the Hy-Pro range, but have been uprated to offer improved efficiencies. Both offer flows up to 60 l/min, with the manual version (DDVd) rated at 250bar and the solenoid-operated version rated at 210bar in standard form, or 300bar with a separate drain fitted. High-precision machined components and matched spools and bodies are claimed to give lower leakage rates (less than 10cc/min at 210bar) and higher pressure/flow characteristics than alternative products on the market.
A single four-way valve can control two double-acting cylinders or reversible hydraulic motors separately. The ability to switch between two independent operations can significantly increase system capability without incurring the significant extra cost associated with traditional products. The DDV range delivers this function cost-effectively because the design only enables one operation to be carried out at a time, which benefits a wide range of applications. These include tractors (lifting and then opening the bucket), recovery vehicles (tilting the bed and then operating the winch), road sweepers (driving the brush and raising/lowering it) and many others.
Both valves are manufactured from cast iron with a hardened and ground steel alloy spool, offering exceptional load holding capability. The spool is totally enclosed by the hand lever in the manual version and by the compact solenoid in the electric version, achieving a high degree of environmental protection as standard. A fully marine-rated version of the manual valve is also available.
For protection against accidental operation when the valve is not in use, a pilot check valve can be mounted directly onto the service ports.
The DDVd manual valve is available with either spring offset or detented spool locations. It uses the same enclosed lever as in Hy-Pro's sectional valve ranges, with standard, reversed and 90-degree action. Cable operation is also available. Further options include the fitting of a microswitch. The DDVed electric valve employs a 60W solenoid and is available for either 12 or 24V DC operation, using a standard DIN connector.
