Circuit Maker Solutions

Screw-in cartridge valve packages for applications up to 350 bar (5000 psi) and 300 L/min (80 USgpm)

Circuit Maker Products are pre-engineered packages. These packages are designed with from 2 to 4 screw–in cartridge valves for generic, repetitive circuit control functions.

All circuit maker products are rated at 210 bar (3000 psi) and have either SAE or BSPP port options. Our selection of Circuit Maker pre-engineered packages consists of the following basic units:

• Single and multiple pump control packages
• Solenoid actuated relief valve packages
• Flow control packages
• Cross port relief packages
• Cross port relief with shuttle and solenoid vent
• Pressure sensitive regeneration packages with and without load locking
• Motor mounted counterbalance valve
• Motor mounted PO check valves
• Motor mounted relief valves

Typical applications

Circuit Maker packages can be used in a wide variety of stationary and, on and off highway applications. The are designed to solve a multitude of repeatable, generic application requirements that are encountered in day to day hydraulic circuits. These packages are ideal solutions for specialty machine requirements and low volume options on high volume applications.

Pump control packages

These are suitable for any single or multiple pump application where individual pump output flow does not exceed 228 l/min (60 USgpm). They are used to provide air-bleed, start-up and relief protection.

Solenoid actuated relief valve packages

These can be used wherever remote relief or venting control is required for flows up to 300 L/min (80 USgpm). Normally open versions lend themselves to markets where fail safe and “dead man” control are important. Normally closed versions lend themselves to markets such as machine tool, where energy savings can be obtained by selective unloading of pump flow.

Flow control packages

These packages are used with both fixed and variable pump systems to provide constant output flow for the main or branch circuits. Packages offered provide for maintaining either:

• Cylinder or motor speed; free reverse flow for table positioning, conveyor systems and presses.
• Controlled flow for steering systems.

Cross port relief valve packages

These packages are used with bi-directional actuators. The circuit maker provides actuator protection from overload conditions.

Pressure sensitive regeneration packages

Pressure sensitive regeneration packages provide a means of extending a cylinder as fast as possible without additional pump flow by diverting rod end flow to the head end to accelerate the load. When the pressure in the head end reaches a predetermined level related to the load, the valve closes off and the cylinder returns to normal speed. Typical applications are for outriggers/ stabilizers in mobile markets and machine tool traverse in industrial markets.

Pressure sensitive regeneration packages with load locking

Pressure sensitive regeneration packages provide a means of extending a cylinder as fast as possible without additional pump flow by diverting rod end flow to the head end to accelerate the load. When the pressure in the head end reaches a predetermined level related to the load, the valve closes off and the cylinder returns to normal speed. The load locking feature provides stability as the system is now working with an oil column under pressure in addition to the mechanical structure. Typically used with mobile crane and other similar vehicles to ensure stability when swinging loads. This package has an advantage over alternative systems that use solenoid actuated blocking pins. In the event of a power failure, it is still possible to lower the vehicle/load.

Features and Benefits

• Quick solutions that are ready to use
• Quick delivery at low cost
• Flexibility

Quick solutions

Circuit Maker packages are pre-engineered packaged solutions for generic, repeatable requirements. They have specific coil voltage, coil connector, flow settings adjustment and pressure setting adjustment options that permit tailoring to application requirements.

Quick delivery/low cost

Circuit Maker packages have already been engineered to satisfy generic, repetitive circuit needs. There are no scheduling or time related problems, or engineering charges to be recovered.

Flexibility

Screw-in cartridge valves and housings are sold either separately or as pre–assembled packages. This permits last minute assembly of packages and local tailoring of individual valve options.