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Innovative Floating Seal Control Valve Solution for Spool Valve Fouling Issues

Spool valves are prone to failures due to contaminants, leading to high warranty costs and customer dissatisfaction. This innovative floating seal valve concept offers a solution to eliminate contamination-caused failures by allowing contaminants to flush through the valve with minimal resistance. The floating seal valve design includes a balancing of pressures to prevent spool-cylinder jamming. With features like overlapping polymer rings in o-ring grooves to minimize friction and excellent sealing performance, this solution is ideal for applications such as engine variable valve timing control and hydraulic systems. The valve is designed for both rotary and axial operations, providing versatility and reliability. Moretz Technologies, LLC, a veteran-owned business, offers this cutting-edge valve technology to address common issues faced in spool valve applications.

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Innovative Floating Seal Control Valve Solution for Spool Valve Fouling Issues

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  1. Control Valve with Floating Seal Solution to Fouling and Failures Common in Spool Valves

  2. Content • The Company • Moretz Technologies,. LLC • Rotary Valve Systems (RVS) • Rotary Valve Technologies (RVT) • The Technologies • The Concept • Existing Systems • RVT System • The Applications • Engine Variable Valve Timing Control • Hydraulic System • Pressure Regulator • Hydraulic Control

  3. PROBLEM • Spool Valves are frequently utilized to control and direct fluid flow In automotive applications such as transmissions and variable valve timing devices. These valves, because of the very tight clearances between the spool and the cylinder, are prone to failure resulting from tiny bits of contaminants being caught between the spool and cylinder. This results in considerable warranty costs and customer dissatisfaction.

  4. This problem is particularly troublesome in variable valve timing devices, as engine oil is considerably less clean than transmission fluid. The “floating seal” valve presented here eliminates contamination-caused failures.

  5. The following slides show the typical “Body” portion of the floating seal concept, a typical “Cover” portion designed for rotary operation, and a typical “Cover” portion designed for axial operation of the valve.

  6. Original Rotary Valve Cover

  7. Linear Motion Cover

  8. The “floating seal” concept utilizes a balancing of pressures on both sides of the seal assembly to allow contaminants to flush through the valve, and the valve sealing face to ride over particulates with little or no resistance.

  9. Initial Phaser Valve DesignThree Inserts per Valve O-ring Grooves Three Insert (min.) Phased Ports

  10. When the force provided by the actuating solenoid is limited, for axial operation, and when desirable for rotary operation, in order to minimize friction, the o-ring grooves are equipped with overlapping polymer rings, roughly analogous to piston rings. Testing has shown that the sealing is quite good, and friction is minimal.

  11. Section Through Inserts

  12. Section of Valve designed for VVT Control showing floating seals installed

  13. Rotary Valve (Designed for VVT Control)

  14. Rotary Valve shown in VVT Control Valve Body

  15. TransparencyThe previous illustration shows the valve installed in a currently-used VVT control valve housing. The solenoid used would be one that would provide complete transparency on the assembly line and in service, eliminating the risks often faced in changes to current systems. This valve would be completely interchangeable with the current valve.

  16. Moretz Technologies, LLC • 807 Airport Road P. O. Box 4031 Jackson, MI 49204 • 517-780-4002 M 517-206-3287 FAX 517-780-0950 • rdale@moretz.com • Moretz Technologies is in the process of becoming certified as a veteran-owned business.

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