Combo Check Valves
Product Number: V085510800
Combination check valves combine an umbrella inlet valve with a duckbill outlet valve. The VA3117 design is a general purpose combination valve with high umbrella cracking pressure to prevent flow-through below a design pressure.
Materials of Construction
- Part Number: V085510800
- Product Group: Combination
- Material Number: VL22M26
- Material Type: Nitrile
- Material Color: Black
Design Characteristics
Working Principle
One use is as a single elastomeric part serving as both valves for a reciprocating pump. See the depictions to the left. Another use is as a simple 2-port, bi-directional valve with different vent pressures in each direction. Examples of applications are venting for car lighting and for gearboxes.
Mounting Instructions
Combination valves snap into a plate using an undercut in the rubber. This plate my also have features to keep the umbrella inlet area separate from the duckbill outlet. Please contact Vernay to obtain a seat drawing for this design.
Photo/Rendering
Technical Drawing
Performance Characteristics
Opening Pressure
Duckbill Side Diagram
Umbrella Side Diagram
Definition
Opening Pressure is defined as the differential pressure at which the forward flow through the valve reaches the flow threshold. Opening Pressure will increase as the flow threshold is increased, and will decrease as the threshold is decreased.
Reverse Leakage
Duckbill Side Diagram
Umbrella Side Diagram
Definition
Leakage, or flow in the reverse direction, is measured while increasing the backpressure across the valve, starting from zero. Please note that leakage graph is on a different scale from those of flow.
Forward Flow
Duckbill Side Diagram
Umbrella Side Diagram
Definition
Flow and differential pressure are measured simultaneously while increasing the inlet pressure, starting from zero. After reaching a maximum flow, the pressure is reduced to zero while measuring flow and differential pressure. The chart shows the minimum and maximum flows measured during the tests of multiple samples at each pressure.
Vernay Quality Policy
Vernay is committed to the highest level of quality and service to our customers. We focus on innovation and continuous improvement in all areas of our business and accomplish these goals through our quality management system. Maintain our existing quality certifications (ISO/IATF-16949, ISO 9001, and ISO 13485).