Check Valves TRIZ Cases

Combines backflow prevention and threshold-based flow restriction in one compact body to limit outflow when a pressure drop signals line rupture.

A thermally contracting metal seal replaces brittle elastic seats in cryogenic check valves, improving sealing while reducing cost and chattering.

An enlarged annular wall compresses against the conduit end to create a leak-tight seal despite wider valve-to-conduit tolerances.

A two-piece poppet captures the resilient seal to stop washout during abrupt pressure drops and maintain reliable flow interruption.

A mushroom-shaped EGR non-return valve cuts pressure loss and opens at lower pressure differences without spring elements.

A pressure-responsive septum limits excessive vacuum flow to protect blood and other shear-sensitive fluids while maintaining collection speed.

A drillable grate-and-anchor ball deflector keeps balls out of the sheath bore, preserving fluid and cement flow in float collars.

A single-material plunger seals and controls bag valve flow while allowing the valve assembly and bag to be recycled together.

A movable lever and lost-motion rocker arm prevent hydraulic lash adjuster overextension during engine braking while preserving valve operation.

A curved valve chamber and deflecting umbrella head keep particulates out of the seal, preventing IV check valve leaks and backflow.

A cartridge-mounted control piston and check valve ball regulate oil flow in the rocker arm to improve engine brake timing, lash control, and retarding power.

A dual-passage air pipeline uses a check valve and spring-loaded switch valve to control airflow direction and hold cavity pressure during use and disassembly.

A pre-assembled vacuum breaking module fits into the valve body, enabling individual component sales, easier assembly, and lower fabrication cost.

A narrowed transfer passage compresses air out of the water line, improving meter accuracy and preventing charges for undelivered water.

Reversible check inserts in a dual union drain valve simplify installation in tight plumbing layouts while preventing backflow and water hammer.

Resilient pivot bushings let a swing check valve flapper self-align with the seat, improving sealing despite tolerances and low pressure.

A check valve in the electric oil pump passage blocks air entry during pump stop, reducing leakage and restoring fast oil discharge on restart.

An annular-groove hinge and radial lips raise check pressure while keeping flow pressure low and preventing air ingress during closure.

Offset baffles create a convoluted vent path that releases tank gases while limiting fluid loss, clogging, and deformation.

A stopper-actuated flapper valve prevents fish from blocking the seat, reducing damage and maintaining vacuum pump efficiency.

A set screw adjusts spring tension to tune check valve cracking pressure, enabling one-way downhole flow across changing operating conditions.

A guided poppet, shielded spring, and low-adhesion sealing surfaces help gas lift backcheck valves resist scale and prevent backflow.

A flow metering orifice stabilizes poppet pressure in a check valve, reducing chatter, wear, and rapid opening-closing cycles.

Integrated test ports and transverse cartridge buckets cut backflow valve size, parts, and servicing effort while preserving reverse-flow protection.

A low-profile drain trap seal uses venting, gasket stability, and a movable seal to fit shallow assemblies while limiting evaporation, odors, and backflow.

A check-valve vent in the hose coupling equalizes hydrant pressure for full drainage, helping prevent freezing and germ formation.

A soft one-way valve in the air passage lets inhalation pass but closes on exhalation to stop saliva and reverse airflow from contaminating the atomizer.

A threaded valve disk and air-gun adapter keep fingers out of the bearing tube aperture while safely releasing air from pneumatic core shafts.

A wavy annular metal seal replaces elastomers in a check valve to maintain fluid-tight sealing and seat preload at higher temperatures.

A rotating guide and retainer assembly shields guide screws from pressure and reaction forces, reducing blowout risk in high-pressure axial flow check valves.

Separating the valve body and plugging portion avoids narrow-port assembly, reducing errors while improving sealing and stability.

A curved valve head matches the chamber ceiling to keep particulates from lodging, maintain inlet sealing, and stop IV backflow.

Conformal stop surfaces and flapper bumpers spread contact stress to cut wear, noise, and hinge-pin loading in aerospace check valves.

Two staged poppets with separate cracking pressures improve subsea pressure relief reliability when corrosion, fouling, or debris cause single-point failures.

A sloped aperture and curved metal or ceramic valve member maintain vacuum sealing in hot, corrosive environments without elastomer seals.

A plate-shaped one-way valve blocks blood reflux in infusion lines, maintaining smooth medical fluid delivery and preventing catheter blockage.

A membrane vent paired with a one-way relief valve enables rapid gas escape during pressure spikes while blocking liquid and solid contaminants.

A gravity-biased reset knob lets the clapper close without a separate spring, reducing wear and improving dry pipe valve reliability.

A downstream pressure receiving portion closes the valve before atmospheric air reaches it, protecting vacuum pump bearings and rotors.

Corrugated disc grooves redirect seat flow into small chambers to add upward force, cut relief valve simmer, and stabilize low-pressure opening.

A separated spring and damper chamber layout boosts damping force, suppresses check valve chattering, and limits pressure loss.

Conformal stop surfaces and bumpers spread flapper impact loads to cut wear, noise, hinge pin stress, and valve weight.

A self-closing outlet and isolated external spring keep food pumps sanitary, prevent corrosion, and support flexible assembly.

A helical-slit piston and integrated silver, gold, or copper agents improve fluid flow paths while limiting microbial growth in access port valves.

An elastic shutter safety valve relieves excess outlet pressure when an aerator clogs, protecting tap fittings and water supply pipes.

Overflow channels deform a cap-shaped closure wall to open flow with lower resistance while maintaining stable backflow sealing and cleaner valve geometry.

A separate valve seat and guided disc reduce particle buildup and collision noise while preserving cryogenic sealing integrity.

Integrated cover venting with labyrinth seals relieves overpressure while keeping electropneumatic field devices compact, modular, and moisture-protected.

A heat-defeatable barrier holds a pressure-biased piston open, then fails in fire to stop fuel flow and prevent rupture during vehicle fueling.

A guide pin and sleeve in the inflow chamber stabilize shutter motion, prevent backflow, and keep check valve flow regulation compact.