Plug Valves TRIZ Cases

A pivotable actuating member aligns with a valve stem to automate manual shutoff valves.

A standing pipe faucet assembly uses a bolt and slantwise threaded hole to mechanically fix the outlet pipe.

A cam tube and rod convert linear plug motion into rotary signals for position indication.

Direct mounting of sealing elements in housing recesses reduces manufacturing cost while ensuring reliable retention.

A ceramic ball valve assembly uses a wiper to protect seats from abrasive contaminants, preventing leakage in railroad tank cars.

An integrated port through the valve stem enables fluid measurement while reducing assembly complexity and leakage risks.

Diamond-like carbon coating on trunnion ball valve surfaces reduces friction, maintaining sealing performance under high pressure.

A single-piece fluid control housing incorporates an assembly opening that doubles as a flow passage for direct component installation.

A valve limiter boss engages a bearing recess to hold the component, eliminating interference fits that complicate assembly and restrict miniaturization.

A non-magnetic latching servo actuated valve uses a DC servomotor and lead screw assembly to control the valve stem position without continuous power.

Straight internal porting and purge valve eliminate dead spaces to prevent coking deposits in turbine fuel systems.

Rotating the valve shaft adapts the handle position, eliminating inventory needs for separate left-side and right-side plumbing fixtures.

An involute-flexible collet clamps rectangular valve shafts, eliminating lost motion caused by backlash in rotary actuators.

A protective cap secures the rotating shaft via internal engagement means accessible through a top opening.

A rotary valve structure uses ceramic switching components to isolate water from metal housing surfaces.

A plug valve indicator mounts to the drive output member for accurate position tracking.

Replacing deteriorated o-rings with a dedicated seal on a corrosion-resistant stem prevents fluid leakage in locomotive cooling systems.

Threaded trunnion extensions adjust obturator seating pressure without disassembly, eliminating spring complexity and reducing maintenance time.

Helical guide slots in the rotary sleeve drive pins to move the central body, providing robust bearing support for harsh environments.

A valve positioner uses a concentric torsion spring and clutch ring to suppress backlash without penetrating the sealed enclosure.

Integrated compressible portion eliminates separate biasing components, reducing assembly complexity while maintaining sealing reliability.

A by-pass valve employs a single spherical closure member within a one-piece body to prevent leakage under mechanical stress.

Parallel ribbed bellows and thrust washers distribute high-pressure loads to reduce actuation torque while maintaining sealing integrity.

Segmented upper and lower valve bodies allow sealing assembly replacement without draining pipelines, reducing wear from solid particle obstruction.

A ball valve element uses an insertion bore to secure an impedance element within a fluid-flow passage.

Segmented pixel electrodes reduce leakage current and cross-talk by distributing voltage control across smaller units without complex doping.

A position sensor assembly detects input shaft configuration to provide actuator feedback signals.

A rotary valve cylinder assembly uses a torsion spring and handle to rotate the sealing element, providing stable mechanical engagement.

Upstream Coriolis flow meter and filter prevent debris blockage, ensuring accurate measurement for bottom hole pressure control.

Retracting nose seals via hydraulic piston prevents particulate damage and enables in-place maintenance.

An asymmetric C-shaped outlet aperture reduces the initial stroke angle required to open the valve while improving flow linearity.

Angled seat ring grooves accommodate dual-modulus seals, resolving incomplete mating surface contact in conventional rectangular profiles.

Segmented stem packing and asymmetric seal washers lower operating torque while preventing hydrostatic expansion damage from trapped liquids.

A rotating sleeve valve adjusts flow rates through radial apertures using hydraulic actuation.

Segmented plug sections with increasing diameters manage high-pressure fluid flow, reducing cavitation and noise while maintaining throughput.

A subcutaneous valve rotor uses a cam surface to modulate spring blade stress for fluid regulation.

A rotary valve sealing unit uses an integral elastic element to apply axial force for airtight contact.

Rotating coaxial cylindrical parts control gaseous fuel flow, eliminating valve seat wear from high contact forces.

A universal gas valve finishing flange assembly uses a threaded reducer nipple to adapt between different valve stem diameters.

Protrusions along the inner wall of a fluid regulator outlet create uniform flow patterns, resolving unpredictable pressure readings from downstream sensors.

Barbed cylindrical shanks create a friction fit with cross-linked polyethylene piping to eliminate adhesive use and reduce installation complexity.

Composite seal ring prevents blowout by maintaining compressive force via fasteners, reducing torque requirements.

Composite materials and segmentation enable Class IV shutoff above 550 deg F by reducing wear and friction.

Rotating gear ring varies hole size to adjust shock absorber hardness for vehicle stability.

A rotary valve employs a spring-biased passage member to counteract fluid pressure and prevent misalignment during assembly.

Extending the trunnion plate shoulder axially resists deformation and maintains seal reliability in wellbore ball valves facing high pressure differentials.

Rotating exterior shell with clasp seals coaxial cables inside an interior housing, preventing twisting and ensuring intrinsic safety in hazardous locations.

A valve connector uses a sealing gasket to grip corrugated hoses via radial contraction.

A ball valve sealing ring uses a resilient core with a curved cross-section to provide bending resistance.

A single-piece elastomeric sealing member anchors to a rotary valve rotor via integrated portions. This design ensures reliable fluid communication between ports.