VALVES & PIPING / INTERACTIVE 3D

Swing-check valve

Inspect the hinged disc, annular seat, pivot, hollow connections and access cover.

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Seat-adjacent geometric pose · Disc position is independent of pressure and flow. No opening pressure, leakage or valve timing is simulated.

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COMPONENT INSPECTOR

Explore the assembly

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Choose a component55 individually named components

Internal / mechanicalIllustrative connections / regionsStructure / enclosure

Colors identify parts in this teaching model. They are not an industry color standard.

HOW TO READ THIS MODEL

The system, explained.

A swing-check valve uses a hinged disc to permit flow in one direction and resist reverse flow. Forward flow can lift the disc from its seat; the disc can return toward the seat as conditions change. Compare the stationary seat and pin with the moving disc and arm, then use the position slider to inspect their geometric relationship. A check valve differs from a manually operated gate valve.

Model scope and limits

Original generic body-mounted hinge concept with hollow passages, a separate disc, seat, bushings, access gasket and fasteners. Invented proportions; no OEM dimensions, pressure rating, qualified sealing/retention, threads, cracking pressure, slam/transient calculation or flow capacity. Disc position is independent of pressure and flow. Chamber-envelope and centreline geometry checks are not full collision or engineering qualification.

Further reading: SLB: how check valves work ↗

Source links support further study; no affiliation or endorsement is implied.

CHECK YOUR UNDERSTANDING

Which illustrated group pivots around the stationary pin?

Disc and hinge armInlet flangeAccess cover

GUIDED COMPONENT STUDY

Trace the system.

Read each explanation, then focus its component in the explorer. This is a learning route through the model, with no operating or maintenance sequence.

Distinguish a check from a manual closure
The solid disc pivots across a passage rather than translating on a handwheel-driven stem. Forward flow can lift a real swing-check disc and changing conditions can return it toward the seat. This independent slider supplies neither those forces nor their timing. Compare the separate gate-valve lesson to recognize a different closure mechanism.
Look through the stationary seat
The annular seat has a clear centre bore beside the disc. Its face identifies the neutral contact boundary in this invented geometry. There is no leakage, contact-stress, lapping, retention or material qualification.
Follow the hinge arm
The arm connects the back of the disc to a bored eye above it. Disc, arm, eye and attachment boss pivot together around one stationary pin. The teaching pose range is arbitrary and establishes no actual opening angle or service condition.
Separate the eye from its support
Two stationary support blocks and bushings straddle the moving eye. The pin passes through their geometric bores. The model depicts a body-mounted hinge concept; other check-valve constructions differ. Bearing fit, wear, lubrication and qualified pin retention are omitted.
Trace the two connections
Two hollow axial necks meet bores in the chamber wall. The inlet lies on the seat side and the outlet on the chamber side. A ray through their centres is a geometry check only; no area, pressure-loss, flow capacity, installation orientation or piping design is qualified.
Inspect the access boundary
A separate rectangular annular gasket sits between the body and a closed cover, with eight illustrative fastening positions. Reveal internals removes the body and cover visually. Joint material, thread engagement, preload and safe access are outside this component lesson.
Recognize the limits of the enclosure
The original chamber has a top opening, two process bores and blind cover-fastener pockets. Its box-like proportions make the component relationship readable. Sampled moving-vertex envelope checks do not replace full collision, casting, stress, pressure-containment or transient analysis.

Additional primary references: Spirax Sarco: check-valve concepts (steam context) ↗

ACCESSIBLE COMPONENT REFERENCE

Every part, in plain language.

Search all components ↗Model provenance ↗

Check body

Hollow chamber with two axial bores and an open top access joint. Invented teaching proportions; no pressure rating, verified fit or material specification.

Check seat

Separate annular seat beside the hinged disc. Contact stress, lapping, retention and leakage are unspecified. Invented teaching proportions; no pressure rating, verified fit or material specification.

Inlet neck

Open connection toward the valve chamber. Invented teaching proportions; no pressure rating, verified fit or material specification.

Inlet flange

Annular connection flange with six bored fastener positions; adjoining pipe, gasket and joint qualification are absent. Invented teaching proportions; no pressure rating, verified fit or material specification.

Inlet stud 1