Consider the disconnected state.

Research record

The detail behind
the study.

Source-linked work for this revision. Reported checks describe the stated model or test; physical qualification and applicability to the current retrofit remain separate.

Six CAD-driven views of the removable spring-return cartridge. Development concept; isolation and manufacturing qualification remain open.

Review PDF · Assembly STEP · 3D model

Receiver / revised socket

Open / probe holds 12 mm lift

Closed / both socket seals engaged

Receiver withdrawn / valve remains

Cartridge / replaceable working parts

Tank integration / shallow case

This is a CONCEPT development package, with original Subfield artwork on actual CAD meshes. Physical isolation, hydraulic performance, materials and manufacturing qualification remain open.

CAD uses mm. GLB/Blender use metres. Receiver-local XY origin is tank [830,-475]; Z is already tank Z. The media origin is [830,-460,1100]. The new receiver return spout ends at X-150, the socket at X186. Its 65 mm negative-X / 10 mm negative-Y release preserves the 30 mm external handling allowance checked against the shallow tank.

The probe holds the poppet 12 mm open. Nominal spring-return closure occurs after 12 mm withdrawal, 1.5 mm before the downstream socket ring first becomes exposed. This is not a qualified tolerance budget, leak-tight closure, non-spill connection or seat verification. Establish the real service and isolation condition before any physical handling. Retained liquid and captured drainage remain unresolved.

The cartridge has a 32 mm throat, 6 mm stem, compressed radial/face seal studies and a preliminary helical spring. Its three-pin bayonet unlocks by 45 degrees, then withdraws 200 mm before lifting. The effective lock-pin inner radius is lock_socket.pin_inner_radius = 20.5 mm; the earlier inherited bayonet field is not used by this variant. Cartridge removal exposes the sleeve and requires separate chamber level/isolation. No live cartridge exchange, grade tool, full guide, lifting attachment or verified no-entry procedure is provided.

Nominal cap screws omit threads. Material/finish colors do not select an alloy, resin or elastomer. The ideal spring/load screen is not structural, fatigue, corrosion or isolation qualification. The open receiver still needs a complete abnormal EQ/backwater and untreated-bypass strategy, actual pumps/media, calibrated split, controlled final flow and protected service drains.

Complete material/process selection, dimensional tolerances, spring and seal manufacture, retention and joint qualification, drawings/tooling/inspection and physical approval before fabrication release. No production release is included.