Stainless Vacuum Distiller Chamber CAD (Countertop Size) Ended

Project Brief (What I Need Designed)
I need a simple stainless steel vacuum chamber and external coil layout for a small countertop water distiller. This is ONLY the mechanical shell and mounting points, no internal electronics or special internals.

Please design:

Main Chamber

Material: SS304

Shape: Vertical cylinder

Outer diameter: 250 mm

Height: 300 mm

Wall thickness: 2 mm

Bottom: flat, welded

Bottom plate:

4 × M6 threaded inserts arranged in a square, centered, on the inside bottom (for a removable heater plate, you just place the holes).

Bottom drain:

1 × 1/4" NPT drain port at the lowest point, oriented downwards.

Inlet (Feed Water Nozzle Port)

Location: Side wall, 80 mm above bottom (centerline).

Connection: 1/4" NPT female threaded boss welded to side wall (I will install my own spray nozzle).

Steam Outlet / Vacuum Port

Location: Top center of the lid.

Connection: 1 × 25 mm OD stub pipe, 50 mm long, vertical.

This will serve as both steam outlet and vacuum connection (to be connected to my external condenser/piping).

External Coil Mounts (Preheat Coil Around Chamber)

Around the outside of the cylinder, please add simple guides/tabs for a 1/4" copper tube coil:

4 vertical “ears” or tabs spaced at 90° around the circumference, with slots or holes so I can tie/clamp a 1/4" tube coil to the outside of the chamber.

Coil height region: from 50 mm above bottom to 250 mm (do not interfere with ports).

Top Lid / Access

Design the top as a removable lid:

Either a clamped flange or bolt ring.

Include a circumferential groove or flat for an O‑ring (I will specify seal later).

Lid must seal under light vacuum (~200 mbar absolute).

Steam Path Mount in Lid

On the underside of the lid, directly under the 25 mm outlet, add:

A simple circular flat area (about 60 mm diameter) with 4× M4 through holes around it, 90° apart, on a 40 mm pitch circle.

This is for mounting my internal insert (you don’t design the insert, just the mounting pattern).

Supports / Feet

Add 3 or 4 simple short legs or base pads so the chamber stands stable on a flat surface.

Total unit height including feet: roughly 320–340 mm.

Deliverables

3D model: STEP (.step) and native file (SolidWorks / Fusion / Inventor).

2D manufacturing drawings (PDF + DWG/DXF) with all key dimensions, tolerances suitable for sheet metal/fabrication.

Exploded view or simple assembly drawing showing lid, body, and coil mounts.

Notes

Treat all internals as generic: no need to design heaters, coils, or special internals.

Design for ease of fabrication by a typical stainless steel shop.

This is for vacuum distillation, so avoid sharp internal corners where stress may concentrate; use reasonable fillets. read less