Edwards Speedivac EO2 — vapour diffusion pump

🔴 Check carefully

Diffusion pump unsuitable as WAVE freeze dryer vacuum source; requires backing pump.

Condition from photo

Exterior clean, mounted on frame with control panel, pressure gauge visible, electrical cord present, no obvious leaks.

Likely refurb / add-ons

• Backing pump (rotary vane, 2–5 m³/h): €400–800
• Exhaust filter & silencer: €80–150
• Isolation valve & cold trap: €200–400

Watch out for

• Vapour diffusion pump cannot operate standalone; requires dedicated backing pump
• No visible nameplate or model designation on pump body in photos.
• Ultimate vacuum and pumping speed not specified in listing.

WAVE AI estimate from photo + specs only — not a substitute for our physical pre-purchase check.