Used Vacuum Pumps›Edwards›Other
Edwards · Other
Edwards Diffstak 160 — oil diffusion pump, rotary backing
Original title: Edwards Diffstak 160 Vapour Diffusion Pump Rig w/ Pressure Gauge
📍 United Kingdom
Suitability for 1 × FD440
Not verifiedItem type
Not confirmed
Technical
Cannot calculate
Condition
Not evidenced
Data
Family only
🔴 Check carefully
Diffusion pump unsuitable as primary WAVE vacuum source; requires mechanical backing pump.
Condition from photo
Externally clean, control panel legible, hoses present, no visible oil leaks or corrosion observed.
Likely refurb / add-ons
- Backing pump (rotary vane, 2–5 m³/h) — €400–800
- Diffusion pump oil (Santovac 5 or equivalent, ~2 L) — €80–120
- Cold trap / baffle assembly — €150–300
Watch out for
- Diffusion pump is a two-stage system requiring a separate mechanical backing pum
- No backing pump visible in photos; system incomplete without one.
- Diffusion pumps are obsolete for modern freeze-drying; rotary vane or screw pump
WAVE AI estimate from photo + specs only — not a substitute for our physical pre-purchase check.
Specifications
- Type
- other
- Source
- eBay
- Listing #
- eBay #257546047402
- Last verified
- Aug 5, 2026
The Other family is recognised, but the exact variant is not supported. Model-specific performance and water-vapour figures from Other Edwards are therefore withheld.
Price history— Edwards Other
Family: OtherExact model is not supported by the listing or type plate.
Median €2.552 · 827 cleaned observations · €300–€15.345
Type plate (AI reading)
- Exact model
- Diffstak 160
- Manufacturer
- Edwards
- Type
- Rotary Diffusion
- Gauge
- Pirani 10 (0–10⁻¹ torr)
- Mains
- Visible on control panel (three indicator lights)
Auto-extracted from one of the listing photos. Verify on the real unit before purchase.
What to look for on this family
Generic Edwards vacuum pump — the exact model family was not detected automatically. Suitability remains unverified until the model or type plate is clear.
Traceable assessment
How each pump is assessed
AI helps read images and listing text. The final suitability result is calculated by a fixed engineering rule using evidenced values.
Method version: 5 August 2026
- 1
Identify the item
The title and photos are checked first to confirm that the listing is a complete vacuum pump — not an accessory, spare part or pump head only.
- 2
Establish evidence
The type plate and listing provide specific facts. Manufacturer values are used only for a confirmed model; family-level values stay clearly labelled.
- 3
Compare engineering data
Pumping speed, water-vapour capacity and ultimate pressure are compared with the selected WAVE machine and the chosen safety margins.
- 4
Assess condition separately
A photo or a seller saying “runs” does not replace a vacuum test. Unknown data remain unknown and never become an automatic green recommendation.