"> Stal / Alfa Laval (Sweden) S/F Series
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Stal / Alfa Laval (Sweden)

S/F Series

Stal Refrigeration was a Swedish industrial refrigeration compressor manufacturer acquired by Alfa Laval in the 1990s. The S/F series was widely used on Scandinavian fishing ships and reefer carriers from the 1960s to 1990s. Production discontinued around 2000. Still found occasionally on older Scandinavian ships, but without OEM support. Successors: Sabroe/JCI or GEA/Grasso.

20-200 kW cooling
Capacity
R717 (Ammonia) / R22
Medium

Components & Design

Component data being added…

Technical Data

type Open-Drive Reciprocating Compressor
variant count approx 5
period start year 1960
period end year 2000
drive type Electric (external motor)
construction Cast iron, open-drive, inline arrangement

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Common failures & inspection points

Valve plate fatigue cracking
Shaft seal leakage on NH3 — chronic issue on older units
Cylinder liner scoring from insufficient oil
Foundation bolt loosening from vibration

Service & Maintenance

Valve overhaul every 5,000-8,000 hrs. Shaft seal inspection every 3,000 hrs (NH3). Complete overhaul 20,000-25,000 hrs. Obsolete — specialist service only.

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Replacement Parts

Stal brand discontinued — parts via Alfa Laval legacy service or reconditioning specialists. Lead time: 6-12 weeks. Some parts from used-unit stock.
Equipment Model #37722 · discontinued