Pulsation Settings and Milking Performance

Pulsation is the rhythm of the milking machine: a milking phase followed by a rest phase. When it is set and maintained well, cows milk out comfortably and teats stay healthy.

Key points

Pulsation alternates milking and rest phases so teats can recover.
Rate and ratio settings should follow the manufacturer and your technician's advice.
Worn parts and uneven stalls are common causes of trouble.
Liners and settings need to work as a match.
Keep test reports and notes on teat condition in one place.

What pulsation actually does

Inside the liner, the pulsator alternates between vacuum on both sides, which lets the liner open and milk flow, and vacuum only on the inside, which lets the liner collapse around the teat. That collapse is the rest phase, and it gives the teat a chance to drain blood and fluid.

Without a good rest phase, teats can become congested and sore. With too little milking time, cows may milk out slowly or incompletely.

Rate and ratio in plain words

Two terms come up often. Pulsation rate is how many cycles the pulsator completes in a minute. Pulsation ratio is the share of each cycle spent in the milking phase compared with the rest phase.

Manufacturers publish recommended settings for their equipment and liners. I will not give numbers here, since the right values depend on your system. Ask your dealer and technician what is set on your farm, why, and how it was verified.

Phases and what can go wrong

A pulsation cycle has four parts: the opening of the liner, the milking phase, the closing of the liner and the rest phase. Problems in any of them can change how the unit feels to the cow.

Failures often come from worn or dirty pulsators, kinked or cracked pulsation hoses, leaks, and mismatched parts. Mixed pulsator types or hoses of different lengths on the same system can give uneven performance between stalls.

Slow or uneven milking between stalls
Teat ends that look swollen or discolored
Cows that kick or shift during milking
Noisy or irregular pulsator sounds

Liners and pulsation work together

The liner shape, material and age change how pulsation feels on the teat. A worn liner may not collapse properly and can behave like a different setting altogether. Replace liners on the schedule recommended by the manufacturer.

When you change liner types or brands, ask your technician whether pulsation settings need to be reviewed. A good match between liner and settings protects teat ends.

Testing and record keeping

Pulsation should be checked as part of your routine system test. A qualified technician can measure each pulsator and report on the phases, rate and ratio. Ask for a copy of the results and compare them with the manufacturer's recommendations.

Keep a binder with test reports, repairs and part replacements. When cell counts or teat-end scores change, you can look back at what changed on the machine.

Results for every stall, not just an average
Dates of pulsator service or replacement
Notes on any changes to liners or settings

Common mistakes

Changing settings because a neighbor did, ignoring uneven stalls, and putting off pulsator service are common errors. Another is treating pulsation as a one-time setup when it needs regular attention.

Do not adjust equipment that you are not trained to adjust. Follow manufacturer instructions and lockout procedures for powered equipment, and bring in a qualified technician for changes.

Watching cows and teats for feedback

Your best day-to-day test is cow behavior and teat condition. Look at teat ends before and after milking, watch milking time and note any cows that stand awkwardly or kick more than usual.

Share what you see with your technician and veterinarian. Specific notes, such as which stalls, which cows and which shift, help them find the cause faster.

When to get help: Ask a qualified milking system technician to test and adjust pulsation, and involve your veterinarian or milk quality adviser if teat-end damage or cell counts change. Follow label or veterinarian withdrawal times exactly for treated cows.

Sources and further reading

Organization homepages are linked so you can search them for current guidance on this topic.

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