It’s always better to go for European standards and also machines with ISO certification. Another very important thing is the type of pulsator used in milking machines. The pulsator latest type is pneumatic oil free ones (electronic pulsators are there for large herds and not for small herds.) Carefully observe how many teats of the cow is getting pressed at a time. Poor quality pulsators black in colour (have plastic covering )without metallic lid on top, produce the sound of old charcoal driven trains like pusc, pusc.... not tik, tik,. When you milk by hand, how many teats will you press at a time?
Never try milking machines which works in any other method as it lacks pulsation and works by keeping the teats of the cow open during the entire milking time which is wrong and it allows the entry of germs and bacteria inside the teats resulting in getting mastitis as end result for the cow. Imported milking machines has 30 litre SS milking cans having pneumatic pulsators,oil free and no monthly expenses like buying oil for the machine, a recurring expenditure. Never buy machines produced in countries, from where we get throw away type irreparable tape recorders and DVD players. If you love your cow, you must buy a good machine. You can buy any good brand provided you are sure of the country of origin. Ask them where it is coming from? Some are ashamed to tell the country of origin / the place of manufacturing – because its very old technology .