About hydraulic pumps and solenoid valves, seeking experts to recommend brand models

Standard solenoid valve only 6 diameter and 10 diameter two kinds, 10 diameter reliable flow is 80-100 liters, now the oil pump flow up to 130 liters, you must use the electro-hydraulic reversing valve, that is, the solenoid valve to do the pilot, the hydraulic reversing valve to do the main valve.

Require such high reliability, use the best brand, Germany Rexroth or American Vickers can be. Suction and closure 100 times is not a problem, many valves can do. Hydraulic oil must be strictly controlled oil temperature and cleanliness to prevent the valve spool from jamming.

For this highly reliable system, I would recommend a shut-off valve type directional valve, also known as a seat valve (set vavle), which is a bit more reliable than a spool valve (spool vavle), and the spool is less likely to jam.