Rexroth Counterbalance Valve la fel

Rexroth Counterbalance Valve la fel

Rexroth Counterbalance valve is a modulating valve that not only acts as a load holding brake but is also able to maintain control over a load in motion. This is especially important in mobile applications, where an "over-center" load can make a cylinder over-speed the pump. The load tries to move quicker than the desired flow rate.

Rexroth counterbalance valve will only open enough to allow a load to move at a desired flow rate ensuring the load will not "run away" due to external forces, such as gravity. So, unlike a P.O check valve, a counterbalance valve can provide full flow for hoisting while metering flow to provide controlled lowering.

Another key difference and advantage to a counterbalance valve is its relief characteristic. In cylinders with high bore / rod ratios thermal expansion on the cap end can cause pressure on the annular side to rise beyond yield strength of the material which results in an intensification failure. This may materialize as a ballooned barrel, a collapsed rod, a blown-out gland or seal – or a combination of eșecuri .

Dacă cilindrul este proiectat cu o supapă de contrabalansare atât pe partea extinsă, cât și pe retragere, contrabalansa retrage se va deschide odată ce presiunea va ajunge la setarea supapei și va permite reducerea presiunii prin supapa de control . Dacă cilindrul nu este proiectat cu un pilot pentru a deschide robinetul de control, presiunea nu poate fi eliberată, deoarece nu există niciun fel de relief sau nu se va ridica la eșantionare sau la eșantionul de eșantion apare .

In applications where there are large swings in ambient temperature, such as desert locations, thermal expansion can cause cylinders equipped with pilot operated check valves to lock in position – even when commanded to move. Our hydraulic valves can replace Rexroth counterbalance valve well. Meanwhile we supply with hydraulic orbital motor, hydraulic pumps, hydraulic valves, direction control valves, Supape de control al debitului, supape de control al presiunii, seria de supape proporționale, supape de contrabalansare hidraulică și supape de control pilot operat cu multe fabrici de mașini de construcție .

Tag-uri populare: Rexroth Counterbalance Valve La fel, China Rexroth Controbalance Valve Same producători, furnizori, fabrică