KUGELHAHN

The 049 103 57 BALL VENTIL (4910357, 491-035-7, BALL VENTIL 4910357) is a mining-duty hydraulic shutoff valve engineered for Sandvik drilling rigs, ROC series machines, and underground jumbos. The 049 103 57 BALL VENTIL provides precise on/off flow control, isolating hydraulic lines and maintaining stable circuit pressure during drilling, feed, rotation, and lubrication operations.

This 049 103 57 BALL VENTIL is built from corrosion-resistant, high-strength steel with a precision-machined spherical closure element designed to withstand extreme pressure, hydraulic oil exposure, abrasive mining dust, and continuous vibration. OEM identifiers 4910357 and 491-035-7 ensure compatibility with official Sandvik spare-parts documentation.

The 049 103 57 BALL VENTIL regulates hydraulic pathways in drifter assemblies, feed cylinders, manifold blocks, and lubrication circuits. Its quarter-turn actuation enables rapid and secure switching, preventing pressure spikes, backflow, and unintended hydraulic load on pumps, seals, and actuators.

Inspect the 049 103 57 BALL VENTIL for leakage, seat wear, handle stiffness, corrosion, or pressure decay. Replace 491 035 7 immediately if sealing integrity or switching reliability deteriorates.