BG4D line of oil hydraulic directional control valves now includes a built-in relief valve. They are designed for heavy-duty applications where low internal leakage is important and are available with lever, cam, air and oil pilot operation for flows to 100 lpm (25 gpm). They are rated for maximum pressure to 350 bar (5000 psi) and for maximum flows of 55 lpm (15 US gpm) nominal. Nine spool types and 16 modes of operation and 1⁄2 in. BSPP porting are available.
They are used across in marine, mining, construction and utility machinery for controlling the operation of hydraulic actuators, especially where low leakage is important.
Webster Instruments, Div. Webtec Products, (800) 932-8378, bit.ly/hp512webster