Pressure Relief Valve DBW30B3-5X/315-6EG24N9K4/12 - Bosch Rexroth R978916728

A hydraulic circuit needs a dependable ceiling so that pump, lines and actuators are never loaded beyond their rating. Pressure relief valve DBW30B3-5X/315-6EG24N9K4/12 holds that ceiling as a pilot-operated seat valve in size 32 and relieves a flow of up to 650 l/min to tank.

Benefits

• Pressure setting range 4 to 315 bar on a lockable rotary knob with scale, so the chosen limit stays protected against unauthorised adjustment.
• Maximum operating pressure 350 bar, which leaves headroom in the valve above the 315 bar setting range.
• Flow up to 650 l/min at a weight of 6.3 kg, mounted directly on a subplate to ISO 6264-10-17.
• Seat valve design with two switching positions and two ports, the closed position seals permanently.
• Electrical unloading at 24 VDC through a 3-pole connector (2 + PE) according to EN 175301-803.
• NBR seals for HL hydraulic fluid.

Application

The valve typically sits in the pump line of large presses, injection moulding machines and metallurgical plants that move 650 l/min. Electrical unloading takes the circuit to zero pressure during standstill without stopping the pump. The lockable knob suits installations in which the set value has to stay documented.

Manufacturer

Bosch Rexroth lists the valve under material number R978916728. Characteristic curves, port dimensions and installation notes are given in datasheet RE 25802 and the matching brochure RE 25802-B.