Filling Valve ZSFW200F0-1-2X/V/01D40 - Bosch Rexroth R901408973

On presses with large cylinder volumes it is the filling cross section that sets the rapid stroke time, not the pump rating. The pilot-operated ZSFW200 prefill valve in size 200 releases up to 7000 l/min and then blocks at pressures up to 350 bar.

Benefits

• Throughput of up to 7000 l/min fills even a cylinder holding several hundred litres during the rapid stroke.
• Seat valve design blocks the filled chamber so the pressing pressure of up to 350 bar can build.
• A pilot stage opens the main element while the actuation itself stays mechanical and needs no electrics.
• FKM seals widen the range to higher oil temperatures, hydraulic fluid HL is intended.
• Sandwich plate design to ISO 228-1, two ports in two switching positions.
• This version has a mass of 135 kg and is built onto heavy cylinder heads.

Applications

The valve is used in deep-drawing, forging and plastics presses whose upper ram is filled from the tank during the rapid stroke. It sits between tank and cylinder head and handles both the filling and the blocking during the pressing stroke. Plan lifting gear for the 135 kg during installation.

Manufacturer

Bosch Rexroth builds this valve under material number R901408973. Quote that number when ordering and keep it in the spare parts list of the machine.