1CEBL556 BoomLoc valves - Hose burst protection, flange mounted with independent pilot control ISO 8643

1CEBL556 - BoomLoc valve

Hose burst protection, flange mounted with independent pilot control (Ref. ISO 8643) 550 L/min (145 USgpm) • 400 bar (5800 psi)

Description

These overcenter valves are suitable for use on the boom and dipper cylinders of an excavator to help the manufacturer or user comply with standard ISO8643. They were designed to give relief, load holding and hose failure protection to systems where a pilot system controls the directional valves.

Operation

By connecting the hose rupture valve pilot in parallel with the directional spool valve pilot, and adjusting the opening characteristics of the hose rupture valve to suit that of the spool valve “BoomLoc” may be set so as not to interfere with the normal operation of the machine. Fine adjustment of the pilot pressure permits the optimum setting to be made in differing operating systems. Both the pilot and the relief sections are unaffected by back pressure, enabling the service line relief’s to operate normally. In the event of hose failure, the control will be passed from the main spool to the “BoomLoc” valve, maintaining control of the cylinder. Regardless of the load the pilot pressure requirement remains constant as the valve is unaffected by load induced pressure, the poppet being fully balanced with zero differential area.

Features

This is a compact design with good dirt tolerance. Hardened poppets and seats provide excellent load holding characteristics with all the advantages of the cartridge insert.

Performance Data

• Cavity: x
• Flow Rating: x
• Typical Pressure: x