Гидравлический клапан свободного хода и блокировки Hägglunds VFW-VHLCA Bosch Rexroth

Description Valid for Hägglunds motor CA100 S.015, CA100 S.042, CA140 S.015, CA140 S.042 Maximum flow 1000 l/min Maximum pressure 350 bar Open loop hydraulic system Features Compact and robust design Possible for remote pilot control of check valves Free wheeling and lock function Directional valve with detent function Protects the motor from overspeed at drilling applications Product description The valve is designed to be used with Compact motors type, CA100 S.015, CA100 S.042, CA140 S.015, CA140 S.042. Intended use of the valve is for two speed operation using free-wheeling of one part of the motor and for locking of the motor ports at a jammed drill string in a drilling application. The valve is suitable for open loop operation with tensioned load applications. A system is required to ensure that the motor is stationary before switching from free-wheeling position into drive position. The valve is equipped with a pilot operated pressure relief valve (3) and (4) in each motor line which can relieve flow into the opposite motor line. The pressure relief valves is adjustable within a certain pressure range and will be delivered with a pressure setting of 350 bar. A hydraulically controlled spring return spool valve (2) allows one part of the motor to drain out to tank at freewheeling operation. The spool valve (2) is operated via an electrically controlled directional valve (5) with detent function in all positions and a pilot operated, 3-way directional valve (6). With the solenoid of the valve (5) de-energized the spool (5) remains in the last switched position. The pilot pressure to valve (6) can be adjusted within a pressure range of 7 ... 210 bar. At free wheeling the case pressure shall be controlled with a pressure relief valve on the motor case drain line, maintaining a pressure of 1 bar ... 1.5 bar, (one of the D ports). Before the motor is put into free-wheeling the pilot control valve (5) is activated, which switches the main spool (2) and connects the motor ports AM and Cm to T. T has to be connected to tank. The valve is fitted with two triple pilot to open the check valves (7) and (8) with opening pressure of 2 bar, one in each motor line. The pilot to open the check valves are normally operated from opposite motor line pressure. The pilot to open the check valves can be remote controlled via pilot connection Px and Cx. The check valves allows free flow from the valve the port P and C to the load port Am respectively Cm. At a pilot pressure above 1:3 of the pressure at load port the check valves remains open. At a possible jammed drill string the pilot pressure on valve port P or C will decrease below 2 bar and close the current check valve and prevent the drill string from winding up. The CETOP 03 connection P-T-B-A at the blind plate (12) can be used for venting of the loaded ports Am and Cm. Hydraulic circuit for valve 1) Thread M6 Type code ln order to identify Hägglunds equipment exactly, the following ordering code is used. T