A small, compact line rupture valve protects against the effects of a tube or hose failure causing a sudden decrease in operating pressure in safety critical hydraulic circuits on access equipment.
Parker Hannifin, the world's largest manufacturer of motion and control technologies, has launched an innovative new Line Rupture Valve designed to protect against the effects of a tube or hose failure causing a sudden decrease in operating pressure. The new valve is small and compact, simple to install and ideal for use in safety critical hydraulic circuits on loading and lifting platforms and tables, fork lift trucks, self-propelled booms and other access equipment. The new Line Rupture Valve can be screwed directly into the hydraulic component in the system, such as a cylinder, pump or accumulator with no adapter necessary, and the other end makes the joint with a hose or tube assembly via a 24 degree Ermeto style connection.

In operation, the valve functions in a similar manner to a conventional non-return valve, normally being held in an open position by an internal spring.

If the hydraulic pressure suddenly falls, for example if a pressure line or tube ruptures, causing a large change in flow rate, then the valve will immediately close, shutting off the flow of hydraulic fluid and ensuring that the load is held safely in place; depending on the volumetric flow rate the valve can be closed with virtually no leakage.

The new line rupture valve can be pre-set to the required level by means of a simple adjustment set-screw and is sufficiently compact to enable it to be used in confined spaces.

In addition, a special version is available with a restricted bore to allow loads to be lowered in a controlled manner if a sudden pressure drop occurs.

The valve body is constructed from carbon steel, with a Chromium 6 free zinc electroplate corrosion protection, while the internal valve spring and disk are manufactured from stainless steel.

The new Line Rupture Valve can be used with all conventional hydraulic media at temperatures between -50 deg C and 120 deg C.