ZDB6VP3-4X/200V

The ZDB6VP3-4X/200V pressure relief valve belongs to the ZDB Pressure Relief Valves series and is manufactured by Bosch Rexroth for hydraulic automation circuits that need compact sandwich plate installation. Classified as a size 6 sandwich plate valve, it is built to slide between a subplate and a directional valve without altering manifold height. A porting pattern that follows ISO 4401-03-02-0-05 provides direct bolt-on mounting to standard CETOP 03 interfaces. The valve employs a P–T relief function so excess pressure in the P line is routed to tank. System pressure is adjustable up to 200 bar by means of a lockable rotary knob with a scale that allows repeatable settings while deterring tampering. One integrated valve cartridge handles the relief task and simplifies service.

The housing is rated for a maximum operating pressure of 315 bar, giving a safety margin above the 200 bar set point. Flow capacity reaches 60 l/min, letting the element protect medium-sized actuators without excessive pressure rise. A counter pressure of up to 40 bar can be present at the tank port without affecting stability. FKM seals tolerate higher temperatures and a broad range of hydraulic fluids, extending service life. The assembly can be mounted in any position, which eases placement inside stacked valve banks or compact power units. Fluid cleanliness must meet ISO 4406 (c) 20/18/15 to prevent wear on precision edges and preserve consistent cracking behavior. These characteristics support reliable pressure limitation in mobile and industrial hydraulic equipment.