Oleodinamica Marchesini VC0350/300 VMPC 35 50-300 BAR cartridge pressure relief valve

Oleodinamica Marchesini VC0350/300 is the VMPC 35 50-300 BAR screw-in pressure-relief cartridge. The exact factory row lists maximum flow of 35 l/min, pressure-setting range of 50–300 bar, an M20 × 1.5 mounting thread and mass of 0.155 kg.

The cartridge connects the pressure passage P to tank passage T when circuit pressure reaches the adjusted relief setting. Fit it into the machined cavity shown on the original drawing and align the pressure and tank passages. It is a bare cartridge, so no separate inline housing is inferred.

The drawing gives overall length 104 mm, installation hexagon size 22 mm and adjustment hexagon size 13 mm. The cavity includes the specified 21 H7 guide bore and M20 × 1.5 internal thread. Guide-bore dimensions and machining depths are not pipe-connection sizes.

The 50–300 bar range describes adjustment capability, not a confirmed delivered preset or an independently stated maximum pressure rating for the cartridge body. The body is zinc-plated steel with hardened and ground internals, standard BUNA-N seals and guided-poppet sealing with negligible leakage. Handknob and sealing-cap variants are separate options and are not inferred for this actual screw-adjusted article.

The local technical PDF retains the complete relevant original manufacturer spread, including the exact spring-code matrix, cartridge row or stainless-code example. Neighbouring executions apply only to their identified rows. Any 50 °C oil temperature and 30 cSt viscosity beside curves are reference conditions rather than operating limits.