Oleodinamica Marchesini V0771 VUBA 1/4 + MFF hose burst valve assembly

Oleodinamica Marchesini V0771 is the VUBA 1/4 hose burst valve with a female/female MFF inline body and 1/4" BSP connections. The original assembly table identifies this complete article and lists a mass of 0.072 kg and dimension L1 of 50 mm. The photograph is taken from the exact named-brand supplier offer and represents the complete housing.

The assembly uses the V0770 cartridge, whose factory rating is 30 l/min maximum flow and 350 bar maximum pressure. These are recorded as cartridge reference values; a separately stated maximum pressure rating for the complete housing is not provided by this sheet.

Install V towards supply and C towards the actuator. When outflow exceeds the adjusted reaction flow, the sealing plate closes to limit uncontrolled descent following hose failure. The manufacturer states that this device is neither a load-holding check valve nor a one-way flow restrictor, and recommends a downstream flow-control valve.

The plate gap S controls the reaction flow. The manufacturer recommends setting reaction flow to approximately 1.5 times normal system flow; this is an installation setting, not a confirmed delivered preset. A separately ordered bleed-hole version needs a specified hole diameter and is not implied by this standard code. Retain the original required cavity clearance shown in the local PDF.

The local PDF retains the complete applicable original manufacturer spread, including the article table, hydraulic symbol, drawings and ordering notes. Where curves specify oil at 50 °C and 30 cSt, these are curve reference conditions rather than an operating-temperature limit.