HV3R4SC1UHV4H20

The HV3R4SC1UHV4H20 assembly belongs to the Vickers Hydraulic Accessories series and is manufactured by Vickers. It prepares hydraulic automation circuits by housing a replaceable element that traps particulate contaminants. The unit measures 447 mm (17.6 in) in overall length so it fits medium-size return lines without extension brackets. A dry mass of 3.4 kg (7.5 lb) allows single-person handling during maintenance. The rated flow capacity of 280 L/min (74 USgpm) matches pumps used on presses and mobile machinery, while a continuous operating pressure of 50 bar (725 psi) prevents case distortion under normal return line service. Its aluminum head limits weight yet withstands tightening forces at the 1.625-12 UN SAE-20 port thread that connects to standard manifold ports. The bowl and collar are made of carbon steel to sustain repeated installation torque and protect the filter element. Viton-A seals resist hydraulic oils across a temperature span from −30 °C to 121 °C (−22 °F to 250 °F) so seasonal changes do not compromise leakage integrity.

Filtration efficiency is defined by a βx(c) ratio of 1000, indicating that the element removes 99.9 % of particles at the stated micron rating to reach a system cleanliness of 22/19/16. The element can tolerate a collapse pressure of 207 bar (3000 psi), ensuring structural integrity if flow is blocked downstream. No bypass valve is fitted, so all return flow passes through the media and cleanliness is not sacrificed during cold starts. A differential pressure indicator set at 4.9 bar (70 psi) alerts service staff when replacement is due, and the signal is routed through a Hirschmann electrical connector for simple wiring to a panel light or PLC. Routine servicing is scheduled only when the indicator trips, which helps avoid unnecessary element changes and maintains stable differential pressure across the housing. These characteristics align with Vickers design practice for hydraulic accessories that must guard critical valves and actuators in automated machines.