ATOS HQ-012 52 Throttle Check Valve

HQ-012 is ATOS’s modular throttle valve with a built‑in check valve presented in a sub‑plate (sandwich) format for hydraulic circuits. It is a non‑compensated model with a check valve to allow free reverse flow, and flow is adjusted by turning the setting screw—clockwise rotation increases throttling. The unit uses ISO 4401 mounting standards for a 06 size and a Cetop 3 interface, aligning with common cartridge‑type hydraulic blocks. Maximum system pressure is 350 bar, and the 06‑size configuration delivers up to 80 L/min of flow. This model sits within ATOS’s HQ/KQ/JPQ family of modular throttle valves and is available in sandwich/sub‑plate configurations designed for compact installation in hydraulic assemblies.