Rexroth Z2FS6‑2‑40B/2Q Sandwich Stack Valve
Product Overview
The Rexroth Z2FS6‑2‑40B/2Q is a precision twin throttle‑check Hydraulic valve in sandwich stack design, serving as a core main‑flow speed control component for industrial and mobile hydraulic system. The “2Q” version is specially used for main flow limitation of two actuator ports, independently adjusting the inflow and outflow flow of hydraulic cylinders and motors, accurately stabilizing motion speed and eliminating hydraulic impact and unstable operation of the Machine. Adopting NG6 (CETOP 03) standard ISO 4401 mounting dimension, it is installed between directional valve and manifold block, simplifying pipeline layout, reducing leakage points and optimizing compact hydraulic station arrangement. With lockable adjustable throttling screws and precision‑matched internal spool, it supports meter‑in supply throttling, greatly improving motion smoothness and operation safety of the whole hydraulic system. It is widely applied for OEM assembly, routine maintenance and spare‑parts replacement of small construction machinery, injection molding machines, automation equipment, machine tools and hydraulic presses .
Technical Specifications
‑ Model: Z2FS6‑2‑40B/2Q
‑ Brand: Rexroth
‑ Product Type: Double throttle check Hydraulic valve, sandwich stack main flow control valve
‑ Nominal size: NG6 / Cetop 03, compliant with ISO 4401 standard
‑ Maximum working pressure: 315 bar
‑ Rated maximum flow: 80 L/min
‑ Version: 2Q (main flow limitation for actuator speed adjustment)
‑ Throttling mode: Supply throttling (inlet throttling)
‑ Mounting mode: Sandwich stacked installation, matched with standard directional valve manifold
‑ Working medium: Anti‑wear hydraulic oil for mobile and industrial hydraulic system
‑ Operating temperature: -30℃ ~ +80℃ (NBR seals); -20℃ ~ +80℃ (FKM seals)
‑ Feature: Independent dual‑path flow adjustment, reversible free return flow, low pressure loss, compact structure, strong interchangeability, suitable for long‑term frequent speed regulation of small hydraulic Machine.
Working Principle
Pressure oil from the hydraulic system enters the two working ports of the Hydraulic valve. In the forward supply direction, the adjustable throttle orifice limits oil flow to precisely control the movement speed of executive components; in the reverse return direction, the built‑in check valve opens fully, allowing oil to flow back freely without throttling loss. The lockable adjusting screw sets the opening of the throttle port to match the speed requirement of the Machine. As a 2Q main flow version, it directly regulates the working flow of the actuator to realize stable speed control. Wear of the throttle spool, valve seat or sealing rings will cause flow deviation, unstable speed and hydraulic impact of the equipment. Replacing a genuine Z2FS6‑2‑40B/2Q can restore accurate flow regulation function and keep the hydraulic system running smoothly .
Core Advantages
1. Authentic Rexroth hydraulic manufacturing quality, stable pressure resistance and flow control accuracy, effectively optimizing the motion stability of the hydraulic system.
2. Miniature sandwich integrated design saves installation space, reduces external oil pipes and leakage risks, and optimizes the overall layout of the Machine.
3. Dual independent throttle channels realize separate speed control for two actuator oil circuits, flexible to meet diverse working condition demands of small hydraulic equipment.
4. Optimized internal flow channel minimizes pressure drop, reduces energy consumption and oil temperature rise, and prolongs the service life of the Hydraulic valve.
5. Standard NG6 universal interface, fully compatible with mainstream small‑size hydraulic valve groups, direct replacement without modifying original manifold plates, convenient for on‑site maintenance and system transformation.
Application Range
Z2FS6‑2‑40B/2Q double throttle check Hydraulic valve is an essential flow control element for hydraulic circuits. It is widely applied to small construction machinery, injection molding machines, bending machines, machine tool hydraulic fixtures, aerial work platforms, automated production lines and other hydraulic‑driven Machine. Suitable for equipment manufacturers, hydraulic system maintenance workshops and global spare‑parts suppliers for routine maintenance, system upgrading and component replacement.
