Guangdong Yanhui Hydraulic Co., Ltd. is one of the leading manufacturers and suppliers of atos hr-012 hydraulic check valve in China. We warmly welcome you to wholesale bulk atos hr-012 hydraulic check valve for sale here from our factory. If you have any enquiry about pricelist and quotation, please feel free to email us.
Product Overview
▔▔The Atos HR-012 is a high-performance, direct-operated modular check valve designed for standard hydraulic circuit mounting conforming to ISO 4401 / CETOP 03 (Size 06) standards. Engineered for maximum reliability, low pressure drop, and leak-free operation, the HR-012 allows free fluid flow in one direction while strictly preventing reverse flow.
Key Advantages
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Leak-Free Sealing: Features precision-ground poppet designs and high-grade sealing elements to ensure zero internal leakage in the closed direction.
Modular Stackable Design: Standard CETOP 03 / ISO 4401-03 interface enables easy sandwich mounting beneath directional valves, minimizing piping and compacting manifold design.
High Working Pressure & Flow: Capable of handling operating pressures up to 315 bar (4560 psi) and max flow rates up to 60 L/min (15.8 gpm).
Robust & Corrosion-Resistant Build: Manufactured with high-strength alloy body and treated steel internal components for long service life under heavy duty applications.
Flexible Cracking Pressures: Available with multiple spring cracking pressure options (e.g., 0.5 bar, 2 bar, 4 bar) to suit varied system load requirements.
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Technical Specifications
▔▔| Parameter | Specification / Value |
| Model Code | HR-012 (or HR-012/* options) |
| Manufacturer | Atos Hydraulic |
| Valve Type | Modular Non-Return / Check Valve |
| Mounting Interface | ISO 4401-03 / CETOP 03 / NFPA D03 (Size 06) |
| Max Operating Pressure | 315 bar (4560 psi) |
| Max Flow Rate | 60 L/min (15.8 gpm) |
| Standard Cracking Pressure | 0.5 bar (7.25 psi) [Optional: 2 bar, 4 bar, 8 bar] |
| Fluid Temperature Range | -20°C to +80°C (-4°F to +176°F) |
| Ambient Temperature Range | -20°C to +70°C (-4°F to +158°F) |
| Recommended Viscosity Range | 15 to 100 mm²/s (cSt) |
| Fluid Cleanliness Standard | ISO 4406 class 20/18/15 (NAS 1638 class 9) |
| Seal Options | NBR (Standard), FKM/Viton (High temp/phosphate ester) |
| Weight | Approx. 1.2 kg (2.64 lbs) |
Applications
▔▔| Application Sector | Typical Machine / Equipment | Functional Role |
| Industrial Hydraulics | Plastic Injection Molding Machines & Metal Stamping Presses | Prevents reverse flow, maintains line pressure, and protects upstream pumps from pressure spikes. |
| Material Handling | Hydraulic Lifts, Elevators, & Winch Controls | Works as a safety non-return element to retain hydraulic pressure and prevent unintended load drops. |
| Machine Tools | CNC Milling, Lathes, & Hydraulic Clamping Systems | Maintains constant clamping pressure and ensures system directional stability during machining cycles. |
| Mobile Machinery | Excavators, Loaders, & Agricultural Equipment | Provides inline anti-cavitation protection and prevents reverse backflow under heavy dynamic movement. |
| Power Generation | Turbine Governors & Hydraulic Power Units (HPUs) | Ensures continuous unidirectional oil movement through critical filtration and cooling loops. |
Related Models
▔▔| Model Code | Mounting Size | Controlled Line(s) | Function / Feature |
| HR-011 | CETOP 03 (Size 06) | Line A | Single direct check valve on line A |
| HR-012 | CETOP 03 (Size 06) | Line A & B / Line P | Modular check valve (Standard line configuration) |
| HR-013 | CETOP 03 (Size 06) | Line B | Single direct check valve on line B |
| HR-014 | CETOP 03 (Size 06) | Line T | Check valve integrated into Return Line T |
| KR-012 | CETOP 05 (Size 10) | Lines A & B | Heavy-duty modular check valve for higher flow (up to 120 L/min) |
| JPR-012 | CETOP 07 (Size 16) | Lines A & B | High-flow modular check valve (up to 300 L/min) |
| HRA-012 | CETOP 03 (Size 06) | Lines A & B | Pilot-operated check valve for load holding |
FAQ
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Q1: What is the primary function of the Atos HR-012 check valve?
A: The main function of the Atos HR-012 is to allow fluid flow in one specified direction with low hydraulic resistance while completely blocking flow in the opposite direction. It prevents reverse fluid flow, maintains system pressure, and protects sensitive equipment from shock pressure backflows.
Q2: How does the HR-012 differ from a pilot-operated check valve like the HRA series?
A: The HR-012 is a direct-operated non-return valve that opens purely based on fluid pressure exceeding the spring cracking pressure. In contrast, pilot-operated check valves (such as the Atos HRA series) use an external or internal pilot pressure signal to force the valve open in the reverse direction when required.
Contact Us
▔▔Request a Quote Today to ensure your hydraulic system performs at its best with genuine components from Yanhui Hydraulic.
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