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The ATR Series Hydraulic Check Valve is a precision-engineered non-return valve designed to ensure one-way fluid flow in hydraulic circuits. The internal valve mechanism automatically opens when forward pressure reaches the specified cracking pressure and closes immediately when reverse flow occurs, providing reliable protection for hydraulic equipment.
Manufactured with precision-machined components, the valve delivers stable sealing performance, low pressure loss, and dependable operation under demanding working conditions. Its inline structure allows easy installation while minimizing space requirements in hydraulic piping systems.
Constructed from high-quality carbon steel and available with corrosion-resistant surface treatment, the ATR series provides excellent mechanical strength and durability. Multiple BSP thread sizes are available to suit a wide variety of hydraulic applications, while customized specifications can also be supplied according to customer requirements.
The ATR Series Hydraulic Check Valve is suitable for various hydraulic circuits requiring reliable backflow prevention and stable system performance.
Designed for one-way hydraulic flow control
Prevents reverse flow effectively
BSP threaded inline connection
Precision-machined valve components
Low pressure loss
High-strength carbon steel construction
Excellent sealing performance
Corrosion-resistant surface treatment
OEM and customized specifications available
| Product Model | DN | PN (Bar) | L | D | S | M | H |
| ATR-G1/4 | 6 | 400 | 62 | 18.5 | 19 | G1/4 | 12 |
| ATR-G3/8 | 10 | 400 | 70 | 23.5 | 24 | G3/8 | 14 |
| ATR-G1/2 | 12 | 350 | 77 | 29.5 | 30 | G1/2 | 16 |
| ATR-G3/4 | 16 | 350 | 90 | 35.5 | 36 | G3/4 | 18 |
| ATR-G1 | 20 | 350 | 106 | 45.5 | 46 | G1 | 20 |
| ATR-G1/4 | 25 | 250 | 130 | 54.5 | 55 | G1/4 | 22 |
| ATR-G1'/2 | 30 | 250 | 140 | 64.5 | 65 | G1'/2 | 24 |
| ATR-G2 | 40 | 250 | 160 | 74.5 | 75 | G2 | 26 |
| Opening Pressure：0.5–5 Bar | |||||||
The ATR Series Hydraulic Check Valve is widely used in hydraulic power units, construction machinery, agricultural equipment, industrial automation systems, mining equipment, marine hydraulic systems, machine tools, hydraulic cylinders, pumps, valves, and other hydraulic circuits requiring reliable one-way flow control and reverse flow protection.
