GB/T 586 Marine Cast Steel Check Valve | Steam & Oil Backflow Protection
A heavy-duty cast steel check valve. Designed for high-temperature steam and fuel oil systems. Prevents medium reversal efficiently. Flange connection ensures stability.
Accreditation and Certificates:
The GB/T 586 valve uses a strong cast steel body. It handles thermal stress well. The disc opens automatically with flow pressure. It closes by its own weight or back pressure. This prevents oil or steam from returning to the source. The carbon steel disc sits tightly against the seat. Leakage is minimal. It fits perfectly in engine rooms for fuel transfer lines. High temperatures up to 300°C are no problem for this unit.
Product Drawings：
Technical Specifications：
| Model | Nominal Pressure (PN) MPa | Nominal Diameter (DN) mm | Applicable Media |
| Type A, B | 1 | 65–125 |
Seawater, fresh water, fuel oil, lubricating oil, and steam with temperature not exceeding 300 °C |
| 2.5 | 20–100 | ||
| Type AS, BS | 1.6 | 100–125 | |
| 2.5 | 20–100 |
Key Features：
- Cast Steel Body: Resists heat and mechanical stress.
- Automatic Operation: Requires no manual control.
- Tight Sealing: Prevents pressure loss.
- High Temp Ready: Works up to 300°C.
Applications：
- Steam Lines: Prevents condensate backflow.
- Fuel Transfer: Protects pumps during oil movement.
- Freshwater Systems: Maintains line pressure.
Installation & Maintenance：
Installation: Install horizontally or vertically based on the model (Straight A type or Angle B type). Follow the flow arrow.
Maintenance: Check the sealing surface periodically. Clean debris from the valve body.
Custom Options Available：
We provide customization services based on international standards such as ANSI, JIS, and DIN, ensuring compatibility with different global market requirements.
FAQ ：
Q1: Can I use this for seawater?
A1: No. Cast steel corrodes in seawater. Use the bronze GB/T 589 model instead.
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