GB/T 588 Marine Bronze Stop Check Valve | Seawater Flow Control
A screw-down non-return valve made of corrosion-resistant bronze. Perfect for seawater systems needing both isolation and backflow protection. Handles medium pressure up to 2.5MPa.
Accreditation and Certificates:
The GB/T 588 combines versatility with durability. The bronze body resists the harsh marine environment. The valve allows operators to close the line manually for maintenance. During normal operation, the stem is raised, allowing the valve to act as a check valve. This prevents pump reversal. It is essential for bilge, ballast, and fire systems where space and weight are critical.
Product Drawings：
Technical Specifications：
| Model | Nominal Pressure (PN) MPa | Nominal Diameter (DN) mm |
| A, B | 1 | 65–150 |
| 1.6 | 125-150 | |
| 2.5 | 20–120 | |
| AS, BS | 0.6 | 15–150 |
| 1.6 | 65–150 | |
| 2.5 | 15–125 |
Key Features：
- Bronze Body: Will not rust in seawater.
- SDNR Function: Shutoff and check in one body.
- Wide Pressure Range: 0.6 to 2.5 MPa.
- Safe Operation: Manual closing overrides flow.
Applications：
- Bilge Manifolds: Directs suction and stops backflow.
- Fire Mains: Isolates sections and protects pumps.
- Cooling Loops: Manages seawater circulation.
Installation & Maintenance：
Installation: Ensure flange faces are clean. Tighten bolts in a star pattern.
Maintenance: Inspect internal disc surface during overhauls. Keep stem greased.
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: What is the difference between GB/T 588 and 589?
A1: GB/T 589 is a simple check valve. GB/T 588 is a stop-check valve that can be manually closed.
Contact Us Now
If you would like to have a question then get in touch today, we are ready to assist 24/7.
We welcome your cooperation and we will develop with you.
- Factory-direct Connectivity Solutions.
- High quality, Competitive Price.
- Custom-tailored solutions.
- Problem-solving approach.