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Marine Slow Closing Check Valve, Counterweight Operated, PN10-PN40 Pressure Range
Product Spotlights
Engineered for marine safety, this counterweight-operated slow closing check valve prevents damaging water hammer and ensures reliable backflow prevention across a PN10-PN40 pressure range. Its adjustable, gradual closure protects pipeline systems, while robust construction in corrosion-resistant materials like stainless steel guarantees durability in seawater applications. Ideal for ballast, cooling, and fire systems on vessels and offshore platforms.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Application:
Other, Marine & Offshore Systems
Product Type:
Slow Closing Check Valve
Operation Method:
Counterweight Operated
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Application
Other, Marine & Offshore Systems
Product Type
Slow Closing Check Valve
Operation Method
Counterweight Operated
Pressure Rating (PN)
PN10, PN16, PN25, PN40
Connection Type
Flanged (RF, FF, RTJ), Threaded
Body Material
Cast Iron, Ductile Iron, Cast Steel, Stainless Steel
Trim Material
Bronze, Stainless Steel
Seat Material
EPDM, NBR, PTFE
Size Range
DN50 to DN600 (2“ to 24“)
Temperature Range
-20°C to 120°C
As a leading manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing high-performance fluid control solutions for demanding marine applications. Our Marine Slow Closing Check Valve, featuring a reliable counterweight-operated mechanism, is engineered to ensure safe and efficient system operation by preventing water hammer and reverse flow in critical pipelines. With a robust pressure range from PN10 to PN40, this valve is designed to meet the stringent requirements of shipbuilding, offshore platforms, and coastal infrastructure.
This valve offers distinct advantages for marine engineers and system designers:
- Controlled Closure: The slow-closing action, regulated by an adjustable counterweight, significantly reduces pressure surge and the risk of damaging water hammer, protecting pumps, pipes, and fittings.
- Reliable Backflow Prevention: Ensures unidirectional flow, automatically sealing tight to prevent media backflow when upstream pressure drops, crucial for maintaining system integrity.
- Durable Marine Construction: Available in corrosion-resistant materials like cast steel and stainless steel, with trim options suitable for seawater and various onboard fluids.
- Low Maintenance Design: The simple, robust counterweight mechanism requires minimal maintenance, even in harsh, salt-laden environments.
- Versatile Installation: Suitable for vertical or horizontal mounting in pipelines for ballast systems, cooling water, fire mains, bilge lines, and tank venting.
The technical specifications of our Marine Slow Closing Check Valve are detailed below:
| Parameter | Specification |
|---|---|
| Pressure Rating | PN10, PN16, PN25, PN40 |
| Size Range (DN) | 50, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600 |
| Connection Standards | EN 1092-1, ANSI B16.5, JIS B2210, AS 2129 |
| Body Material Options | Cast Iron (GG25), Ductile Iron (GGG40), Carbon Steel (WCB), Stainless Steel (CF8/CF8M) |
| Disc & Stem Material | Bronze, Stainless Steel (304/316) |
| Seat Seal Material | EPDM (Standard), NBR, PTFE (Optional) |
| Temperature Range | -20°C to 120°C (Depends on seat material) |
| Flow Direction | Horizontal or Vertical (Upward Flow) |
Our commitment to quality is backed by an ISO9001 certified manufacturing process, ensuring every valve meets rigorous performance standards. With an annual export value ranging between US$1 Million and US$1.5 Million, our products have gained trust in diverse global markets including North America, Southeast Asia, Europe, and the Middle East. We ship efficiently from major ports like Shanghai, Guangzhou, and Hong Kong. Choosing our Marine Slow Closing Check Valve means investing in a solution that enhances system safety, reduces maintenance costs, and provides long-term reliability for your marine applications. Contact us today to discuss your project requirements and receive a tailored quotation.
Frequently Asked Questions (FAQ)
-
What is the primary function of a slow closing check valve in marine systems?
Its main role is to prevent sudden valve closure, which causes damaging pressure surges (water hammer). The controlled, slow closing action protects pumps, pipes, and connected equipment from shock loads, ensuring system longevity and safety. -
How does the counterweight mechanism work?
The counterweight provides a controlled resistance against the disc's closing force. When flow stops or reverses, gravity and the counterweight allow the disc to close gradually at an adjustable speed, rather than slamming shut. -
Is this valve suitable for seawater applications?
Yes, when ordered with appropriate materials such as stainless steel (CF8M/316) body and trim, along with compatible seals like EPDM, it is specifically designed to handle corrosive media like seawater. -
Can the closing speed be adjusted on-site?
Yes, the closing speed is adjustable by modifying the counterweight position or mass. This allows for fine-tuning based on the specific system's pressure and flow characteristics after installation. -
What are the typical installation orientations?
It can be installed in horizontal pipelines or in vertical lines with upward flow. Installation orientation should be confirmed during selection to ensure proper operation of the counterweight mechanism. -
What pressure classes (PN) are available?
We offer this valve in PN10, PN16, PN25, and PN40 pressure ratings. The selection depends on your system's maximum working pressure requirements. - Are special coatings or surface treatments available for harsh environments?
Optional coatings like epoxy or galvanization can be applied to the exterior for enhanced corrosion protection in particularly aggressive offshore atmospheres. Details are available upon request. Do you provide documentation and certifications? Yes, we provide material test certificates, dimensional drawings, and operational manuals. Our manufacturing is ISO9001 certified, ensuring consistent quality.
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1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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