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Pressure Seal Marine Gate Valve, Duplex Stainless Steel for High-Pressure Systems
Product Spotlights
Pressure seal bonnet design ensures superior leak prevention under extreme high pressure. Constructed from corrosion-resistant Duplex Stainless Steel for unmatched durability in marine and harsh environments. Complies with API/ASME standards for global project compatibility. Offers versatile operation (manual/geared/actuated) and is available in a wide range of sizes and pressure classes. Designed for minimal maintenance and long service life, reducing total cost of ownership.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Material:
Other, Duplex Stainless Steel (UNS S32205/S31803)
Application:
Other, Marine
Pressure Rating:
Class 150 - 2500, up to 10,000 PSI
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Material
Other, Duplex Stainless Steel (UNS S32205/S31803)
Application
Other, Marine
Pressure Rating
Class 150 - 2500, up to 10,000 PSI
Connection Type
Flanged, Threaded, Socket Weld
Operation Type
Manual (Handwheel), Gear Operated, Actuated
Seat Type
Pressure Seal, Metal-to-Metal
Temperature Range
-20°C to 200°C (-4°F to 392°F)
Size Range
1/2 inch to 24 inch (DN15 to DN600)
Design Standard
API 600, API 6D, ASME B16.34
Face-to-Face
ASME B16.10
As a leading manufacturer of industrial valves since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to introduce our premium Pressure Seal Marine Gate Valve. Engineered specifically for the demanding environments of marine and high-pressure systems, this valve represents the pinnacle of reliability and performance. Crafted from superior Duplex Stainless Steel, it is designed to withstand extreme pressures, corrosive seawater, and challenging operational conditions, ensuring uninterrupted flow control and system integrity for your most critical applications. Our commitment to ISO9001-certified quality processes guarantees that every valve meets the highest standards of manufacturing excellence.
The core of this valve's design is the pressure seal bonnet mechanism. Unlike conventional bolted bonnets, this innovative design utilizes system pressure to create an increasingly tighter seal as internal pressure rises. This makes it the ideal choice for high-pressure and high-temperature services where safety and leak prevention are paramount. Combined with the exceptional strength and corrosion resistance of Duplex Stainless Steel, this valve delivers unparalleled service life and operational security.
Key Features & Technical Advantages:
- Superior Material: Constructed from UNS S32205/S31803 Duplex Stainless Steel, offering a unique combination of high strength (approximately double that of standard austenitic stainless steels) and excellent resistance to chloride stress corrosion cracking, pitting, and crevice corrosion.
- Pressure Seal Bonnet: The bonnet seal is self-energizing; internal pressure acts upon a floating gland follower, compressing the bonnet gasket and creating a tighter seal. This eliminates the need for large, heavy bolting used in standard designs, resulting in a more compact and lighter-weight valve for its pressure class.
- Robust Stem & Gate Design: Features a rising stem with a non-rotating design to minimize wear. The solid wedge or flexible wedge gate is precision-machined to ensure bubble-tight shut-off and smooth operation even after prolonged periods in the closed or open position.
- Versatile Operation: Available with manual handwheel operation, bevel gear operators for high-torque applications, or can be fitted with pneumatic/hydraulic/electric actuators for remote and automated control systems.
- Full Port Bore: Provides minimal pressure drop across the valve, reducing energy consumption and allowing for the passage of pipeline pigs in relevant applications.
- Fire-Safe Design Optional: Can be supplied with fire-tested API 607/API 6FA compliant seats and seals to maintain isolation in the event of a fire.
Technical Specifications Table:
| Parameter | Specification |
|---|---|
| Primary Material (Body & Bonnet) | Duplex Stainless Steel (UNS S32205/S31803) |
| Pressure Classes | Class 150, 300, 600, 900, 1500, 2500 (ASME) |
| Temperature Range | -20°C to 200°C (-4°F to 392°F) Standard |
| End Connections | RF Flanged, RTJ Flanged, BW, SW, Threaded (NPT/BSP) |
| Seat & Seal Material | Stellite/Hard-faced or Duplex SS; Graphite Packing |
| Stem Material | Duplex Stainless Steel or 17-4PH Stainless Steel |
| Design & Test Standards | API 600, API 6D, ASME B16.34; tested per API 598 |
Benefits for Your Operations:
- Enhanced Safety & Reliability: The pressure seal design significantly reduces the risk of bonnet joint leakage under high pressure, protecting personnel and assets.
- Reduced Maintenance & Lifecycle Cost: Duplex steel's corrosion resistance minimizes degradation and the need for frequent replacements. The robust design ensures long service intervals.
- Optimal for Marine & Offshore Use: Excellent resistance to seawater, brackish water, and chloride-rich environments prevents premature failure common in other materials.
- High-Pressure Performance: Specifically engineered to perform reliably in systems with pressures exceeding 2000 PSI, common in hydraulic systems, boiler feed lines, and main steam isolations.
- Global Compliance: Manufactured according to international API and ASME standards, facilitating their use in projects worldwide.
With an annual export value between US$1 Million and US$1.5 Million and a strong presence across North America, South America, Europe, Asia, Africa, and Oceania, Shanghai Zhibang has built a global reputation for delivering dependable valve solutions. Our valves ship from major ports including Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring efficient logistics to your location. Choosing our Pressure Seal Marine Gate Valve means investing in a component engineered for durability, safety, and peak performance in your high-pressure marine systems. Contact us today to discuss your specific requirements, request a detailed quotation, or learn more about our comprehensive range of industrial valves.
Frequently Asked Questions (FAQ):
-
Q: What is the main advantage of a pressure seal bonnet over a bolted bonnet in a gate valve?
A: The pressure seal bonnet uses system pressure to enhance the sealing force on the gasket, creating a tighter seal as pressure increases. This design is inherently safer for high-pressure applications (typically above Class 900) as it eliminates the risk of bolt fatigue or relaxation, leading to potential leakage points common in traditional bolted bonnets. -
Q: Why is Duplex Stainless Steel particularly suitable for marine gate valves?
A: Duplex stainless steel offers a superior combination of high mechanical strength and exceptional resistance to chloride-induced stress corrosion cracking (SCC), pitting, and crevice corrosion. These forms of corrosion are prevalent in seawater and offshore environments, making duplex steel a preferred material for longevity and reliability in marine applications. -
Q: Can this valve be used with actuators for automated control?
A: Yes. Our Pressure Seal Gate Valves are designed to be compatible with various pneumatic, hydraulic, and electric actuators. The yoke and stem design accommodates the mounting of standard actuator interfaces, allowing for seamless integration into automated or remotely controlled piping systems. -
Q: What is the typical delivery lead time for these valves?
A: Lead times vary based on size, pressure class, and order quantity. Standard configurations typically have shorter lead times. We recommend contacting our sales team with your specific specifications for an accurate production and delivery schedule, leveraging our efficient shipping from multiple Chinese ports. -
Q: Are these valves fire-safe rated?
A: Fire-safe design is an available option. We can supply valves with secondary metal-sealing surfaces (fire-safe seats) and graphite packing that meet recognized fire-test standards such as API 607/API 6FA. Please specify this requirement when inquiring. -
Q: What maintenance is required for these pressure seal gate valves?
A: Maintenance requirements are minimal due to the robust construction. Periodic operational checks and visual inspections are recommended. The stem packing may occasionally require adjustment or replacement, which is a straightforward procedure. The pressure seal gasket is designed for long life but can be replaced during major overhaul if necessary. -
Q: Do you offer customization for non-standard sizes or specifications?
A: As a manufacturer, we have the capability to engineer and produce valves to meet custom requirements, including special dimensions, materials, pressure ratings, or end connections. Please provide your detailed specifications for evaluation and quotation. -
Q: What documentation and certifications accompany the valves?
A: Each valve is supplied with essential documentation, which typically includes a Material Test Report (MTR), Certificate of Conformity, and detailed dimensional drawings. Our manufacturing facility is ISO9001 certified, ensuring a consistent quality management system governs production.
Send Inquiry to This Supplier
1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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