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As a professional manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our high-performance Marine Parallel Slide Gate Valve. Engineered for demanding marine and offshore applications, this valve is built to withstand harsh environments, including seawater, high pressure, and corrosive media. Our commitment to quality is backed by an extended warranty on the body and seats, providing our clients with long-term reliability and peace of mind. With over US$1 million in annual exports and a strong presence in global markets from North America to Southeast Asia, we deliver robust solutions trusted by shipbuilders and offshore operators worldwide.
The Marine Parallel Slide Gate Valve is designed for isolation and shut-off services in piping systems. Its parallel slide design ensures a tight seal even under high differential pressure, making it ideal for critical applications where leakage cannot be tolerated. The valve features a robust construction with materials selected for corrosion resistance and durability in marine environments.
- Superior Sealing Performance: The parallel gate design provides a bi-directional seal, preventing leakage from both upstream and downstream directions. The metal-to-metal or resilient seats ensure long service life even with abrasive media.
- Extended Warranty Protection: We offer an industry-leading extended warranty specifically covering the valve body and seating surfaces, reflecting our confidence in the product's durability and manufacturing quality.
- Corrosion-Resistant Materials: Available in various grades including cast steel, stainless steel (CF8, CF8M), and duplex steel, providing excellent resistance to seawater corrosion and erosion.
- Low Operating Torque: The parallel slide mechanism reduces friction during operation, resulting in lower required operating torque compared to wedge gate valves, which extends the life of actuators and operators.
- Minimal Maintenance Requirements: Designed with fewer wearing parts and simplified maintenance procedures, reducing downtime and operational costs over the valve's lifecycle.
- Versatile Operation Options: Can be supplied with handwheel, gear operator, or electric/pneumatic actuators to meet different automation requirements and space constraints.
The technical specifications of our Marine Parallel Slide Gate Valve are detailed in the table below:
| Parameter | Specification |
| Size Range | DN50 to DN600 (2" to 24") |
| Pressure Class | Class 150, 300, 600, 900, 1500 |
| Temperature Range | -29°C to 425°C (-20°F to 800°F) |
| Body Materials | WCB, WCC, LCB, CF8, CF8M, Duplex |
| Trim Materials | 13Cr, 316SS, Stellite, Alloy 20 |
| End Connections | RF, RTJ, BW per ASME B16.5/B16.47 |
| Design Standards | API 600, API 6D, BS 1414, ISO 10434 |
| Test Standards | API 598, ISO 5208 |
| Operation | Handwheel, Gear, Electric/Pneumatic Actuator |
This valve offers significant advantages for marine operators and shipbuilders. The parallel slide design prevents gate jamming that can occur in wedge gate valves due to thermal expansion or pipeline stress. The extended warranty on body and seats provides financial protection against unexpected repair costs, while the corrosion-resistant materials ensure long-term performance in seawater applications. For offshore platforms and vessels, the valve's reliability translates to reduced maintenance intervals, lower total cost of ownership, and enhanced safety through dependable shut-off capability.
Our manufacturing expertise, backed by ISO9001 certification, ensures consistent quality across all production batches. With shipment capabilities from major ports including Shanghai, Guangzhou, Hong Kong, and Beijing, we efficiently serve global markets across North America, South America, Europe, Asia, Africa, and Oceania. The extended warranty demonstrates our commitment beyond the initial sale, providing assurance that your investment is protected. Contact us today to discuss your specific requirements for marine valve applications and discover how our parallel slide gate valves can enhance the reliability and safety of your piping systems.
Frequently Asked Questions
Q1: What makes a parallel slide gate valve different from a wedge gate valve?
A: Parallel slide gate valves feature two parallel gates that move apart against seat rings when opening and come together when closing. This design provides better sealing under high differential pressure and reduces the risk of gate jamming compared to wedge gate valves, which have a single tapered gate.
Q2: What is covered under the extended warranty for body and seats?
A: The extended warranty covers defects in materials and workmanship for the valve body and seating surfaces for an extended period beyond standard warranty terms. Specific warranty duration and conditions are provided with each quotation and can be customized based on application requirements.
Q3: Can these valves handle seawater applications?
A: Yes, these valves are specifically designed for marine environments. We offer material options including stainless steel (316/316L) and duplex stainless steel that provide excellent corrosion resistance against seawater, making them suitable for seawater cooling systems, ballast systems, and other marine applications.
Q4: What actuation options are available?
A: The valves can be supplied with manual operation (handwheel or gear operator) or automated with electric, pneumatic, or hydraulic actuators. We can provide complete actuated packages with mounting brackets, limit switches, and positioners as required.
Q5: Are these valves suitable for high-pressure applications?
A: Absolutely. Our parallel slide gate valves are available in pressure classes up to Class 1500 (2500 psi), making them suitable for high-pressure services in offshore platforms, FPSOs, and other marine installations where pressure containment is critical.
Q6: What testing is performed before shipment?
A: Each valve undergoes comprehensive testing including hydrostatic shell test, seat leakage test, and operational tests per API 598 or ISO 5208 standards. Additional tests such as NDT (PT, MT, RT) can be performed upon request for critical applications.
Q7: Can you provide valves with special coatings for corrosion protection?
A: Yes, we offer various coating options including epoxy coatings, rubber lining, and specialized marine-grade coatings to enhance corrosion protection in aggressive environments. These can be specified based on your service conditions and media.
Q8: What is your typical delivery time for these valves?
A: Standard configurations are typically available within 4-8 weeks, depending on size, material, and quantity. Expedited delivery may be available for urgent requirements. We maintain strategic inventory of common sizes and materials to reduce lead times.
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