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Help CenterMarine Low Temperature Ball Valve With Mill Test Report and 2-Year Warranty
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As a leading manufacturer with ISO 9001 certified quality management, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing robust and reliable fluid control solutions for demanding industrial applications. Our Marine Low Temperature Ball Valve is engineered to deliver exceptional performance and safety in the harshest cryogenic environments, such as those found in LNG transportation, storage, and processing. With a commitment to quality backed by a full Mill Test Report and a comprehensive 2-Year Warranty, we offer peace of mind and long-term value to our global clientele across diverse sectors including marine, energy, and chemical industries.
This valve is designed to handle ultra-low temperature media, including liquefied natural gas (LNG), liquid nitrogen, liquid oxygen, and ethylene, with unwavering reliability. The core design focuses on preventing seat freezing and ensuring bubble-tight shut-off even after prolonged exposure to extreme cold, which is critical for operational safety and efficiency. The extended bonnet design is a key feature, distancing the stem packing from the cryogenic fluid to prevent packing freeze-up and ensure smooth operation. All critical components undergo specialized material selection and sub-zero temperature treatment to maintain ductility and prevent brittle fracture.
Key Technical Features & Specifications:
- Superior Low-Temperature Toughness: Body, ball, and stem are manufactured from materials like ASTM A352 LCB/LCB or 316/316L stainless steel, which are specifically chosen and treated for superior impact resistance at cryogenic temperatures.
- Extended Bonnet Design: Creates a thermal barrier, keeping stem seals at a higher, more manageable temperature to ensure reliable sealing and easy operation.
- Advanced Seat & Seal System: Utilizes specialized low-temperature polymers like reinforced PTFE or PEEK, or metal seats, to maintain elasticity and sealing integrity without hardening or cracking.
- Fire-Safe Option: Available with secondary metal sealing (fire-safe design per API 607/6FA) to provide an emergency seal in case of a fire where soft seals are compromised.
- Anti-Static & Blowout-Proof Stem: Integrated design ensures electrical continuity between ball and body to prevent static discharge, with a stem that is securely retained under pressure.
- Full Documentation: Each valve is supplied with a complete Mill Test Report (MTR) traceable to the heat/charge number, verifying chemical composition and mechanical properties.
Typical Technical Parameters Table:
| Parameter | Specification |
|---|---|
| Design Temperature | -196°C to +80°C (-320°F to +176°F) |
| Pressure Rating | Class 150, 300, 600, 900, 1500 (ASME) / PN16 to PN250 |
| Body Material | LCC, LCB, CF8, CF8M, WCB, WC6 |
| Ball & Stem Material | SS316, SS304, with Low-Temp Treatment |
| Seat Material | PTFE, RPTFE, PEEK, Metal (Inconel) |
| End Connection | RF Flange, RTJ Flange, SW, NPT, BW |
| Operation | Lever, Gear, Pneumatic/Hydraulic Actuator |
| Leakage Class | Class VI (Soft Seat), Class IV (Metal Seat) |
| Testing Standard | API 598, ISO 5208, Shell SPE 77/302 |
Benefits for Your Operations: Choosing our Marine Low Temperature Ball Valve translates directly into enhanced operational integrity and reduced lifecycle costs. The 2-Year Warranty underscores our confidence in the product's durability and provides significant protection against unforeseen failures. The provided Mill Test Report ensures full material traceability, a critical requirement for class society approvals (like ABS, DNV, LR) and for maintaining stringent quality records in regulated industries. Its robust construction minimizes maintenance frequency and the risk of unplanned downtime, which is especially costly in offshore and marine applications. Furthermore, the valve's efficient design contributes to lower fugitive emissions, supporting environmental compliance goals.
Shanghai Zhibang Valve leverages nearly a decade of manufacturing expertise and a global export footprint spanning North America, Europe, Southeast Asia, and beyond to deliver products that meet international standards. Our annual export volume reflects the trust placed in us by partners worldwide. For your next critical cryogenic application, from LNG bunkering systems to onshore storage terminals, partner with a manufacturer that combines rigorous quality control, comprehensive certification, and a strong warranty. Contact us today to discuss your specific requirements, request detailed technical data sheets, or to place a trial order.
Frequently Asked Questions (FAQ):
Q1: What is the main advantage of the "extended bonnet" design in this valve?
A1: The extended bonnet acts as a thermal barrier or "cold sink," distancing the stem packing and operating mechanism from the extremely cold process fluid. This prevents the packing from freezing solid, which ensures the valve remains operable and maintains a reliable stem seal, a common failure point in standard valves used for cryogenic service.
Q2: Can this valve be used for both liquid and gaseous cryogenic media?
A2: Yes, it is designed to handle both phases. However, specific design considerations like cavity pressure relief may be required for liquid service to prevent over-pressurization due to trapped fluid evaporation. It is important to specify the exact service conditions during inquiry.
Q3: What does the included Mill Test Report (MTR) contain, and why is it important?
A3: The MTR is a material certificate that provides traceability to the original mill. It includes the heat/charge number, chemical composition, mechanical properties (yield strength, tensile strength, impact values at low temperature), and heat treatment records. This document is essential for quality assurance, regulatory compliance, and for obtaining approvals from marine classification societies.
Q4: Is the 2-year warranty a global standard for such valves?
A4: A comprehensive 2-year warranty is a strong offering in the industrial valve market, indicating the manufacturer's confidence in their material quality, manufacturing process, and testing protocols. It goes beyond many standard warranties, providing extra security for the buyer.
Q5: Are these valves suitable for submerged or splash zone applications on vessels?
A5: The standard valves are designed for cryogenic fluid service. For external marine environments with saltwater exposure, specific external coatings, cathodic protection, or material upgrades (like higher grade stainless steel) may be required. These options are available upon request.
Q6: What types of actuators are compatible, and do you supply them?
A6: The valves can be fitted with manual lever/gear operators, as well as pneumatic (double-acting or spring-return) and hydraulic actuators. We can provide the valve as a manual unit or as a complete actuated package tailored to your control system requirements (e.g., 4-20mA positioners, limit switches).
Q7: How do I determine the correct pressure class (e.g., Class 150 vs. Class 300) for my application?
A7: The pressure class must be selected based on the maximum working pressure and temperature of your system, following the ASME B16.34 pressure-temperature rating tables. Our technical team can assist with this selection based on your provided process data.
Q8: Do you offer customization for special sizes or connections not listed?
A8: Yes, as a manufacturer, we have the capability to customize valves. This includes non-standard sizes, special end preparations, unique material combinations, or the integration of specific ancillary devices. Please inquire with your detailed specifications for a custom solution.
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