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Help CenterDN50-DN200 Flanged Cast Iron Globe Check Valve, Manual Operation, PN1.0-1.6MPa, Marine Approved by LR and ABS
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Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016 and ISO9001 certified, presents our premium line of DN50-DN200 Flanged Cast Iron Globe Check Valves with manual operation, rated PN1.0-1.6MPa. As a professional manufacturer with annual exports exceeding US$1 million, we serve global markets including North America, Europe, Southeast Asia, and the Middle East. These valves are specifically designed for marine applications and hold approvals from Lloyd's Register (LR) and the American Bureau of Shipping (ABS), ensuring unmatched reliability in demanding shipboard environments. Combining the functions of a globe valve and a check valve, this manual stop-check valve offers precise flow control and automatic backflow prevention in one robust unit, making it an essential component for ballast systems, cooling water lines, and fuel oil piping aboard vessels.
Key Features & Technical Specifications
- Dual Functionality: Operates as both a globe valve (for manual shut-off or throttling) and a check valve (to prevent reverse flow) – ideal for systems where both functions are required in a compact design.
- Durable Cast Iron Construction: High-quality grey cast iron (GG25) body and bonnet provide excellent corrosion resistance in seawater and freshwater marine environments.
- Flanged Connection: Standard EN 1092-2 PN10/16 flanges ensure easy installation and leak-proof sealing with compatible piping systems.
- Manual Handwheel Operation: A robust rising stem handwheel allows for smooth, precise adjustment of the disc position, enabling throttling capabilities.
- Marine Class Approvals: Fully type-approved by LR and ABS, meeting the strict requirements of ship classification societies for safety and performance.
- Pressure & Temperature Range: Designed for working pressures up to 1.6 MPa (232 psi) and temperatures from -10°C to +200°C.
| Parameter | Value |
|---|---|
| Nominal Diameter (DN) | 50, 65, 80, 100, 125, 150, 200 |
| Pressure Rating | PN1.0 / PN1.6 MPa (10 bar / 16 bar) |
| Body & Bonnet Material | Cast Iron GG25 (EN 1561) |
| Disc Material | Brass or Stainless Steel (optional) |
| Seat Ring Material | Bronze or Stainless Steel (upon request) |
| Stem Material | Stainless Steel 2Cr13 |
| Flange Standards | EN 1092-2 / DIN 2501 / BS 4504 (optional) |
| Test Pressure (Shell) | 2.4 MPa (24 bar) |
| Test Pressure (Seat) | 1.76 MPa (17.6 bar) |
| Working Temperature | -10°C to +200°C |
| Applicable Medium | Fresh water, seawater, oil, steam (non-corrosive) |
Operational Advantages for Marine Systems
- Space-Saving Design: Combines two valve functions in one body, reducing the number of flanged connections and installation footprint on ships.
- Reliable Backflow Prevention: The automatic check mechanism responds instantly to flow direction changes, protecting pumps and equipment from damage.
- Throttling Capabilities: Manual handwheel allows partial closure to regulate flow rate, unlike standard swing check valves.
- Easy Maintenance: Bolted bonnet design enables quick access to internal parts for inspection or repair without removing the valve from the pipeline.
- Corrosion Resistance: Cast iron with internal epoxy coating (available upon request) withstands aggressive marine environments.
Why Choose Shanghai Zhibang Valve?
As a dedicated manufacturer with ISO9001 quality management systems, we deliver consistent product quality and traceability. Our DN50-DN200 globe check valves are produced in our Shanghai facility using precision casting and machining processes. Every valve undergoes 100% pressure testing (shell and seat) according to EN 12266-1 before shipment. Having served clients across 20+ countries including major shipyards in Europe, Southeast Asia, and North America, we understand the strict requirements of marine classification societies. Our factory ships from Shanghai, Guangzhou, Hong Kong, or Beijing, ensuring timely delivery worldwide. With annual exports of US$1–1.5 million and a strong domestic market presence, we pride ourselves on competitive pricing and responsive after-sales support.
Trusted by Marine Industry Leaders
Our valves have been installed on bulk carriers, container ships, and offshore platforms, earning approvals from LR and ABS. These certifications guarantee that the design, materials, and manufacturing processes meet the highest international safety standards. Whether you need a standard PN16 model or a custom configuration with special trim materials, we can accommodate your requirements. Contact our team for a quote or technical consultation – we are ready to support your marine projects with reliable, cost-effective flow control solutions.
Frequently Asked Questions (FAQ)
-
What is the difference between a globe check valve and a standard check valve?
A globe check valve (also called a stop-check valve) combines a globe valve's shut-off/throttling function with a check valve's automatic backflow prevention. It allows manual closure independent of flow direction, while standard check valves only prevent reverse flow automatically. -
Are these valves suitable for seawater applications?
Yes, the cast iron body with appropriate internal coatings (e.g., epoxy) and brass/stainless steel trim is resistant to seawater corrosion. For harsh environments, we recommend specifying stainless steel disc and seat. -
Do you provide LR and ABS certification documents?
Absolutely. Each valve shipped with LR and ABS type approval certificates can be supplied upon request. We also offer third-party inspection by classification societies if needed. -
What is the lead time for DN100 PN16 valves?
Standard sizes like DN50-DN100 are typically stocked or have a 15–25 day lead time. Larger sizes DN125-DN200 may require 30–40 days depending on quantity. Please inquire for exact delivery schedules. -
Can the handwheel be replaced with a gearbox or actuator?
Yes, this valve can be customized with bevel gear operators or electric/pneumatic actuators for remote or automated control. Contact our sales team for actuator sizing. -
What flange standards do you follow?
By default, we manufacture to EN 1092-2 PN10/PN16 flanges. Other standards such as DIN 2501, BS 4504, or ASME B16.5 Class 150 are available as options. Please specify your requirement. -
What is the maximum working temperature?
The standard design is rated for -10°C to +200°C. For higher temperature applications (up to 350°C), we offer alternative materials like ductile iron or steel with appropriate seating materials. -
How do I ensure the valve is installed correctly?
Install the valve with flow direction matching the arrow on the body. Use proper gaskets and tighten flange bolts evenly. Avoid using the handwheel for leverage beyond normal operation. Refer to our installation manual included with each valve.
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