Concentric Manual Butterfly Valve | Compact Marine Fluid Control
A manually operated valve with a highly compact structure. The stem axis, disc center, and body center align perfectly. It achieves reliable sealing through the elastic deformation of its seat. Best suited for standard networks operating under 120°C.
Accreditation and Certificates:
Standard marine pipelines require simple and fast shutoff tools. Concentric manual butterfly valves fit this requirement perfectly. The axes of the stem, disc, and body all share the exact same center point. This straight configuration keeps volume and weight to an absolute minimum. The sealing surface maintains constant contact with the seat during rotation. Squeezing and scraping generate the tight elastic deformation needed to block fluids. Daily pipeline operation remains incredibly fast and straightforward.
Technical Specifications：
| Parameter | Specification |
| Nominal Diameter | DN50 to DN600 |
| Working Pressure | 0.1MPa to 1.6MPa |
| Temperature Limit | ≤120°C |
| Material | Cast steel, Bronze, Stainless steel |
| Connection Type | Wafer, Flange, Lug types |
Key Features：
- Small Footprint: Saves valuable pipeline installation space significantly.
- Fast Operation: Low driving torque completes opening or closing actions quickly.
- Elastic Sealing: Squeezing the seat creates a tight, leak proof effect.
- Flexible Mounting: Installation remains unaffected by flow direction, allowing mounting in any position.
Applications：
- Ship cooling water system: Controls the on/off and flow regulation of cooling water.
- Bilge water discharge system: Manages the discharge of accumulated water in the engine room bilge.
- Ballast water system: Regulates the intake and discharge of water in the ship’s ballast tanks.
Installation & Maintenance：
Orientation flow paths do not matter during installation. Maintenance crews must check the rubber seat for wear regularly. Constant friction between the disc and seat dictates that operators must replace the seal after heavy use.
Custom Options Available：
Buyers can select handle, spiral, or worm gear driving mechanisms based on operational needs. Specific models expand up to DN1000 in size for massive pipe networks. We provide customization services based on international standards such as ANSI, JIS, and DIN, ensuring compatibility with different global market requirements.
FAQ ：
Q: What fluids can pass through this valve safely?
A: It safely handles seawater, fresh water, air, and oil.
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