GB/T 11691-1989 Cast Steel Suction Sea Valve | Marine-Grade Suction Valve for Seawater & Freshwater Systems
Product Overview
The GB/T 11691-1989 Cast Steel Suction Sea Valve is a heavy-duty marine valve specifically designed for seawater and freshwater applications in shipbuilding, vessel repair, and offshore platforms. Manufactured from durable cast steel with corrosion-resistant bronze internals, this suction valve ensures reliable performance in demanding marine environments. With a 0.4 MPa pressure rating and sizes from DN50 to DN500, it provides optimal flow control for various marine fluid systems while meeting international quality standards.
Key Features & Benefits
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Marine-Grade Construction: Cast steel body with aluminum bronze stem and cast tin bronze disc for superior corrosion resistance
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Dual Fluid Compatibility: Suitable for both seawater and freshwater applications
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Offshore Platform Ready: Designed for use in shipbuilding, ship repair, and offshore installations
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Custom Material Options: Available in stainless steel 304, 316L, and other materials upon request
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0.4 MPa Pressure Rating: Ideal for marine suction and fluid handling systems
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Wide Size Range: DN50 to DN500 sizes accommodate various pipeline requirements
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Sample Availability: Prototype samples provided for testing and validation
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Standard Compliance: Meets GB/T 11691-1989 Chinese national standard requirements
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Quality Assurance: Excellent craftsmanship with aesthetic design and reliable performance
Material Specification
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Body & Cover: Cast Steel (Standard)
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Stem: Aluminum Bronze
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Disc: Cast Tin Bronze
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Optional Materials: Stainless Steel 304, Stainless Steel 316L, Other Custom Materials
Technical Specifications
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Standard: GB/T 11691-1989
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Nominal Pressure: 0.4 MPa
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Nominal Diameter: DN50-DN500
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Media: Sea Water, Fresh Water
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Applications: Shipbuilding, Ship Repair, Offshore Platforms
Dimensions & Specifications (mm)
| DN | L | H | D | D1 | D2 | d0 | b | n | Th | Hand Wheel | Lift Range | Weight (kg) |
|—-|—|—|—|—|—|—|—|—|—|—|————|————|————|
| 50 | 125 | 230 | 140 | 110 | 90 | 14 | 16 | 4 | M12 | 140 | 16 | 14 |
| 65 | 145 | 240 | 160 | 130 | 110 | – | 20 | – | – | – | 17.1 | – |
| 80 | 155 | 260 | 190 | 150 | 128 | 18 | 18 | – | M16 | 160 | 24 | 21 |
| 100 | 175 | 280 | 210 | 170 | 148 | – | – | – | – | 180 | 30 | 25.7 |
| 125 | 200 | 310 | 240 | 200 | 178 | 20 | – | 8 | – | 200 | 40 | 36.5 |
| 150 | 225 | 340 | 265 | 225 | 202 | – | – | – | – | 225 | 48 | 59.8 |
| 200 | 275 | 375 | 320 | 280 | 258 | 22 | – | – | – | 280 | 60 | 80.7 |
| 250 | 325 | 425 | 375 | 335 | 312 | 24 | – | 12 | – | 360 | 70 | 121 |
| 300 | 375 | 480 | 440 | 395 | 365 | 22 | – | – | M20 | 400 | 78 | 184 |
| 350 | 425 | 560 | 490 | 445 | 415 | 26 | – | – | – | 450 | 100 | 247 |
| 400 | 475 | 640 | 540 | 495 | 465 | 28 | – | 16 | – | 500 | 110 | 324 |
| 450 | 500 | 720 | 595 | 550 | 520 | 30 | – | 16 | M20 | 550 | 150 | 440 |
| 500 | 525 | 800 | 645 | 600 | 570 | 20 | – | – | M20 | 600 | 155 | 518 |
The description/sizes may be different with goods, please check with us when order.
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