CBM 1050-81 Cast Steel Check Valve – Marine Non-Return Valve for Backflow Prevention
Overview
Our CBM 1050-81 Cast Steel Check Valve is a high-performance marine non-return valve designed to prevent backflow and protect critical equipment in shipboard systems. Manufactured to Chinese Boat Standard CBM 1050-81 specifications, this cast steel swing check valve ensures unidirectional flow to prevent pump and motor reversal while maintaining system integrity. With 1.0 MPa pressure rating and sizes from DN50 to DN250, it offers reliable backflow prevention for various marine applications, certified by all major IACS classification societies including RINA, BV, NK, LR, KR, DNV, CCS, and ABS.
Key Features & Benefits
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CBM 1050-81 Standard Compliance: Precision-engineered to Chinese Boat Standard specifications
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Reliable Backflow Prevention: Effectively prevents medium reversal and protects equipment
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Cast Steel Construction: ZG230-450 cast steel body and cover for durability in marine environments
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1.0 MPa Pressure Rating: Suitable for medium-pressure marine applications
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Wide Size Range: Available from DN50 to DN250 (2″ to 10″) for various system requirements
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Multi-Media Application: Suitable for water, oil, steam, gas, and various marine fluids
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IACS Certification: Approved by RINA, BV, NK, LR, KR, DNV, CCS, ABS
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Material Upgrade Options: Enhanced materials available for specific service conditions
Technical Specifications
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Design Standard: CBM 1050-81
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Pressure Rating: 1.0 MPa (150 psi)
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Temperature Range: -20°C to 425°C
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Body Material: ZG230-450 Cast Steel
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Cover Material: ZG230-450 Cast Steel
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Disc Material: 25 Carbon Steel
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Nominal Diameter: DN50 to DN250 (2″ to 10″)
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Operation: Automatic swing check operation
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Media: Water, Oil, Steam, Gas, Marine Fluids
Dimension Table (CBM 1050-81 Standard)
| DN (mm) | L | H | D | C | g | h | t | A | B |
|———|—|—|—|—|—|—|—|—|—|—|
| 50 | 220 | 120 | 110 | 201 | 155 | 120 | 100 | 19 | 16 |
| 65 | 270 | 130 | 124 | 221 | 175 | 140 | 120 | 18 | – |
| 80 | 300 | 140 | 151 | 250 | 185 | 150 | 130 | – | – |
| 100 | 350 | 160 | 165 | 276 | 210 | 175 | 155 | – | – |
| 125 | 420 | 180 | 184 | 304 | 250 | 210 | 185 | 23 | 20 |
| 150 | 490 | 205 | 210 | 345 | 280 | 240 | 215 | 22 | – |
| 175 | 530 | 215 | 238 | 383 | 305 | 265 | 240 | – | – |
| 200 | 570 | 230 | 275 | 443 | 330 | 290 | 265 | – | – |
| 250 | 740 | 290 | 327 | 519 | 400 | 355 | 325 | 25 | 24 |
The description/sizes may be different with goods, please check with us when order.
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