CB/T 692-94 Oil Tank Breather Valve | Pressure Vacuum Relief Valves for Marine Fuel Tanks
Product Overview
The CB/T 692-94 Oil Tank Breather Valve is an essential pressure-vacuum relief device designed for marine fuel and oil tank ventilation systems. Manufactured to Chinese Ship Standard CB/T 692-94, this breather valve ensures safe tank breathing by maintaining optimal pressure levels while preventing vapor emissions. Featuring cast steel construction with stainless steel and bronze components, it provides reliable performance in marine environments where tank pressure management is critical.
Key Features & Benefits
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✅ CB/T 692-94 Certified: Complies with Chinese marine standard specifications
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✅ Dual Function Design: Manages both pressure relief (≤0.021MPa) and vacuum relief (<-0.007MPa)
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✅ Marine-Grade Materials: Cast steel body with stainless steel guide rod and aluminum bronze stem
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✅ Tank Safety Protection: Prevents overpressure and vacuum conditions in oil storage tanks
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✅ Custom Material Options: Cast iron, SS304, SS316L available upon request
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✅ Vapor Emission Control: Reduces hydrocarbon emissions during tank breathing
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✅ Quality Assurance: Rigorous manufacturing controls ensure reliable performance
Technical Specifications
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Design Standard: CB/T 692-94
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Body & Cover Material: Cast Steel
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Guide Rod Material: Stainless Steel
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Stem Material: Aluminum Bronze
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Pressure Rating: ≤0.021MPa (pressure valve), <-0.007MPa (vacuum valve)
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Nominal Diameter: 80/100mm, 100/150mm
Dimensions & Specifications
Structural Dimensions:
| DN (mm) | H | H1 | L | L1 | Thickness (Cast Iron) | Thickness (Cast Steel) | A | B |
|---|---|---|---|---|---|---|---|---|
| 80/100 | 248 | 330 | 100 | 10 | 8 | 6 | 260/380 | 135/220 |
| 100/150 | 290 | 500 | 136 | 25 | 9 | 7 | 300/500 | 140/304 |
Flange Dimensions:
| DN (mm) | D | D1 | D2 | b | d0 | n-Th | D’ | D1′ | D2′ | b’ | d0′ | n-Th |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 80/100 | 170 | 138 | 118 | 14 | 15 | 8-M14 | 190 | 158 | 138 | 14 | 15 | 8-M14 |
| 100/150 | 190 | 158 | 138 | 240 | 208 | 190 | 12 |
Applications
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Marine fuel oil storage tanks
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Lubricating oil tank ventilation systems
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Offshore platform storage tanks
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Shipboard cargo tank breathing
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Bilge and sludge tank ventilation
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Emergency generator fuel tanks
The description/sizes may be different with goods, please check with us when order.
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