Gate Valve Bonnets - Pumps, Valves, Piping and Fittings
Gate valve bonnets are removable pressure-retaining components fitted to marine gate valves. They enclose the stem and packing area and are replaced during valve overhaul or when damaged, always matching the original valve body, pressure class, material and manufacturer.
ProShipWorks provides end-to-end support to source and supply Gate Valve Bonnets for marine vessels, ship operators, industrial facilities, maintenance teams and procurement departments.
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Product Information
| Product Name | Gate Valve Bonnets |
|---|---|
| Product Category | Pumps, Valves, Piping and Fittings |
| Product Reference | 674 |
| Brands / Manufacturers | KSB, Velan, KITZ, Crane, AVK |
| Unit of Measure | Piece |
Key Features
| Key Feature |
|---|
| 1. Bolted, screwed or pressure-seal bonnet construction |
| 2. Provides stem and packing enclosure |
| 3. Pressure-retaining component of the valve |
| 4. Available in cast steel, stainless steel, bronze or ductile iron |
| 5. Requires compatibility with the original valve body and trim |
Applications of Gate Valve Bonnets
| Application |
|---|
| 1. Sea water, ballast and bilge piping systems |
| 2. Fire main, cooling water and general service lines |
| 3. Fuel oil, lubricating oil and steam piping systems |
Technical Specifications
| Model | Specification | Value | Unit |
|---|---|---|---|
| Gate valve bonnet | Applicable valve standards | API 600, API 602, BS 1873 or EN 1984, depending on valve design | — |
| Gate valve bonnet | Pressure-temperature design | ASME B16.34 or applicable manufacturer design standard | — |
| Gate valve bonnet | Flange compatibility | ASME B16.5, ASME B16.47, EN 1092-1 or JIS standard as applicable | — |
| Gate valve bonnet | Common materials | Carbon steel, stainless steel, bronze, ductile iron or alloy steel | — |
| Gate valve bonnet | Nominal size | Must match the original valve size and pressure rating | — |
Standards, Certifications & Class Approval
Review the available standards and approval information relevant to the product. Actual certification, material traceability, inspection and classification requirements depend on the product type, intended application and purchasing specification.
| Applicable Standards & Certification | Applicable standards may include API 600, API 602, BS 1873, EN 1984, ASME B16.34, API 598 and ISO 5208. The correct standard depends on the complete valve design, service and manufacturer. |
|---|---|
| Class Approval | DNV, ABS, Lloyd's Register, Bureau Veritas and ClassNK may approve complete marine valves for specified services. A replacement bonnet is normally accepted only when it is an OEM or approved equivalent compatible with the class-approved valve. |
Installation, Maintenance & Safety Information
| Installation Notes | Verify valve manufacturer, size, pressure class, bonnet type, material, gasket dimensions and stem arrangement before installation. Isolate, drain and depressurize the line. Fit a new compatible gasket and tighten bonnet fasteners using the manufacturer's specified sequence and torque. |
|---|---|
| Maintenance Tips | Inspect bonnet bolts, gasket joints, stem packing and corrosion during valve overhauls. Check for leakage and correct packing compression. Replace damaged bonnets, studs, nuts, gaskets and packing with approved parts. |
| Safety Notes | Confirm the valve is fully isolated, depressurized, drained and electrically or mechanically secured before bonnet removal. Treat steam, fuel, chemicals and seawater systems as hazardous. Use suitable lifting equipment and personal protective equipment. |
Request a Quote for Gate Valve Bonnets
Contact ProShipWorks for marine or industrial product sourcing, quotations and delivery.
- Vessel name and IMO number
- ETA / vessel schedule
- Berth or vessel location
- Required quantity
- Preferred delivery window
- Shipping agent contact details
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