Quad Rings - Engine Room Consumables and Spares
Quad rings, also called X-rings, are elastomeric sealing rings with a four-lobed cross-section. They are used in marine engine-room equipment to prevent leakage of lubricating oil, hydraulic fluid, fuel, cooling water and air.
ProShipWorks provides end-to-end support to source and supply Quad Rings for marine vessels, ship operators, industrial facilities, maintenance teams and procurement departments.
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Product Information
| Product Name | Quad Rings |
|---|---|
| Product Category | Engine Room Consumables and Spares |
| Product Reference | 1411 |
| Brands / Manufacturers | Parker Hannifin, Apple Rubber, Marco Rubber & Plastics |
| Unit of Measure | Piece |
Key Features
| Key Feature |
|---|
| 1. Four-lobed X-shaped sealing profile |
| 2. Reduced twisting and rolling compared with conventional O-rings |
| 3. Suitable for static and selected dynamic sealing duties |
| 4. Available in NBR, FKM, EPDM and other elastomers |
| 5. Supplied in standard and custom dimensions |
Applications of Quad Rings
| Application |
|---|
| 1. Marine engine and gearbox covers, plugs and inspection fittings |
| 2. Hydraulic and pneumatic valves, actuators and pumps |
| 3. Fuel, lubricating-oil, cooling-water and seawater equipment |
Models & Manufacturers
| Model | Manufacturer |
|---|---|
| Parker Quad-Ring® Seal | Parker Hannifin |
| X-Ring Seal | Apple Rubber |
| X-Ring Seal | Marco Rubber & Plastics |
Technical Specifications
| Model | Specification | Value | Unit |
|---|---|---|---|
| Quad ring | Cross-section | Four-lobed X-profile | — |
| Quad ring | Common materials | NBR, FKM, EPDM, silicone and polyurethane | — |
| Quad ring | Typical hardness | 70 to 90 | Shore A |
| Quad ring | Size designation | AS568 or manufacturer-specific dimensions | — |
| Quad ring | Temperature range | Material-dependent; typically approximately -40 to 200 | °C |
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 | Dimensions may be selected using AS568 or ISO 3601 practices where applicable. Elastomer compounds are commonly specified using ASTM D2000 or equivalent material standards. Certification depends on material, supplier and application. |
|---|---|
| Class Approval | Quad rings are generally not inherently type-approved by DNV, ABS, Lloyd's Register, BV or ClassNK. Class acceptance may apply to the complete marine system or equipment and depends on documented material, traceability and application suitability. |
Installation, Maintenance & Safety Information
| Installation Notes | Confirm groove dimensions, seal material and fluid compatibility before installation. Clean the groove and mating surfaces, remove burrs, lubricate with compatible fluid or grease, and install without twisting, stretching or cutting the seal. |
|---|---|
| Maintenance Tips | Inspect during planned maintenance for flattening, cuts, hardening, swelling, extrusion and leakage. Replace damaged or aged seals rather than reusing them, and keep spare rings sealed, cool, dry and protected from sunlight and ozone. |
| Safety Notes | Depressurize, drain and isolate the equipment before replacement. Use seal material compatible with the fuel, oil, hydraulic fluid, chemicals and operating temperature. Do not use damaged seals or exceed the manufacturer's pressure, speed and temperature limits. |
Request a Quote for Quad Rings
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
Other Engine Room Consumables and Spares Products
Explore our range of marine and industrial Engine Room Consumables and Spares products available for sourcing and supply through ProShipWorks.
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