O Rings - Pumps, Valves, Piping and Fittings
O-rings are circular elastomeric seals used in marine pumps, valves, pipe couplings, hydraulic equipment and instrumentation. Correct material, size, hardness and pressure rating are essential for reliable sealing in seawater, oils, fuels, steam and hydraulic systems.
ProShipWorks provides end-to-end support to source and supply O Rings for marine vessels, ship operators, industrial facilities, maintenance teams and procurement departments.
Last updated:
Product Information
| Product Name | O Rings |
|---|---|
| Product Category | Pumps, Valves, Piping and Fittings |
| Product Reference | 165 |
| Brands / Manufacturers | Parker Hannifin, Trelleborg Sealing Solutions, Freudenberg Sealing Technologies |
| Unit of Measure | Piece |
Key Features
| Key Feature |
|---|
| 1. Available in NBR, EPDM, FKM, silicone and PTFE-encapsulated constructions |
| 2. Standardized metric and imperial sizes |
| 3. Suitable for static and selected dynamic sealing applications |
| 4. Resistant to pressure, temperature, oils, fuels or seawater depending on compound |
| 5. Compact replacement seal for pumps, valves, flanges and fittings |
Applications of O Rings
| Application |
|---|
| 1. Mechanical seals, covers and casing joints in marine pumps |
| 2. Valve stems, bonnets, seats and actuator assemblies |
| 3. Pipe couplings, hydraulic systems, fuel systems and marine fittings |
Technical Specifications
| Model | Specification | Value | Unit |
|---|---|---|---|
| General marine service | Common material | NBR | — |
| General marine service | Typical hardness | 70 Shore A | Shore A |
| General marine service | Size standard | ISO 3601 or AS568 | — |
| Seawater and steam service | Common material | EPDM | — |
| Fuel, oil and high-temperature service | Common material | FKM | — |
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 | Common dimensional standards include ISO 3601, AS568 and BS 1806. Material and performance requirements may also be specified by ASTM D2000 or manufacturer compound data. Certification depends on the complete equipment and service application. |
|---|---|
| Class Approval | O-rings generally do not have universal standalone class approval. Acceptance is normally based on the approved pump, valve or piping equipment, approved material specification and applicable requirements of DNV, ABS, Lloyd's Register, Bureau Veritas or ClassNK. |
Installation, Maintenance & Safety Information
| Installation Notes | Verify groove dimensions, O-ring size, material, hardness and service compatibility. Clean the groove and mating surfaces, lubricate with a compatible lubricant, avoid twisting or stretching, and protect the seal from sharp edges during installation. |
|---|---|
| Maintenance Tips | Inspect for flattening, cuts, cracking, swelling, extrusion and hardening during planned maintenance. Replace damaged or removed O-rings rather than reusing them, and store spares sealed, cool, dry and away from sunlight, ozone and chemicals. |
| Safety Notes | Depressurize, drain and isolate the system before replacement. Use only materials compatible with the fluid and temperature. Do not substitute EPDM in oil service or NBR in unsuitable high-temperature or chemical service without manufacturer confirmation. |
Request a Quote for O 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 Pumps, Valves, Piping and Fittings Products
Explore our range of marine and industrial Pumps, Valves, Piping and Fittings products available for sourcing and supply through ProShipWorks.
Why ProShipWorks?
Trusted & Professional Service
Experienced maritime professionals focused on quality, safety and dependable service execution.
24/7 Rapid Response
Fast response for planned and urgent vessel requirements, whenever support is needed.
Unbeatable Prices
Cost-effective marine services with competitive and transparent pricing for vessel requirements.
Port & Anchorage Coverage
Reliable marine service support across ports, anchorages and offshore locations.