Butterfly Valve Seats - Pumps, Valves, Piping and Fittings
Replacement elastomeric or polymer seats fitted in concentric, double-eccentric, or triple-offset butterfly valves used in marine seawater, ballast, bilge, fire-main, cooling-water, and general service piping. Seat selection depends on valve design, fluid, temperature, pressure, and shaft-disc compatibility.
ProShipWorks provides end-to-end support to source and supply Butterfly Valve Seats for marine vessels, ship operators, industrial facilities, maintenance teams and procurement departments.
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Product Information
| Product Name | Butterfly Valve Seats |
|---|---|
| Product Category | Pumps, Valves, Piping and Fittings |
| Product Reference | 666 |
| Brands / Manufacturers | Bray, KSB, DeZURIK, Valmet, Emerson Keystone |
| Unit of Measure | Piece |
Key Features
| Key Feature |
|---|
| 1. Available in EPDM, NBR, FKM, PTFE, and other engineered compounds |
| 2. Provides shutoff sealing between the disc and valve body |
| 3. Suitable grades available for seawater and cooling-water service |
| 4. Designed for replacement during valve overhaul |
| 5. Must match the original valve model, size, pressure class, and seat design |
Applications of Butterfly Valve Seats
| Application |
|---|
| 1. Seawater cooling and ballast systems |
| 2. Bilge, fire-main, and general service piping |
| 3. HVAC, freshwater, fuel, and cargo piping systems where chemically compatible |
Models & Manufacturers
| Model | Manufacturer |
|---|---|
| Series 20/21 butterfly valve seat | Bray |
| BOAX-B butterfly valve seat | KSB |
| BAW butterfly valve seat | DeZURIK |
| Keystone GR butterfly valve seat | Emerson Keystone |
| L-series butterfly valve seat | Valmet |
Technical Specifications
| Model | Specification | Value | Unit |
|---|---|---|---|
| General marine butterfly valve seat | Common seat material | EPDM | — |
| General marine butterfly valve seat | Alternative seat material | NBR | — |
| General marine butterfly valve seat | Chemical and temperature-resistant option | FKM or PTFE, subject to manufacturer compatibility | — |
| General marine butterfly valve seat | Applicable valve standard | EN 593 or API 609 | — |
| General marine butterfly valve seat | Face-to-face reference | ISO 5752 or EN 558 | — |
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 | Valve assemblies may be designed and tested to EN 593, API 609, ISO 5208, ISO 5752, or EN 558. Elastomer compound selection may reference ASTM D2000 or equivalent manufacturer specifications. Certification depends on the complete valve assembly, not the seat alone. |
|---|---|
| Class Approval | Marine-approved butterfly valve assemblies may be type-approved or accepted by DNV, ABS, Lloyd's Register, Bureau Veritas, or ClassNK. Approval is manufacturer-, valve-series-, size-, and service-specific; replacement seats should be original or approved equivalents. |
Installation, Maintenance & Safety Information
| Installation Notes | Verify valve manufacturer, series, nominal size, pressure class, seat design, material, and temperature range before ordering. Isolate, depressurize, drain, and lock out the line. Clean the body and disc, lubricate only with a seat-compatible lubricant, and perform leak and operational tests after installation. |
|---|---|
| Maintenance Tips | Inspect seats during scheduled valve overhauls for cuts, hardening, swelling, extrusion, permanent deformation, and leakage. Keep compatible spare seats in a cool, dry, dark location away from ozone, oil, solvents, and direct sunlight. Replace damaged seats rather than machining elastomeric sealing surfaces. |
| Safety Notes | Confirm the line is fully isolated, depressurized, drained, and safe before dismantling the valve. Use the correct material for the fluid, temperature, pressure, and fire-safety requirements. Do not use an elastomer seat outside its chemical or temperature limits, and follow the valve manufacturer's torque and assembly instructions. |
Request a Quote for Butterfly Valve Seats
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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