Applications
- Drawing-defined valve closure members
- Drawing-defined seat rings
- Drawing-defined stems
- Other drawing-defined valve trim components reviewed case by case
- Related valve internals identified by geometry in the RFQ
Drawing-based hardfaced valve internals
Custom Hardfaced Valve Trim Components
Hardfaced valve seat samples specified at HRC 50+ for erosive and corrosive service
The HRC 50+ seat image and the Stellite 12/ST12 plug image document representative verified sample or order requirements only; they are not general hardness or alloy guarantees. Stellite is used only as an RFQ-specified trade-name family, not as a name for every cobalt alloy.
RF Machining supplies drawing- or sample-based finished components, not complete valves. Responsibility for complete-valve design, the pressure-retaining boundary, assembly, pressure testing, certification and valve performance remains with the valve manufacturer or design authority. Manufacturing scope is reviewed for each trim geometry and specified working surface.
- Valve trim
- Hardfaced working surfaces
- Drawing-based
What may valve trim include?
Depending on the valve design, trim may include the closure member, seat ring, cage, stem and related internals. Valve trim is not a synonym for generic valve accessories. RF Machining reviews the named component according to its drawing or sample geometry and supplies the finished-component scope accepted in the order. Applicable hardfacing routes are reviewed for each component and order. The route, filler/consumable grade, hardness, allowance, finished overlay thickness, dilution when applicable, finish machining and inspection are confirmed per drawing/RFQ/order.
Common names
- Hardfaced valve trim component
- Hardfaced closure member
- Hardfaced seat ring
- Hardfaced valve stem
- Hardfaced valve internal
Common materials
- Customer-specified base material
- RFQ-specified hardfacing or overlay alloy
- RFQ-specified trade-name alloy family only when identified by the drawing or order
Buyer concerns
- Base material identification
- Marked hardfacing or overlay area
- Filler or alloy grade
- Machining allowance
- Minimum finished overlay thickness
- Hardness requirement and test method
- Dilution requirement when applicable
- Final dimensions, surface finish and geometric tolerances
- NDT, PMI and inspection-report requirements when applicable
Managed manufacturing route
- Machining, hardfacing and related surface-treatment requirements are managed according to the agreed manufacturing route.
- Component geometry is reviewed for CNC turning, CNC milling and drawing-defined ID, OD, face or groove machining.
- Hardfacing or overlay area, alloy specification, machining allowance, finished overlay thickness, finish machining and inspection are confirmed per drawing/RFQ/order.
- Grinding and other related finishing requirements are included only when accepted in the agreed manufacturing route.
Key inspection items
- Base material verification when required
- Hardfaced or overlaid area
- Finished overlay thickness when specified
- Hardness using the specified test method
- Drawing-defined dimensions and geometric tolerances
- Surface finish
- NDT, PMI or other agreed inspection records when applicable
Documents available upon request
- Dimensional inspection report when required
- Material certificate when required
- Hardness record when required
- NDT or PMI record when agreed
- Hardfacing or process record when agreed
RFQ details to include
- Drawing, 3D model or sample photos
- Component type and geometry
- Base material grade
- Quantity
- Final dimensions, surface finish and geometric tolerances
- For welded hardfacing: filler/consumable grade, marked area, machining allowance, finished minimum overlay thickness and dilution when applicable
- Hardness requirement and test method
- NDT, PMI or inspection-report requirements when applicable
- Delivery requirement
Buyer FAQs
What does valve trim mean on this page?
Depending on the valve design, trim may include the closure member, seat ring, cage, stem and related internals. The term is used for drawing-defined valve internals, not generic valve accessories.
Can RF Machining supply finished trim components from a drawing or sample?
Yes. RF Machining supplies drawing- or sample-based finished components after the material, geometry, hardfaced area, machining scope and inspection requirements are reviewed and accepted.
Does RF Machining supply complete valves?
No. RF Machining supplies drawing- or sample-based finished components, not complete valves. Responsibility for complete-valve design, the pressure-retaining boundary, assembly, pressure testing, certification and valve performance remains with the valve manufacturer or design authority.
Are all hardfacing methods available for every trim component?
No universal process claim is made. Applicable hardfacing routes are reviewed for each component and order. The route, filler/consumable grade, hardness, allowance, finished overlay thickness, dilution when applicable, finish machining and inspection are confirmed per drawing/RFQ/order.
Does Stellite mean any cobalt hardfacing alloy?
No. Stellite is used only when an RFQ specifies that trade-name family. RF Machining does not describe every cobalt alloy as Stellite, and the requested grade remains order-specific.
Is HRC 50+ guaranteed for all hardfaced valve trim?
No. HRC 50+ is shown only as a representative verified sample or order fact. Each hardness requirement and test method must be stated in the RFQ and confirmed for the order.
Related components
Request for quotation
Send drawings or sample information
Send your drawing or sample information together with material, quantity, surface-treatment and inspection requirements. Our team will review the request and reply as soon as possible.
RFQ details to include
- Drawing or sample information
- Material requirements
- Order quantity
- Surface-treatment requirements
- Inspection requirements
- Target delivery timing