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Customized Casting Carbon Steel Pipe System Butterfly Valve Part Valve Disc
US$0.69-3.49
100 Pieces
Sample price:US$0.79/piece.Request sample
Product profile
Customization
AvailableMedia
OilDriving Mode
ElectricModel NO.
SA-DBConnection Form
FlangeStructure
Double-Eccentric SealingSeal Form
Auto SealedValve Stem
ExtendedWork Pressure
Low Pressure (Pn<1.6mpa)Working Temperature
Medium Temperature (120°C<T<450°C)Material of Seal Surface
Soft SealedValve Body
CastingStandard
Contact UsApplication
Industrial Usage, Water Industrial Usage, Household UsageItem
Valve DiscCasting Method
Special CastingSurface Roughness
Ra0.4Raw Material
Carbon Steel, Stainless SteelTolerance
+-0.2 or as DrawingsTechnology
Precision Casting + MachiningService
Shengao, OEMColor
Nature or as RequestExport Markets
GlobalOEM and ODM
100% with DrawingsInspection
Slide Caliper, Microcaliper, ProjectorName
Butterfly ValveLogo Printing
CustomizedMOQ
10-1000PCSFree Sample
YesTransport Package
Iron Box, Plywood BoxSpecification
ASTM, GB, DIN, EN124, CETrademark
ShengaoOrigin
Weifang City. Shandong Province. ChinaHS Code
7325109000Production Capacity
500ton/MonthKey features
OEM & Customization: Full customization support with drawings, including logo printing and specific color requests.
Advanced Casting Process: Utilizes lost wax investment casting for complex geometries, high precision, and excellent surface finish.
High Production Capacity: Annual supply capacity of 20,000 tons with independent CNC machining and heat treatment facilities.
Wide Material Selection: Supports Carbon Steel, Stainless Steel, Alloy Steel, and various other alloys for diverse applications.
Strict Quality Control: ISO9001 certified with NDT (PT/RT), PMI analysis, and third-party inspection options.
Global Market Presence: Exporting globally with significant market share in Europe, USA, and Asia.
Flexible MOQ: Low MOQ starting from 1-5 pcs for prototypes, scaling up to 1000 pcs for production.
Reverse Engineering: Capable of 3D scanning and CAD reconstruction from worn samples or fragments.
Company profile
Business Type: Manufacturer/Factory CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc.Export Year: 2010-04-06 CertifiedNearest Port: Qingdao PortAverage Response Time: ≤2.26h CertifiedTerms of Payment: LC, T/T, D/P, etc.
AI-Powered supplier vetting
SummaryWeifang Shengao Machinery Co., Ltd. is a limited company focused on mechanical parts, hardware, metal tools, CNC machine tools, and related components. It identifies as a professional technical supplier and offers 3D software design and broad customization services, including sample-, design-, full-, minor-, and flexible customization. The supplier has written procedures and records for service assessment, corrective actions, and complaint handling. Its export sales share is stated at 71%–90%, with three years of export experience. However, the supplier has nine employees, only two years of total R&D engineer experience, no new products in the past year, no ODM, SDK, or overseas service infrastructure, and no stated customer cases. Audit information is provided for a TUV Rheinland audit with a validity period from September 4, 2025 to September 3, 2026, but the evaluation result is recorded as 0 and no certification name is specified.
Supplier typeThe supplier explicitly identifies as a professional technical supplier and a limited company. Its stated business and product scope covers mechanical parts, hardware products, metal tools, CNC machine tools, functional components, forgings, and powder metallurgy products; the audit record identifies mechanical parts as the primary product.
After-Sales capabilityThe supplier has clear written procedures and followed records for corrective and preventive actions and for handling customer complaints. This directly supports an established service-response process, although the slices do not provide service performance results or response-time data.
Production capacityThe supplier reports an annual production output range, six to ten quality-control staff, on-time delivery, random production quality inspection, and its own factory. It has nine total employees, so the available evidence supports an operating production capability, while capacity beyond the stated output range cannot be determined.
Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization, and also welcomes OEM and ODM requests according to its company description. These repeated statements provide direct evidence of broad customization coverage, although the separate record states that ODM is not available, creating a conflict on ODM specifically.
Product Q&A
Q:What is an Investment Casting Butterfly Valve Disc?
A:
It is the core rotating component inside a butterfly valve, also called the valve plate or vane. Shaped like a disc, it rotates on a shaft to control or shut off fluid flow. Manufactured via investment casting (lost-wax casting), this process allows for complex geometries, excellent surface finish, and high dimensional accuracy in a wide range of metal alloys.
Q:What are the advantages of investment casting for valve discs?
A:
Design Flexibility: Produces complex, near-net-shape parts with integrated features (like shafts, profiles, contours) that are difficult or impossible with other methods. Superior Surface Finish: As-cast surface finish is excellent, reducing post-machining and improving flow characteristics. Material Versatility: Can cast a vast range of alloys, including stainless steel, duplex, super duplex, Hastelloy, Monel, and carbon steel. Dimensional Accuracy & Consistency: High precision for tight tolera
Q:What types of butterfly valve discs do you produce?
A:
We cast discs for all major valve designs and applications: Concentric (Resilient-Seated) Discs: For general service with rubber/elastomer liners. Double/ Triple Offset (High-Performance) Discs: The disc profile is offset from the seat and shaft centerline to reduce wear and enable tight shut-off in metal-seated valves. Lug & Wafer Style Discs: For different mounting configurations. V-Port/ Characterized Discs: For precise flow control (equal percentage, linear characteristics). Custom/Proprieta
Q:What materials are commonly used?
A:
Material selection is based on fluid media, pressure, temperature, and corrosion requirements: Stainless Steel: CF8 (A351, equivalent to 304), CF8M (A351, equivalent to 316) - Most common for corrosive services. Duplex & Super Duplex Stainless Steel: CD3MN (F51/2205), CD3MWCuN (F55/2507) - For high strength and chloride stress corrosion cracking resistance. Alloy 20 (CN7M): For sulfuric acid applications. Monel (M35-1/ N04400), Hastelloy (N10276): For severe corrosive environments. Carbon Steel
Q:What post-casting processes are included?
A:
We provide a complete, ready-to-install disc: Heat Treatment: Solution annealing, quenching, tempering as per material specifications (ASTM A351, A743, A744). Precision CNC Machining: Critical surfaces are machined: Sealing surface (perimeter edge) to required Ra finish and angle. Shaft bore(s) to precise diameter and perpendicularity. Mounting holes/ features. Non-Destructive Testing (NDT): Liquid Penetrant Testing (PT) or Radiographic Testing (RT) as specified to detect surface/subsurface defe
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