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Qingdao Hailong Machinery Technology Co., Ltd. is one of the leading manufacturers and suppliers of valve body casting in China, featured by quality products and good service. Welcome to buy durable valve body casting made in China here and get pricelist from our factory. Also, customized service is available.

Core Product Features

Premium Material & Pressure/Corrosion Resistance: Adopts HT250/HT300 wear-resistant gray iron, QT450/QT500 ductile iron, or 304/316L stainless steel, duplex steel (chemical/strong corrosion conditions), tensile strength ≥250MPa, pressure rating ≤4.0MPa (standard), high-pressure customizable (≤10.0MPa), acid-alkali resistant and medium-corrosion resistant, adapting to complex pipeline conditions.
Precision Casting & Excellent Sealing: Resin sand/investment precision casting process, uniform valve body wall thickness (error ≤±1mm), sealing surface roughness Ra≤0.8μm, achieving zero-leakage sealing with valve seat/core, complying with GB/T 13927, API 598 sealing standards.
Optimized Flow Channel & Low Flow Resistance: Straight-through/DC flow channel designed based on fluid mechanics principles, reducing fluid resistance loss, flow resistance coefficient ≤0.5, improving pipeline transportation efficiency and lowering energy consumption.
Stable Structure & Precise Operation: Integral casting structure, coaxiality error between valve stem hole and sealing surface ≤0.02mm, ensuring flexible opening/closing and precise positioning of valve core; reinforced design of inlet/outlet flanges, strong vibration resistance, operating noise ≤75dB.
Wide Adaptability & Easy Installation: Compatible with gate valves, ball valves, globe valves, check valves and other valve types, complying with GB, ANSI, DIN and other international standards, pre-reserved precise mounting holes and flange interfaces, efficient assembly and maintenance.

Core Process Advantages

Independent Mold Development: In-house mold workshop, supporting valve body size, flow channel structure and flange standard customization based on valve model and pipeline parameters
Full-process Quality Control: Raw material spectral inspection → temperature control during casting → non-destructive testing (UT/MT/PT) → finished product dimension and sealing performance testing, quality traceable
Cross-process Collaboration: Direct connection to in-house machining workshop after casting, one-time processing of sealing surface and valve stem hole, avoiding secondary clamping errors

Application Scenarios

Municipal water supply and drainage, sewage treatment, heating and ventilation pipeline systems
Petrochemical, natural gas transportation, chemical medium (acid-base, organic solvent) pipelines
Power industry, metallurgical industry, papermaking industry industrial pipelines
Marine, offshore engineering, high-rise building pipeline systems
Customized special working conditions (high temperature, high pressure, strong corrosion) valve supporting

Typical Application Cases

Petrochemical - Crude Oil Transportation Pipeline: Customized QT500 ductile iron valve bodies (pressure resistance 6.4MPa) for a petrochemical enterprise, adapted to gate valves for crude oil transportation, withstanding medium temperature 180℃, stable operation for 6 years without leakage.
Municipal Water Supply - Urban Water Supply Network: Supplied HT300 material ball valve bodies (DN200) for municipal pipeline valves, daily water supply capacity 8000m³, resistant to pipeline pressure fluctuations, service life over 10 years.
Chemical Industry - Acid-Base Solution Transportation: Customized 316L stainless steel globe valve bodies, adapted to 50% concentration sulfuric acid transportation pipelines, pressure rating 4.0MPa, working temperature 90℃, corrosion resistance up to standard, batch applied in 3 chemical enterprises.
Power Industry - Boiler Feed Water System: Provided duplex steel valve bodies (pressure resistance 10.0MPa), adapted to check valves for boiler feed water pipelines, withstanding high temperature 250℃, meeting strict working condition requirements of the power industry.
Marine Engineering - Ship Pipeline System: Customized marine standard valve bodies (complying with GB/T 12224), adapted to ship ballast water systems, resistant to seawater corrosion, has been supporting more than 10 ocean-going cargo ships.

Quality Assurance

Material Report: Provide raw material chemical composition, mechanical properties and corrosion resistance test reports
Performance Test: Issue pressure test, sealing performance test, non-destructive test reports
After-sales Commitment: Free repair or replacement within 18 months for non-human damage; lifelong technical consultation and adaptation guidance

Main Technical Specifications (Standard Models)

Parameter Type	Specification Range
Material Grade	HT250/HT300 Gray Iron; QT450/QT500 Ductile Iron; 304/316L Stainless Steel; Duplex Steel
Applicable Valve Type	Gate Valve, Ball Valve, Globe Valve, Check Valve, Butterfly Valve, etc.
Nominal Diameter	DN15-DN600 (Standard); DN800-DN1200 (Customization)
Pressure Rating	≤4.0MPa (Standard); 6.4-10.0MPa (High-pressure Customization)
Working Temperature	-40℃-150℃ (Standard); 150℃-350℃ (High-temperature Customization)
Key Accuracy	Wall Thickness Error ≤±1mm; Sealing Surface Roughness Ra≤0.8μm; Coaxiality Error ≤0.02mm
Surface Treatment	Shot blasting derusting + anti-rust paint (Standard); Pickling and passivation (Stainless Steel); Rubber/Fluorine Lining (Anti-corrosion Customization)
Service Life	≥10 Years (Normal Working Conditions); ≥8 Years (Chemical Corrosion Conditions)