Check Valve Body

ال Check valve body is a core structural component in fluid control systems, specifically engineered to ensure unidirectional flow and prevent reverse flow in a wide range of civil, residential, and commercial applications. Designed for use in potable water pipelines, HVAC circuits, irrigation systems, and utility drainage setups, the Check valve body plays a key role in preserving system pressure and protecting pumps, meters, and valves from potential backflow damage.

Crafted with high-strength corrosion-resistant materials, the Check valve body is precision-machined to deliver exceptional sealing performance and long-term mechanical stability. Its internal geometry is optimized to reduce flow resistance while ensuring a quick, reliable closing response under reverse pressure conditions. Whether used in vertical or horizontal installations, the design ensures low cracking pressure and minimal energy loss.

Installation flexibility is another advantage—compatible with a wide range of valve internals, elastomer seats, and connection types, the Check valve body can be integrated seamlessly into both legacy and modern pipeline configurations. It is also suitable for systems operating under varying pressure ranges, temperature cycles, or intermittent flow patterns, maintaining system integrity even in dynamic environments.

Each Check valve body undergoes strict quality assurance protocols, including dimensional verification, pressure testing, and material certification to meet both industry standards and user expectations. Trusted by civil engineers, plumbers, and facility maintenance teams alike, this component is an ideal choice for robust and maintenance-free backflow prevention in fluid transport systems.

1. أكثر من 60 نوعًا من المواد، وأكثر من اثني عشر سبيكة، و70 نوعًا من الأرقام.
2. يمكن إنتاج العديد من المنتجات، أكثر من 3500 قالب صب دقيق، وأكثر من 1000 قالب صب رملي.
3. يمكن أن تكون ملحقات الإنتاج كبيرة أو صغيرة.
4. يمكن تخصيص منتج واحد يصل وزنه إلى 50 كجم.
5. تتوفر أفران متعددة للاختيار من بينها، ويمكن إنتاج قطع فردية يتراوح وزنها بين 50 كجم إلى 850 كجم.
6. 20 عامًا من الخبرة الغنية والماجستير، دخل الصناعة في الثمانينيات، وأصبح قائدًا في الصناعة.
7. المنتجات قابلة للتتبع، وكل منتج من منتجات الفرن لديه شهادة: 3.1 شهادة المواد.
8. يمكن للعملاء أن يطلبوا من وكالة اختبار خارجية إصدار شهادة 3.2.
9. يمكن إصدار شهادة معالجة للمنتجات الجيدة.

Leierwo’s advantages in casting precision castings in the valve casting industry

Leierwo has been deeply involved in the precision casting field for many years, particularly accumulating extensive experience in the manufacture of valve components. The company specializes in the production of precision castings made of carbon steel, alloy steel, and stainless steel—materials commonly used in the valve industry. By utilizing advanced technologies such as melt casting and silica sol processes, the company is able to achieve high-precision molding of complex structural parts, meeting the performance requirements of valves under high-temperature, high-pressure, and corrosion-resistant operating conditions. Furthermore, Leierwo emphasizes custom production based on customer drawings, enabling it to better match valve castings to specific customer needs, ensuring product sealing and structural stability.

اختيار المواد الرئيسية

Valve castings must withstand complex operating conditions such as pressure, temperature, and corrosion. Therefore, material selection should prioritize corrosion resistance, high-temperature strength, cavitation resistance, and good processability. Stainless steel is the preferred choice due to its excellent overall performance.

المواد الشائعة:
سلسلة الفولاذ المقاوم للصدأ:
316/316L: The best choice, resistant to chloride ion corrosion, suitable for marine environments, chemical, and petroleum industries. 304/304L: An economical material suitable for general corrosive environments. 410: Martensitic stainless steel, with some corrosion resistance, suitable for high-temperature steam valves.
17-4PH: Precipitation-hardened stainless steel, with high strength and corrosion resistance, suitable for high-performance valves.

سلسلة الفولاذ الكربوني:
WCB (carbon steel general material): Commonly used for general-purpose valves at room temperature.
4130: Suitable for high-temperature and high-pressure valve housings.
Specialty Alloy Series (for high-corrosion/high-temperature environments): 2205 duplex stainless steel: Excellent stress corrosion resistance, suitable for marine and chemical industries. Cobalt alloy (CoCr): such as Co6 and Co12, suitable for valve sealing surfaces with severe high temperature damage.

خيارات خدمة صب المفاتيح

Valves have stringent requirements for sealing and pressure resistance, and the choice of casting service directly impacts their functional reliability:

Investment casting: The preferred method for medium- and high-pressure valves. Components such as valve bodies and sealing seats often contain complex internal cavities (such as curved flow paths) and precise mating surfaces (e.g., sealing surface roughness must be ≤ Ra1.6µm). Investment casting can precisely replicate complex shapes, reduce casting defects (such as pores and shrinkage), and mitigate leakage risks. It is particularly suitable for high-pressure valves made of stainless steel and alloys.

Sand casting: Suitable for mass production of low-pressure, large-scale valves. For example, low-pressure gate valve bodies for municipal water supply have relatively simple shapes (mostly symmetrical structures), large production runs, and moderate precision requirements. Sand casting offers significant advantages in terms of low cost and high production capacity.

CNC machining: Focuses on critical mating areas. Valve flanges and stem shaft diameters must precisely align with the pipeline or actuator. After casting, CNC milling and grinding are performed to ensure flatness and perpendicularity tolerances of ≤0.02mm/m, ensuring a tight assembly.