Pressure Reducing Valve Body

The Pressure Reducing Valve Body is a core structural element in modern fluid control systems, purpose-built for precise pressure regulation in both residential and commercial plumbing infrastructures. This component plays a crucial role in maintaining safe and stable downstream pressure, regardless of upstream fluctuations, thereby extending the service life of piping, fixtures, and appliances.

Manufactured from high-strength, corrosion-resistant alloys, the Pressure Reducing Valve Body is engineered to withstand continuous exposure to varying pressure loads, temperature shifts, and water quality conditions. Its internal chamber geometry is carefully designed to minimize turbulence and support smooth, laminar flow, ensuring consistent performance with minimal noise and vibration. This makes it ideal for pressure-sensitive applications such as domestic water supply systems, HVAC networks, irrigation pipelines, and industrial utility distribution.

The Pressure Reducing Valve Body is compatible with a wide variety of valve internals—spring-loaded, diaphragm-based, or pilot-operated mechanisms—allowing integration into different control systems while maintaining high sealing integrity and precise response characteristics. Whether installed in low-rise residential buildings or high-demand commercial environments, this component ensures energy-efficient operation and long-term reliability.

Each Pressure Reducing Valve Body is produced under strict quality control and undergoes pressure testing, dimensional verification, and full material traceability. Certified to comply with relevant performance standards, it is a trusted solution among plumbing professionals, facility engineers, and homeowners seeking stable and safe pressure management.

With its combination of durability, compatibility, and performance precision, the Pressure Reducing Valve Body is an essential part of any fluid distribution system where safety, efficiency, and control are paramount.

1. More than 60 kinds of materials, more than a dozen alloys, and 70 kinds of numbers.
2. Many products can be produced, 3500+ precision casting molds, 1000+ sand casting molds.
3. The production accessories can be large or small.
4. A single product of 50 kg can be customized.
5. Multiple furnaces are available for selection, and single pieces of 50 kg to 850 kg can be produced.
6. 20 years of master, rich experience, entered the industry in the 1980s, the industry leader.
7. Products are traceable, and each furnace product has a certificate: 3.1 Material Certificate.
8. Customers can ask a third-party testing agency to issue a 3.2 certificate.
9. Processing fine products can be issued with a processing certificate.

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.

Main material selection

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.

Common Materials:
Stainless Steel Series:
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.

Carbon Steel Series:
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.

Key casting service options

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.