The machining of stainless steel pumps and valves is an essential process in the manufacturing of high-strength, durable industrial components. In sectors such as Oil & Gas, petrochemical, water treatment, and cryogenics, accuracy in CNC machining of these parts is key to ensuring their performance and reliability. At Asimer Group, we offer advanced CNC technology solutions to maximize efficiency and precision in the machining of stainless steel pumps and valves, always aiming to optimize costs without compromising quality.
In our metrology room, we conduct quality inspections using advanced tools and measuring instruments to ensure precision in every machined piece. Additionally, the use of a measuring arm allows us to verify tolerances in complex components, ensuring a perfect fit in each industrial valve and pump.
Why is stainless steel machining key for pumps and valves?
Stainless steel is highly resistant to corrosion and wear, making it the ideal choice for applications involving high-pressure fluids and extreme temperatures. Additionally, its mechanical properties enable CNC machining to achieve high-precision finishes, minimizing tolerances in the components.
Advantages of stainless steel in pumps and valves
- Corrosion Resistance: Ideal for humid and aggressive environments, ensuring a longer lifespan for components.
- High Durability: Minimizes maintenance costs and extends the performance of pumps and valves.
- Precision in CNC Machining: Enables the manufacturing of components with strict tolerances, ensuring a perfect fit.
- Versatility: Widely used in sectors such as Oil & Gas, chemical, pharmaceutical, and water desalination due to its reliability in extreme conditions.
- Compliance with Regulations: Manufactured under API, ASME, and ISO 9001 standards, ensuring safety and quality in every component.

Advanced processes in the machining of stainless steel pumps and valves
At Asimer Group, we use state-of-the-art CNC machining technologies to ensure maximum precision in manufacturing centrifugal pumps and stainless steel valves. Below are some key processes:
1. CNC Turning
Turning stainless steel enables the machining of industrial pump bodies and cylindrical components with high precision. Specialized tools are used to reduce wear and optimize production times. This process is essential in the manufacturing of centrifugal pump parts, flow control valves, and needle valves.
2. High-precision milling
Milling stainless steel is crucial for machining cryogenic valves that require complex geometries. With multi-axis CNC equipment, we achieve high-quality finishes in critical components. This process is used in machining centrifugal pump casings, diaphragm valves, and components requiring exact adjustments.
3. Cavity boring
This process is fundamental for machining pressure chambers in centrifugal pumps and control valves. Thanks to CNC machining, uniformity in the internal dimensions of components is ensured, allowing for optimal fluid flow and reducing pressure losses.
In sectors like Oil & Gas, where connections must withstand high pressures and extreme temperatures, specialized fittings are commonly used to ensure safe and efficient assembly.
4. Grinding for tolerance adjustment
High-precision grinding allows for ultra-fine finishes on critical surfaces, ensuring a perfect fit in axial flow check valves, butterfly valves, and mechanical seals. Additionally, this process is key to reducing friction and improving energy efficiency in pumping systems.
To ensure that machined components maintain their precision and quality after grinding, Asimer Group applies rigorous control with non-destructive testing. Methods such as liquid penetrant testing allow us to detect microscopic defects without compromising the structural integrity of the piece, ensuring its reliability before delivery to the client.
Relationship between machining and welding in the manufacturing of stainless steel pumps and valves
CNC machining and TIG welding are complementary processes in the manufacturing of industrial valves, ensuring both dimensional precision and structural strength. In applications where components are exposed to aggressive environments, welding for corrosive environments plays a key role in preventing premature failures and ensuring the durability of the component.
For high-precision joints, especially in the serial production of stainless steel components, chip removal machining is combined with automatic MIG welding, optimizing manufacturing times without compromising quality. Understanding the differences between TIG and MIG welding is essential for selecting the most suitable method according to the specific requirements of each application.
Success stories: CNC machining of stainless steel pumps and valves
At Asimer Group, we have worked with leading manufacturers in the industrial pumps and valves sector. A recent case included:
Project of 10 Axial Flow Valve Bodies, 24”x20” 600# RTJ, in CF8, including:
- Pre-machining, performed on Trevisan DS900 and CNC Vertical Lathe.
- Complete manufacturing (material procurement, pre-machining, hard coating with Stellite Gr.6 according to WPS & PQR), final machining, and non-destructive testing (NDTs) of 10 rings.
- Welding of the rings onto the seat of the axial flow valve bodies, following WPS & PQR.
- Final machining of the 10 axial flow valve bodies, and non-destructive testing (NDTs), carried out on the Trevisan DS600.
These Axial Flow Valves are particularly suitable for upstream applications and for HIPPS, ESD applications. The pressure does not affect operational forces, and the valve can open against total differential pressure.
Why choose Asimer Group for stainless steel pump and valve machining?
Selecting the right provider for CNC machining of industrial pumps and valves is key to ensuring quality, precision, and efficiency. At Asimer Group, we stand out from the competition due to the following factors:
Cutting-edge technology
We have state-of-the-art CNC machining centers capable of achieving tolerances up to ±0.01 mm, ensuring maximum precision in every component.
Industry experience
We work with leading manufacturers in the pumps and valves sector, with projects completed in industries such as Oil & Gas, petrochemical, cryogenics, and water treatment.
Rigorous quality control
We have a metrology room equipped with high-precision instruments and apply non-destructive testing to guarantee the reliability of each piece before delivery.
Cost and lead time optimization
We implement efficient machining processes that reduce material waste and optimize production time, allowing for competitive costs without compromising quality.
Customized solutions
Each project is unique. We tailor our machining processes and materials to meet the specific needs of each client, ensuring that pumps and valves comply with the most demanding technical requirements.
🚀 Working with Asimer Group means partnering with a strategic supplier that provides high-precision machining solutions, ensuring reliability and durability in every component.

Optimize stainless steel pump and valve machining
Do you need high-precision stainless steel pump and valve machining? At Asimer Group, we are ready to assist you. Contact our team for personalized advice and a customized quote.
📩 Email: info@asimergroup.com
🌐 Website: https://www.asimergroup.com/
📞 Phone: +34 946 714 747
Trust Asimer Group for precision machining. Contact us today and optimize the manufacturing of your industrial pumps and valves.
⚙️ Optimize Your Production with Precision Machining
Contact Asimer Group today and receive personalized advice.
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Follow us on LinkedInFrequently asked questions
What are the benefits of machining stainless steel pumps and valves?
Stainless steel offers corrosion resistance, high durability, and CNC machining precision, reducing maintenance costs.
What types of stainless steel does Asimer Group machine?
We work with AISI 304, AISI 316, Duplex, Super Duplex, and 17-4PH, ideal for various industrial applications.
What tolerances can be achieved in stainless steel machining?
At Asimer Group, we achieve tolerances up to ±0.01 mm in CNC and ±0.002 mm in grinding, ensuring precision in every component.