THINKTANK specializes in the production of industrial valves, focusing primarily on control valves, self-regulating pressure regulators, safety valves, and high-efficiency butterfly valves. With over three decades of experience in the industrial valve sector, I will outline the ten essential steps involved in our manufacturing process and the stringent quality control measures we undertake before shipping.
It’s important to recognize that the valve industry in China is still evolving when compared to established markets like the USA and Europe, which benefit from advanced technologies. Acknowledging this reality enables us to identify our shortcomings and implement significant improvements.
Standardization poses challenges for us, not only in managing costs, including substantial raw material inventory, but also in maintaining thorough documentation—an area where many Chinese manufacturers traditionally struggle. However, we have made incredible strides in the last decade, largely thanks to the support of our customers who have guided us in this rapid development.
Standardization involves ensuring that every component is produced in alignment with customer-approved CAD designs, corresponding with valve design standards, shell testing requirements, face-to-face dimensions, leakage classifications, and connection dimensions. We reference various standards such as MSS, API, ASME, BS, DIN, GB, and JB.
Different industrial valve types adhere to distinct standards. This information can be found within our product specifications.

Disai valves are manufactured for global distribution across various industries, prioritizing quality. Our mission is to deliver high-value products to our clients. Together, let’s create a brighter future.

• Control valve: GB/T -, ASME B16.34

• Ball valve: GB/T, API 6D, API 608, BS, DIN

• Butterfly valve: JB/T, API609, ASME B16.34, MSS SP-67, MSS SP-68

• Self-operated Pressure Regulator: JB/T -, ASME B16.34

• Gate valve: GB/T, ASME B16.34, API 6D, API 600, API602, API603, DIN

• Globe valve: GB/T, ASME B16.34, API602, BS, DIN

• Check valve: GB/T, API 6D, API 594, API602, BS

• Safety valve: GB/T -, API 520, API 526

Understanding the 10 Essential Steps in Industrial Valve Manufacturing

Step 1: Procurement of Raw Materials

Upon receiving customer approval for our drawings, datasheets, and commercial offer, we issue a Proforma Invoice, awaiting customer signatures or contract release. Once we receive the advance payment, we kickstart the sourcing of raw materials needed for manufacturing.

The selection of raw materials for industrial valves involves various grades of steel casting bodies, forged steel bodies, specialty alloy steels, and duplex steels.

Step 2: Rigorous Quality Control

Before embarking on the manufacturing process, our quality control team meticulously inspects all incoming raw materials. This includes thorough checks for the chemical composition, dimensional accuracy, and hardness testing as applicable. Successfully passed materials are marked with a 'PASSED' label.

Step 3: Precision Machining

A manufacturing procedure card is issued to the warehouse supervisor, facilitating the acquisition of raw materials needed for machining. Using CNC machines, we carefully machine components such as the body, bonnet, seats, and plugs. Each machined part undergoes rigorous inspection to verify dimensional accuracy.

Step 4: In-Process Inspection

Once parts are visually and dimensionally validated, the valve body and bonnet undergo hydrostatic testing at a test bench to ensure absolute seal integrity before assembly. Any signs of leakage necessitate rejection and return to the foundry.

Step 5: Assembly Procedures

The approved body and bonnet are transferred to the assembly section. For compatibility and interchangeability, the body and bonnet are machined accordingly. Depending on the project requirements, components such as the valve seat and plug may be lapped either prior to or following assembly. Care is taken to prevent surface scratches during component handling.

Step 6: Comprehensive Testing and Inspection

After assembly, the valve moves to the hydrostatic bench for conducting shell tests, low-pressure assessments, and seat leakage testing, as confirmed by our QA team, all while ensuring adherence to the design specifications. Successful units then advance to the painting stage.

Step 7: Surface Finishing and Coatings

Using grinders or sanders, we achieve optimal surface finishes per customer specifications. Carbon steel components receive a coat of corrosion-resistant primer, and any uneven surfaces are treated with high-temperature putty. The color of the paint is tailored to client requests, ensuring compliance with corrosion resistance standards.

Step 8: Third-party Inspection and Documentation

Following testing, painting, and functional assessments, customers may enlist third-party inspectors. Our quality assurance team diligently records all project details including names, tag numbers, models, processed checks, furnace numbers, and additional specifications.

Step 9: Packaging Standards

For packing industrial valves, we predominantly utilize plywood cases. All relevant documents, such as manuals and maintenance guidelines, are included per customer requests.

Step 10: Final Shipment Procedures

Before dispatching, all shipping marks, packing lists, and invoices are meticulously verified with customers. Upon confirmation, the goods are formally handed over to the logistics provider for shipment.

Conclusion

It's crucial for industrial valves to undergo standardized manufacturing to ensure every component adheres to established quality norms, thus promoting the reliability of valves during operation. With over 30 years of expertise in control valve manufacturing, THINKTANK—situated in Taipei, Taiwan—embraces Japanese technology to foster innovation, continually enhancing our control valve capabilities.

Get in Touch with Us

We have successfully replaced FLOWSERVE, FISHER, and SAMSON products in three projects within the Middle-East, providing OEM services for seven emerging brands. We look forward to the opportunity of collaborating with you.

Check out what our customers think of THINKTANK.

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Gate Valve - Best/Worst Manufacturers

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The company I work for is in the planning stages of installing some new package boilers. We are going to make tie-ins to our feedwater system and want to find the best (most reliable and well-built) gate valves. Does anyone have recommendations for particularly strong gate valve manufacturers? Any guidance on who excels and who should be avoided would be greatly appreciated. Thank you!

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Your request for reputable manufacturers is completely valid, yet it's essential not to focus solely on discrediting particular brands. Keep in mind, manufacturers do not survive on poor reputations alone.

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I can assure you, some manufacturers produce substandard valves. We've had products that performed for 30 years, yet others from different manufacturers fail within six months. That is unacceptable!

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For recommendations pertinent to your inquiry regarding specific materials, I suggest creating a separate thread and including material specifications, type, and pressure class for better assistance.

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