In industrial piping systems, controlling and regulating the flow of fluid plays an important role in ensuring stable, safe, and efficient system operation. The KITZ 10SJBF and 10SJ ductile iron globe valves are industrial valve series designed according to the JIS 10K standard, with a ductile iron valve body and stainless steel internal components, providing high durability, good sealing capability, and stable operating performance. Thanks to the optimized design and quality materials, this valve series is widely used in water, steam, oil, gas, and HVAC systems across many industrial applications.

1. Introduction to KITZ 10SJBF / 10SJ ductile iron globe valve

The ductile iron globe valves KITZ 10SJBF and 10SJ are industrial valve series designed to regulate and control the flow rate of fluid in piping systems. The product is manufactured according to the JIS 10K standard, with a valve body made of ductile iron (Ductile Iron) combined with stainless steel components to ensure high mechanical durability, good sealing capability, and long service life.

This valve series is widely used in systems for water, steam, compressed air, and oil, especially in industries such as power generation, chemical processing, HVAC, manufacturing plants, and water treatment systems.

2. Overview of the KITZ JIS 10K ductile iron globe valve series

KITZ globe valves belong to a valve series designed according to the JIS 10K pressure standard, which is one of the common standards used in industrial systems in Asia. The globe valve design allows more accurate flow regulation compared to quick open-close valves such as gate valves.

The main characteristics of the KITZ globe valve series include:

• Inside Screw design which helps protect the valve stem threads from the external environment
• Screwed Bonnet structure which increases the sealing capability and durability of the valve
• Stable flow regulation capability
• High sealing performance thanks to the disc and seat ring structure

3. Structure and operating principle of the globe valve

The globe valve operates based on the principle of opening and closing by the linear movement of the valve disc perpendicular to the flow direction. When the handwheel is rotated, the valve stem moves up or down, thereby moving the valve disc to open or close the flow.

3.1 Valve body (Body)

The valve body is the main component that withstands the pressure of the system. In the KITZ 10SJBF and 10SJ valve series, the body is manufactured from ductile iron FCD-S, which has good pressure resistance and high durability.

3.2 Bonnet

The bonnet is connected to the valve body by a threaded structure, forming a chamber that contains the operating mechanism of the valve. The bonnet material is also ductile iron FCD-S, ensuring durability and pressure resistance.

3.3 Valve stem (Stem)

The valve stem is the component that transmits movement from the handwheel to the valve disc. The stem of this valve series is manufactured from stainless steel SUS420J2, which has corrosion resistance and high mechanical durability.

3.4 Valve disc (Disc)

The valve disc is the component that directly contacts the fluid flow to perform the opening and closing function. The disc is usually manufactured from stainless steel SUS403, helping to increase wear resistance and improve the service life of the valve.

3.5 Seat ring and sealing system

The seat ring is the surface that contacts the valve disc to create sealing when the valve is closed. In this valve series, the seat ring is manufactured from stainless steel 403SS, ensuring sealing capability and good wear resistance.

3.6 Packing and gland

The packing and gland system is used to prevent fluid leakage along the valve stem. The packing material is usually graphite or non-asbestos material, helping to ensure sealing capability under high temperature and pressure conditions.

3.7 Handwheel

The handwheel is the manual operating component of the valve, allowing the user to adjust the opening and closing position of the valve disc easily.

4. Valve materials according to the technical drawing

According to the construction drawing of the KITZ globe valve, the main materials used include:

• Body: Ductile Iron FCD-S
• Bonnet: Ductile Iron FCD-S
• Stem: Stainless Steel SUS420J2
• Disc: Stainless Steel SUS403
• Seat Ring: Stainless Steel 403SS
• Packing: Non-Asbestos Packing / Graphite Packing
• Handwheel: Ductile Iron
• Wheel Nut: Carbon Steel

The combination of these materials helps the valve achieve high durability, corrosion resistance, and stable sealing performance.

5. Technical specifications of KITZ 10SJBF / 10SJ globe valve

Working pressure

JIS 10K

Size range

From 1/4 inch to 3 inch for threaded connection and 10 mm to 80 mm for flanged connection.

Connection type

• 10SJ: Threaded connection (Screwed Ends)
• 10SJBF: Flanged connection (Flanged Ends)

Working temperature

Suitable for water, steam, and oil environments within the temperature limits of the material design.

6. Differences between 10SJBF and 10SJ valves

These two valve types have similar structures but differ in the connection type.

10SJ valve

• Threaded connection
• Suitable for small pipelines
• Quick installation

10SJBF valve

• Flanged connection
• Higher sealing capability and durability
• Suitable for large industrial systems

7. Applications of KITZ globe valves in industrial systems

KITZ ductile iron globe valves are widely used in many industrial fields, including:

• Water supply systems
• Steam systems
• Oil and gas systems
• HVAC systems
• Chemical plants
• Manufacturing and processing plants

Thanks to the capability of precise flow regulation and high sealing performance, globe valves are a common choice for systems requiring stable flow control.

8. Advantages of KITZ ductile iron globe valves

The use of KITZ globe valves provides many benefits:

• Good flow regulation capability
• High sealing performance, reducing leakage risk
• Durable and corrosion-resistant materials
• Long operating service life
• Suitable for many industrial environments

9. Guide for selecting the appropriate globe valve

When selecting a globe valve for a system, the following factors should be considered:

• System working pressure
• Fluid temperature
• Type of fluid (water, steam, oil, chemicals)
• Pipeline connection type
• Pipeline size

Selecting the correct valve type will help the system operate safely, stably, and more efficiently.

10. Conclusion

The ductile iron globe valves KITZ 10SJBF and 10SJ are effective flow control solutions for industrial piping systems. With robust design, high-quality materials, and stable sealing capability, this valve series can meet operational requirements in many industrial fields.