Application of Cast Iron Gate Valves in a District Heating System

Background

District heating systems are essential infrastructure in modern cities, especially during winter, to ensure stable, safe, and efficient heating. A major district heating company serving 1.5 million square meters of building space required a reliable hot water circulation system. Due to the system's complexity and the high hardness of the water, strict requirements were set for valve sealing performance, corrosion resistance, wear resistance, and service life.

As a professional industrial valve manufacturer, YAXING VALVE provided a comprehensive solution with its high-performance cast iron gate valves, ensuring reliable and efficient operation of the heating system.

Requirements of Heating Systems for Valves

1. Excellent Sealing Performance: Valves must ensure zero leakage under high pressure to prevent hot water from escaping.

2. Corrosion Resistance: Valves must resist corrosion from dissolved oxygen and other substances in the hot water.

3. High Temperature and Pressure Resistance: The system operates at temperatures between 80°C and 120°C, with a pressure rating of up to 1.6 MPa.

4. Low Flow Resistance: Valves should have minimal flow resistance to improve system energy efficiency.

5. Ease of Maintenance: The system operates continuously during winter, so valves must be durable and easy to maintain, minimizing downtime.

YAXING VALVE's Solution: Cast Iron Gate Valves

To meet the heating system's requirements, YAXING VALVE provided specially designed cast iron gate valves for hot water circulation systems.

1. Product Features

• Premium Materials: The valve body is made of high-strength grey cast iron, while the wedge and stem are constructed from stainless steel for enhanced corrosion resistance.

• Superior Sealing: Equipped with resilient seated sealing technology, the sealing surface is made of EPDM rubber, offering excellent performance and durability under high temperatures and pressures.

• High-Temperature Resistance: The valves can operate continuously at up to 120°C and have passed rigorous high-temperature and high-pressure testing.

• Low Flow Resistance: The full-bore design ensures smooth flow, reducing energy consumption in the system.

2. Application Scenarios

• Heat Exchanger Stations: Used to distribute and control hot water, ensuring uniform heating.

• Main Circulation Pipelines: Regulates hot water flow for stable system operation.

• Branch Pipelines: Provides precise control for localized heating zones.

3. Implementation Process
   The YAXING VALVE engineering team conducted an on-site assessment, optimized the specifications of the cast iron gate valves based on operational parameters, and provided end-to-end support for installation and commissioning, ensuring rapid system deployment.

Results

1. Enhanced Operational Stability
   YAXING VALVE cast iron gate valves operated continuously for over 1,000 hours during the heating season without any sealing failures or blockages, significantly improving system reliability.

2. Energy Savings
   The low flow resistance design reduced the energy consumption of circulation pumps by approximately 10% compared to traditional valves.

3. Reduced Maintenance Frequency
   The cast iron gate valves demonstrated excellent corrosion and wear resistance in hard water conditions, minimizing maintenance requirements and lowering operating costs.

4. Improved User Satisfaction
   Heating system users reported more consistent heating performance with no interruptions caused by valve-related issues.

Customer Feedback

The district heating company's manager praised YAXING VALVE's products and services:

"YAXING VALVE's cast iron gate valves fully met our requirements, particularly their sealing performance and corrosion resistance, which ensured the long-term stability of our system. We look forward to future collaboration with YAXING VALVE."

Conclusion

As a leading industrial valve manufacturer, YAXING VALVE is committed to delivering high-quality and reliable valve solutions tailored to customer needs. This successful application of cast iron gate valves in a district heating system highlights YAXING VALVE's technical expertise and service excellence in the heating sector.

If you're looking for efficient and reliable valve solutions for your heating systems, contact YAXING VALVE today! We are dedicated to providing the best products and services to meet your needs.

Phone: +86 186 3170 8948

E-mail: info@civalves.com