language

BLOG

Specializing in the research, development, production, sales, equipment consulting, maintenance, and accessory services of heat exchange technology, equipment, and systems

Category >

Company Blog

Industry Blog

2018

Common issues with pressure regulating valves

Author:

Summary:

What are the characteristics and functions of a pressure-regulating valve? Answer: A pressure-regulating valve is used for automatic pressure regulation in heat exchange station systems. When there is excess water in the system and the working pressure exceeds the set pressure value, the pressure-regulating valve can automatically discharge water to the outside of the system. In the past, safety valves were used for pressure regulation, but it was gradually discovered during use that ordinary safety valves produce difficult-to-overcome noise due to resistance in the discharge pipe, the valve stem does not seal properly, and they cannot direct overflow water to higher places. Additionally, the difference in opening and closing pressure leads to unstable system pressure regulation, which is why they have been completely phased out. Safety valves with sealing caps that have appeared on the market can be used, and for large systems, holding pressure valves can be selected. Heat exchangers are in the first station system.

What are the characteristics and functions of a pressure-regulating valve?

　　Answer: The pressure-regulating valve is used for automatic pressure regulation in heat exchange station systems. When the system has excess water and the working pressure exceeds the set pressure, the pressure-regulating valve can automatically discharge water to the outside of the system.

　　In the early days, safety valves were used for pressure regulation, but it was gradually found that ordinary safety valves produce difficult-to-overcome noise when there is resistance in the outlet pipe, the valve stem does not seal, and it cannot direct overflow water to higher places. Additionally, the difference in opening and closing pressure leads to unstable system pressure regulation, which is why they have been completely phased out.

　　 Safety valves with sealing caps that have appeared on the market can be used, and for large systems, holding pressure valves can be selected.

How is the pneumatic heater applied in the primary station system?

　　Answer: A high-temperature water heating method has begun to be adopted in many regions. The design supply and return water temperatures selected domestically are generally 115 °C and 75 °C, while the actual operating temperatures are usually lower than the design values. The design water temperature for the secondary network is 95 °C to 70 °C, and the actual operating temperature is also relatively low. There are generally two methods for providing high-temperature water: one is provided by a water boiler, and the other is provided by a steam-water heat exchange station. The 'SP40' type pneumatic heater can achieve a supply and return water temperature difference of 40 °C, which can meet the parameters required for the primary station, but the water quality issue during condensate recovery has not yet been well resolved. To achieve condensate recovery, the pneumatic heater can first raise the water temperature by 40 °C, and then exchange it through a plate heat exchanger to become 115 °C water, allowing the condensate to be sent directly back to the boiler.

What is the function of a flexible joint?

　　Answer: The purpose of installing a flexible joint is to reduce the rigidity of the system, prevent resonance between the equipment and the system, isolate equipment noise from propagating into the system, and compensate for the thermal expansion of the piping system.

Control measures and causes of cracks in heat exchanger tube openings

Methods and formulas for selecting and calculating plate heat exchangers

:Next

Control measures and causes of cracks in heat exchanger tube openings

Methods and formulas for selecting and calculating plate heat exchangers

Heat Exchanger Standards

2025-09-17

Heat exchange equipment solutions

Chongqing Southwest Saiwei Heat Exchange Equipment Co., Ltd. is committed to providing customers with excellent heat exchange equipment solutions. With the rapid development of the industrial field, the demand and application of heat exchange equipment are becoming more and more extensive. The company deeply knows that each customer's needs are unique, so customized solutions have become our core competitiveness.

2025-08-13

Which heat exchanger is good?

2025-07-22

Heat exchanger material and corrosion resistance

2025-07-08

Which heat exchanger is good?

2025-06-27

Chongqing Southwest Saiwei Heat Exchange Equipment Co., Ltd. boosts the take-off of China's heat exchange technology.

2025-05-30

Contact Information

Telephone:

Customer service hotline:

+86-23-63521288

+86-23-63521388

+8613500387128

Address:

Baishiyi, Jiulongpo District, Chongqing

E-mail:

cqb@saiwell.com

Quick Connect

Home
About Us
Products
Production Equipment
Case s
Service & Support
Blog
Contact Us

Chongqing Southwest Saiwell Heat Exchange Equipment Co., Ltd.

Specializing in the research, development, production and sales, equipment consulting, maintenance, and accessory services of heat exchange technology, equipment, and systems, and undertaking the design and installation of thermal system engineering, energy conservation and emission reduction, and energy conservation and emission reduction system engineering.

Business License

COOKIES

Our website uses cookies and similar technologies to personalize the advertising shown to you and to help you get the best experience on our website. For more information, see our Privacy & Cookie Policy

COOKIES

required

These cookies are necessary for basic functions such as payment. Standard cookies cannot be turned off and do not store any of your information.

analyze

These cookies collect information, such as how many people are using our site or which pages are popular, to help us improve the customer experience. Turning these cookies off will mean we can't collect information to improve your experience.

Feature

These cookies enable the website to provide enhanced functionality and personalization. They may be set by us or by third-party providers whose services we have added to our pages. If you do not allow these cookies, some or all of these services may not function properly.

advertise

These cookies help us understand what you are interested in so that we can show you relevant advertising on other websites. Turning these cookies off will mean we are unable to show you any personalized advertising.