What type of balancing valve is generally used in HVAC engineering?

It depends on your design system to decide which type to choose, so I will briefly explain the following balancing valves below, and then give you how to choose!

A balancing valve is a control device that enables the water system to achieve dynamic and static balance adjustment. It is divided into dynamic balancing valve and static balancing valve.

Static balancing valves are what we often call manual balancing valves, digital locking balancing valves, hydraulic balancing valves, etc. (this article is called hydraulic balancing valves).

Dynamic balancing valves are divided into dynamic flow balancing valves, dynamic differential pressure balancing valves, etc.; The dynamic flow balance valve is divided into fixed flow type and adjustable flow type.

The so-called constant flow type is also commonly referred to as the valve tank type, and the factory flow rate has been set and cannot be adjusted on site (that is, piston type).

The adjustable flow rate type can be adjusted and set on site.

Dynamic flow balancing valves are also known as self-operated flow control valves, self-operated balancing valves, constant flow valves, automatic balancing valves, etc. In October 2003, the relevant standards of the Ministry of Construction were promulgated and designated as self-operated flow control valves.

Dynamic differential pressure balancing valve is also known as self-operated differential pressure control valve, differential pressure controller, pressure stabilizing variable synchronizer, differential pressure balancing valve, etc.

The dynamic differential pressure balance valve is divided into constant differential pressure type and adjustable differential pressure type.

The constant differential pressure type has a controlled differential pressure set for the factory.

The adjustable differential pressure type is the size of the differential pressure that can be adjusted and controlled on the spot.

If your air conditioning system is:"Non-variable flow"(constant flow system) is recommended to use self-operated balancing valve, it is an intuitive and simple flow regulation control device, the application of self-operated flow control valve in the pipe network can be directly according to the design to set the flow, the valve can be under the action of water, automatically eliminate the flow deviation caused by the remaining pressure head and pressure fluctuations of the pipeline, no matter how the system pressure changes, keep the set flow unchanged, these functions of the valve make the flow adjustment of the pipe network complete at one time, turn the network adjustment work into a simple flow distribution, and effectively solve the hydraulic imbalance of the pipe network. Self-operated flow control valves are mainly used in water systems such as central heating (colding), so that the flow of the pipe network is distributed on demand, the hydraulic imbalance of the water system is eliminated, the problem of uneven cold and heat is solved, and energy saving and electricity saving are 15%-20%)

If your design system is a variable flow system (that is to say, a variable frequency flow system), do not choose a self-operated balance valve, because when the user independently adjusts the indoor temperature according to the requirements, when the self-operated flow control valve and the user needs to increase the flow rate behind the valve, the flow rate cannot be increased due to the limitation of the self-operated flow control valve; When the users behind the valve need to reduce the flow rate, the users will interfere with each other, and the self-operated flow control valve becomes a useless valve that can only consume the power of the pump. Therefore. For this type of system, it is recommended to use a dynamic balance electric control valve, which automatically adjusts the opening of the valve according to the change of the temperature control signal in the target area, thereby changing the water flow rate, and finally bringing the actual temperature of the target area to the set temperature.

What does SP45F-16 mean?

SPF (SP) is"Digital locking balancing valve series"of the label. S number, P balance, 45 dark rod open, F PTFE seal, 16 nominal pressure, that is, the maximum working pressure is below 16 kg)!

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only: Suzhou Neway Valve Co., Ltd., Shanghai Guanlong Valve Machinery, Shanghai Qizhong Valve Manufacturing, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

Dynamic balance electric two-way valve for air conditioner end, dynamic balance electric control valve for fresh air.

Summary. How to choose the size and model of the heating balance valve1 First calculate the cold (heat) load of the system; 2. Calculate the capacity of the equipment at the end of the system according to the load, and then calculate the water flow rate of the pipeline according to the temperature difference; 3.Determine the size of the pipe according to the flow rate, and then determine the resistance of the system according to the flow rate and pipe diameter; 4.

According to the total flow rate of the system and the resistance of the most unfavorable pipes. Determine the flow rate and head of the pump; 5.Select the remaining head for the remaining branches.

Select the flow rate and differential pressure of the balancing valve control system. 6。According to the actual maximum flow rate and pressure difference multiplied by a certain safety factor, the corresponding balance control valve is selected with reference to the parameters given by the sample (the corresponding flow rate in the sample should also be the maximum flow).

How to choose the size and model of the heating balance valve1 First calculate the cold (heat) load of the system; 2. Calculate the capacity of the equipment at the end of the system according to the negative envy load, and then calculate the water flow rate of the pipeline according to the temperature difference; 3.Determine the size of the pipe according to the flow rate, and then determine the resistance of the system according to the flow rate and pipe diameter; 4.According to the total flow rate of the system and the resistance of the most unfavorable pipes.

Determine the flow rate and head of the pump; 5.Select the remaining head for the remaining branches. Select the flow rate and differential pressure of the balancing valve control system.

6。According to the actual need of the maximum flow rate and pressure difference multiplied by a certain safety factor, refer to the parameters given by the sample to select the corresponding balance control Dan disorderly draft mold filial piety valve (the corresponding sample should also be the maximum flow).

The front and rear pipes are 65, and the balance valve is 50, does it have an impact?

The use of floor heating balance valve is relatively simple, generally speaking, reverse rotation can reach the maximum, and the balance valve can adjust the flow rate as long as the front and rear pilot pressure call pipe on the chaotic return to the needle valve can be adjusted. Static balancing valve is a kind of static hydraulic condition balancing valve, with an equal percentage of the flow characteristic curve, suitable for concentrated quantity adjustment, centralized quality regulation and phased change of flow rate of the world coarse regulation system, when the system flow changes, the installation of the digital lock balance valve of each branch, the flow rate of each user will increase or decrease proportionally, to maintain the flow distribution scheme at the beginning of the regulation.