How to Select the Right Motorized Ball Valve

Selecting the appropriate motorized ball valve indeed involves numerous technical parameters. Understanding several core elements is essential to identify the most suitable motorized ball valve product for the specific field conditions.

 

 

 

 

 

 

Core Selection Criteria for Electric Ball Valves

1. Field operating parameters

Medium temperature and working pressure: Select valve material and sealing material based on the medium's temperature, corrosiveness, and working pressure.

Pipe connection methods and diameter: Common connection methods for pipes and ball valves include flanges and threads, with thread types such as BSP, NPT, and G threads. The diameter of the electric ball valve must also match the pipe.

2. Control Methods

On/Off-type motorized ball valve: Requires only open/close control.

Modulating-type motorized ball valve: Requires precise flow control, achieved by adjusting the valve angle via 4-20mA or 0-10V analog signals.

Actuation Time and Safety: Determine the required actuation time based on site conditions. Specify whether the motorized valve should automatically reset during emergency power failure.

3. Valve Materials and Structure

Valve Body Structure: Different valve body structures can be selected based on working pressure. Floating ball valves are suitable for medium to low pressures, while fixed ball valves are suitable for high pressures.

Material Selection: Valve bodies for motorized ball valves commonly use stainless steel, brass, PVC, carbon steel, etc. Seals typically use PTFE, PPL, etc.

4.Parameters of the electric actuator:

Voltage: Determined by the supply available in the operating conditions, such as DC12V, DC24V, AC110V, AC120V, AC220V.

Protection rating: In humid or dusty operating conditions, an IP65 or higher protection rating is required.

5.Customisation capabilities and after-sales service

Tianjin Jinfeng Valve Co., Ltd. provides OEM and ODM services with enhanced reliability and technical support. Our motorised ball valves offer a switching lifespan of up to 100,000 cycles and come with a one-year warranty.

 

Critical Details

1.Sealing Surface Selection: Ensures the sealing integrity of motorised ball valves, serving as the key to preventing leakage.

Soft Seals (PTFE): Offer high sealing grades but cannot withstand excessively high temperatures. Suitable for water treatment, irrigation, and similar applications.

Hard Seals (Metal Seals): Provide lower sealing grades than soft seals but exhibit high-temperature resistance and wear resistance. Suitable for high-temperature media such as steam.

2.Nominal Diameter Requirements and Flow Control

Nominal Diameter Requirements: The nominal diameter of the motorised valve must correspond to the pipeline diameter. For applications requiring pipeline cleaning, a full-bore motorised ball valve may be selected. To control costs, a reduced-bore motorised ball valve may be chosen.

Angular Modulation: Where the application requires the motorised valve to possess flow control capability beyond mere on/off functionality, an electric actuator with modulation capability is necessary.

 

If you have carefully read the above article, I trust you now possess a fundamental understanding of how to select the correct motorised ball valve.

You may follow these four steps to clarify the selection process for motorised ball valves:

1. Specify the medium parameters

This forms the basis for selecting an electric ball valve. First, understand the medium's temperature, working pressure, whether it is corrosive, and whether it contains impurities.

2. Selecting the Control Method

Determine whether the valve is required for full opening/closing or precise flow regulation. This dictates choosing either a lower-cost on/off electric ball valve or a modulating electric ball valve with angular adjustment capability.

3. Determining Valve Material

Choose the valve material based on the size, pressure, and how corrosive the fluid is. You can select from a stainless steel motorised ball valve, a brass motorised ball valve, or a PVC motorised ball valve.

4. Actuator Specifications

Power Supply: Is it DC or AC? What voltage is required?

Operating Environment: Is the installation environment for the motorised valve damp or dusty?

Installation Environment: Is the installation space for the motorised valve ample? If installation space is limited, only compact actuators with threaded or wafer-type connections may be selected. If installation space is generous, flanged connections may be chosen.

This comprehensive guide will assist you in selecting the most suitable ball valve for your requirements. Should your application present unique challenges, please share the operational conditions with me, and I shall provide valuable recommendations and analysis.