Electric Ball Valve: The Ultimate FAQ Guide

Electric Ball Valve: The Ultimate FAQ Guide

Before investing in a new electric ball valve, you should read this guide.

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It has all the information that will help you choose the best electric ball valve in the market.

Keep reading to learn more.

What is an Electric Ball Valve?

An electric ball valve is an automatic quarter-turn valve that uses gear trains and motors to control flow. The gear train and motor system will open the valve when the ball’s hole is in line with fluid flow.

It will also automatically close when pivoted at 90 degrees by the valve handle.

How Does an Electric Ball Valve Work?

Electric ball valves convert electrical energy into rotary force using an electric motor, thus turning ball valves. It is the most efficient mode of controlling valves due to the clean electric energy and quiet operation.

Step One: Powering Up the System

First, switch on the electric ball valves to allow proper flow of electric current through the system. The electric current powers the motor, generating torque transmitted by a shaft connected to the valve stem. The ball valve begins to rotate due to the shaft and motor's action. The amount of power needed varies: 12V, 24V, and 48V of DC or 24V, 48V, 120V, 130V, and 240V of AC.

Step Two: Controlling the Torque

As power flows through the motor, you can control the force it generates to rotate the ball valve. Different gears help control the shaft, producing different levels of force. The speed at which the electric ball valve operates is inversely proportional to its torque.

What is the Difference between Pneumatic and Electric Ball Valves?

You can choose either an electric or pneumatic ball valve. Here is a comparison between them:

Power Source

The driving force is the main difference. Pneumatic ball valves require air pressure between 60 to 125 PSI, while electric ball valves rely on DC and AC voltage.

Component Size

Electric ball valves are generally larger than pneumatic ones. For example, double-acting pneumatic ball valves are 70% smaller than electric ball valves.

Speed

Pneumatic ball valves open and close in 0.5 to 1 second. Electric ball valves are slower, taking 6 to 25 seconds.

Temperature

Pneumatic ball valves operate in temperatures from -20 to 350 degrees Fahrenheit. Electric ball valves have a narrower range, operating between 40 to 150 degrees Fahrenheit due to overheating risks.

Longevity and Durability

Pneumatic ball valves are more durable, cycling up to 1,000,000 times, compared to 250,000 for electric ball valves.

NEMA Ratings

Pneumatic valves are explosion-proof, while electric ball valves have higher safety standards due to numerous NEMA ratings.

Spring Return

Pneumatic valves have a spring return function, enhancing safety. This feature is not commonly implemented in electric ball valves.

Cost

Electric ball valves are more expensive than pneumatic ones. However, pneumatic valves often provide higher value despite the lower cost.

Advantages of the Electric Ball Valve

There are numerous benefits to using an electric ball valve:

Easy to Operate

You can easily control it from the control panel. It does not require compressed air, simplifying operations.

Low Cost of Operation

The automatic nature reduces the need for operators, lowering costs to electricity and maintenance.

Minimal Noise

Electric ball valves are quiet, making for a peaceful working environment.

Flexible Motion Control

Automatic and flexible motion control allows for easy speed adjustments via motor and gears.

Slower Cycle Time

Electric ball valves have slower cycle times, enhancing efficiency and output compared to pneumatic valves.

Cons of the Electric Ball Valve

Despite the benefits, there are a few disadvantages:

Limited Fail-Safe Options

Fail-safe options are few, increasing potential risks if the valve fails.

Expensive to Acquire

High automation levels make electric ball valves costly. However, they save money in operations.

Slower Cycle Time

Slower cycle times can be seen as a disadvantage compared to pneumatic valves.

How to Select the Right Electric Ball Valve

Consider OEM specifications and other factors when choosing an electric ball valve:

Power Source

Decide between alternating current (AC) or direct current (DC) based on your needs.

Size Matters

Dimensions should match application specifications. Larger applications require greater dimensions.

Type of Materials

Consider the materials used, typically stainless steel, to fit your application needs.

Applications of Electric Ball Valves

Electric ball valves are used in various applications including:

• Food Service Equipment
• Irrigation Industry
• Vehicle Wash Systems
• Water Treatment Equipment
• Manufacturing Facilities
• Mobile Applications
• Heat Exchangers

Combining Electric Ball Valve and Electric Actuator

Yes, they can work together. It’s best to buy them as a complete package for compatibility. They can create a remote-controlled automatic system via a connection interface.

Difference Between Electric Gate Valve and Electric Ball Valve

Electric ball valves and gate valves are commonly used. Electric ball valves use current, motors, and gears to control flow, turning the valve at various angles. Electric gate valves use similar technology but control by lifting and dropping a gate.

Use of Electric Ball Valve

The primary use is to control the flow of gases and liquids, part of a fluid transport system to allow or block fluid flow through pipes. They can open at various angles controlled remotely via the control panel.

Causes of Electric Ball Valve Failure

Several factors can lead to failure:

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Poor Design

Poor design can lead to incompatibility with application requirements, resulting in failure.

Faulty Installation

Poor installation can cause leakages or improper positioning, leading to failure.

Improper Operations

Using the valve for incorrect operations can also lead to failure.

How to Install the Electric Ball Valve

Follow these steps for successful installation:

Step One: Piping System

Install in a dry, sheltered location. Ensure pipes are cool and clean. Use thread sealant and proper fittings to connect pipes and valves.

Step Two: Positioning the Electric Ball Valve

Secure the valve with proper fittings, using a wrench to avoid stress. The valve and actuator should face upwards with minimal deviation. Wire the valve according to guidelines and test its functionality.

Materials Used in Electric Ball Valves

The primary material is stainless steel, specifically 316 S.S, used for the body and ball. Seats are made from PTFE with Viton O-rings, and enclosures are made from thermoplastic IP65.

Cost of Electric Ball Valves

Electric ball valves are more expensive, typically ranging from 25 to 150 USD depending on the size.

Size Limitations

No size limitations exist; choose according to application specifications, with custom sizes available.

Electric Ball Valve vs. Floating Ball Valve

Electric ball valves use current, motors, and gears for control, allowing remote control via a panel. Floating ball valves use floating ball technology to stop fluid flow under pressure.

Quality Testing for Electric Ball Valves

Manufacturers must test functionality and strength under high pressure, ensuring they open and close without interruption. Faulty units must be reconfigured before packaging and distribution.

Quality Standards for Electric Ball Valves

Ensure conformity to standards like API, ASME, EN, TS, ISO, and SIL certifications.

Voltage Rating of Electric Ball Valves

Voltage ratings vary: DC (12V, 24V, 48V) and AC (24V, 48V, 120V, 130V, 240V).

How to Control Electric Ball Valves

Control the valve from the system control panel, which regulates electric flow to the motor and gears. Limit switches also manage electric current flow as the valve operates.

At Kinvalve, we design and manufacture the best electric ball valves. Whether you need OEM support or custom electric ball valves at competitive prices, Kinvalve offers the perfect solution for you. Contact us now for all your electric ball valve needs.