# Balance Valve: Understanding the Structure and Principle

The hydraulic balancing valve enables the unrestricted flow of oil from port 2 to port 1, as evidenced by the schematic diagram at the top of the figure below. When the oil pressure at port 2 is higher than the pressure at port 1, the green part of the spool moves towards port 1 due […]

The hydraulic balancing valve enables the unrestricted flow of oil from port 2 to port 1, as evidenced by the schematic diagram at the top of the figure below.

When the oil pressure at port 2 is higher than the pressure at port 1, the green part of the spool moves towards port 1 due to the force of the oil pressure, causing the check valve to open and allowing oil to flow freely from port 2 to port 1.

However, the flow of liquid from port 1 to port 2 is blocked until the pressure at the pilot port reaches a certain level, causing the blue spool to move to the left and opening the valve port. This allows oil to flow from port 1 to port 2.

If the pilot pressure is not strong enough to open the blue spool, the valve port closes and the flow of fluid from valve port 1 to valve port 2 is shut off.

The symbol for the balancing valve is shown below:

## The role of the balance valve

The balancing valve helps to prevent the unintended downward movement of the hydraulic cylinder. This allows the operator to lift heavy objects at a specific speed and keep them in a fixed position.

The balancing valve prevents the actuator from moving before the hydraulic pump has had a chance to respond. This helps to eliminate cavitation of the actuator and reduce the risk of losing control of the load.

In the event of a line in the hydraulic system bursting or leaking severely, a balancing valve installed on the actuator helps to prevent the loss of control over the moving load.

## Selection principles for balancing valve application and pilot ratio

The typical relief setting for balancing valves is usually 1.3 times the maximum operating pressure. However, the pressure required to activate a pilot valve depends on the pilot ratio.

The pilot pressure can be calculated using the following formula:

Pilot Pressure = (Relief Pressure Set Point – Load Pressure) / Pilot Ratio

To optimize load control and energy efficiency, the pilot ratio can be selected based on the following guidelines:

• A 5:1 ratio is chosen when the load is highly unstable, such as in the case of long-arm cranes. This ratio is used when the load changes and has a significant impact on the mechanical structure.
• A 10:1 ratio is appropriate for applications where the load is relatively stable.
Don't forget, sharing is caring! : )
Author

#### Shane

##### Founder of MachineMFG

As the founder of MachineMFG, I have dedicated over a decade of my career to the metalworking industry. My extensive experience has allowed me to become an expert in the fields of sheet metal fabrication, machining, mechanical engineering, and machine tools for metals. I am constantly thinking, reading, and writing about these subjects, constantly striving to stay at the forefront of my field. Let my knowledge and expertise be an asset to your business.

#### Punching Force Calculator & Formula (Online & Free)

Have you ever wondered how to ensure a successful metal stamping project? In this blog post, we'll dive into the critical factors that can make or break your stamping process.…

#### Sheet Metal Gauge Thickness Chart (Steel, Aluminum, Brass)

Have you ever wondered what those numbers on sheet metal mean? In this article, we'll dive into the world of sheet metal gauge and demystify this essential aspect of metalworking.…

#### Electric vs Hydraulic Press Brake – Which One is Right for Your Business?

I. Introduction With the increasing development of technology, modern sheet metal processing, especially the bending process, requires higher and higher standards. There are different technical requirements for equipment and processing…

#### Laser Cutting Thickness and Speed Chart (500W-30kW)

Curious about the capabilities of laser cutting? In this comprehensive guide, we'll dive into the world of laser cutting speeds and thicknesses for various metals. Our expert mechanical engineer will…

#### Z Purlin Weight Calculator & Chart (Online & Free)

Have you ever wondered about the hidden world of Z-purlins? In this captivating article, our expert mechanical engineer will guide you through the intricacies of calculating Z-purlin weight. Discover how…

#### H Beam Sizes and Weight Chart

Have you ever wondered about the hidden world of H-beam steel? In this captivating article, we'll unravel the mysteries behind these essential construction components. Our expert mechanical engineer will guide…

#### Chequered Plate Weight Calculator (Online & Free)

Have you ever wondered about the weight of those patterned steel plates you see every day? In this blog post, we'll dive into the fascinating world of checkered steel plates.…

#### K Factor Calculator for Sheet Metal Bending (Online & FREE)

Are you struggling to design accurate sheet metal parts? Unlock the secrets of the K-factor, a crucial concept in sheet metal fabrication. In this article, our expert mechanical engineer demystifies…

#### I Beam Weight Chart, Sizes & Online Calculator

Have you ever wondered how to select the perfect I-beam for your construction or manufacturing project? In this blog post, our expert mechanical engineer will guide you through the process…

#### Copper vs. Aluminum Cables: A Comprehensive Comparison

I. Advantages of Copper Core Cables over Aluminum Core Cables: 1. Low resistivity: The resistivity of aluminum core cables is about 1.68 times higher than that of copper core cables.…

#### How to Choose the Right Safety Valve: A Step-by-Step Guide

Due to the diversity of safety valves and the diversity and complexity of pressure systems, when selecting a safety valve, the impact of factors such as temperature, pressure, and medium…

#### Safety Valve Usage Tips: Enhance Your System’s Security

The researcher conducted a project on a hotel’s hot water system, which provides full-time supply with steam (0.3Mpa) as the heat source, water supply temperature of 60-55 degrees, using a…
Take your business to the next level
Subscribe to our newsletter
The latest news, articles, and resources, sent to your inbox weekly.