Hydraulic Valves & Hydraulic Valve Manufacturers

Hydraulic valves are parts that control the flow and pressure of hydraulic fluid within a system. They allow hydraulic equipment to function properly and safely while allowing for precise control. Hydraulic valves are made up of a main casing, which is the outer enclosure that holds all the other components. The other components are a bonnet, or a removable section of the casing, a seat, which is the interior surface where the connection is made, and a disc that acts as the seal that prevents leaking at the seat.

Hydraulics valves are varied in terms of how they operate and what they do when functioning. For example, electric hydraulic valves are computer controlled and do not require an operator because they can be remotely controlled and operated. Hydraulic solenoid valves are also electrically operated devices. Hydraulic proportional valves are called proportional because the output flow is not equal to the input flow. Hydraulic manifolds are composed of a variety of hydraulic valves that are connected to each other within the hydraulic system. The shape of hydraulic valves also affects performance and usage. Hydraulic needle valves have small ports with thin threaded plungers that allow for tight flow regulation in hydraulic systems. Hydraulic ball valves are used in critical high pressure applications that require a quick and easy shutoff because the handle is manually rotated 90° between the open and close positions. Other common hydraulic valves include cartridge valves, check valves, directional control valves, control valves and relief valves. The size of hydraulic valves can range from less than an inch to a foot long; the average valve can fit in the palm of a hand. Common materials include brass, bronze, copper, cast iron and stainless steel as well as plastics such as PVC.

Some Leading Manufacturers

Fulflo Specialties, Inc.

Blanchester, OH | 937-783-2411

For more than 100 years, Fulflo Specialties has been manufacturing and supplying high quality hydraulic valves. We make all kinds of valves, but we specialize in hydraulic by-pass relief valves. We are devoted to quality, so every valve component is manufactured and assembled in our factory and made in the USA. Check out our exceptional offering of hydraulic valve solutions by visiting our website or call us to discuss your applications!

Metro Hydraulic Jack Co.

Newark, NJ | 800-633-8234

Here at Metro Hydraulic Jack, we are committed to supplying high quality hydraulic valves. We provide all kinds of valves, including directional control valves, in-line valves, 2-way valves, 3-way valves, and 4-way valves. We’ve been in the industry for more than 70 years, so you can trust us to provide expertise and exceptional service. Check out our full offering of hydraulic products on our website or give us a call!

FluiDyne Fluid Power

Fraser, MI | 800-842-5377

FluiDyne Fluid Power is your source for all of your hydraulic equipment and component needs. With unsurpassed quality, competitive prices, and personal service, we are one of the best and most experienced hydraulic valve suppliers in the industry. Our fluid power specialists are ready to assist you in finding and supplying the perfect solution for your applications! Check out our website or give us a call to learn more!

Kilgore Manufacturing

Columbia City, IN | 260-248-2002

Since 1980, Kilgore Manufacturing has been a leading source of machined components and assemblies for the mining, automotive, medical, electrical, military, and many other industries. We manufacture and supply all kinds of custom components, including hydraulic valves, and with our diverse range of machining capabilities, we can customize a valve to satisfy your unique requirements. Contact us today to see how we can serve you!


Addison, IL | 888-786-7723

As a fluid power specialist, SunSource has the hydraulic components and products you need! We offer a diverse range of valves, pumps, filtration systems, and more to meet your industrial hydraulic component needs. Whether you need to rebuild your hydraulic components or are looking for a brand new hydraulic valve, we have you covered! We exist to provide solutions for your needs, so give us a call or visit us online!

Zemarc Corporation

Los Angeles, CA | 323-721-5598

At Zemarc Corporation, we specialize in distributing top of the line hydraulic technologies. Whether it is for aerospace or agricultural applications, our hydraulic valves and other hydraulic components are designed and manufactured to stand up to your most demanding applications. With over 40 years of experience, you can count on us to supply superior quality, reliability, and performance! Call us or visit our website for more information!

Basic hydraulic valves have two stations: open and closed. When closed, no fluid is able to pass through but when open, it flows freely. Hydraulic valves are used within a fluid control system as a simple way to prevent improper levels of pressure and fluid. They are used with hydraulic tools or equipment such as water cutting machines or backhoes. Hydraulic valves are predominately used in equipment and tools founds in industrial, manufacturing or construction applications and are found in the aerospace, automobile, military, food processing, process control, oil or fuel, wastewater, irrigation, gas or air, steam, fire service, cryogenic, refrigeration, chemical and laboratory or medical industries. Which type of hydraulic valve is used in what type of industry completely depends on what each individual valve is intentionally produced to do. For example, electric hydraulic valves are found in underground piping and fluid control systems because they are a simple way to manage pressure and fluid levels. Though the flow rates are low, needle valves provide a steady and precise flow of fluid and are therefore used for calibration or flow regulating applications.

Some valves shut off flow when flow rates get too high, while others transmit signals to other valves in order to provide a systematic balance of flow. These valves protect hydraulic systems from being exposed to high pressures that exceed the mechanism’s specified limits. The solenoid converts electrical energy into mechanical energy. When the wire coil receives a current, a magnetic field acts upon the plunger, which results in opening or closing of the valve. Hydraulic check valves have two openings: an inlet in which the fluid enters and an outlet through which the fluid exits. They prevent backflow. Hydraulic directional control valves permit flow in more than one direction because they have a component that shifts or rotates to line up with the corresponding pipes or tubes and accommodate a number of ports. Hydraulic control valves prevent improper levels of pressure and fluid in hydraulic systems. Hydraulic relief valves are used to limit the pressure in a hydraulic system by allowing the pressurized hydraulic fluid to flow out of the system into an auxiliary passage. Protecting the passage of the substance as well as the environment through which it is passing is the overall goal of hydraulic valves, as well as protecting the substance and its source.

Hydraulic valves have an important place within everyday life. Without the ability to control the flow rate and pressure of fluids within a hydraulic system, many processes would become unsafe and ineffective. Hydraulic lines have existed for many years but were not initially utilized for many applications. Rather, they were kept in science labs and inventors tinkered with them. In modern times, however, hydraulic lines are widely used, making hydraulic valves very important. Innovations have resulted in a variety of valves that enable complex movements and precise control over fluids. The development and production of electronically controlled hydraulic valves has led to heavy duty equipment capable of lifting large loads as well as complex systems of tubes and lines leading to actuators that perform important manufacturing processes. Valves are even now used in vehicles to control the flow of fluids. These devices can be smaller than the tip of a pencil which is especially useful for environments where space is at a premium. The shrinking size of valves allows them to be used in places where they could not have fit before. When they are added to these hydraulic systems, the lines become safe and more effectively controlled. They are also available in large sizes to fit lines with big diameters, offering the same benefits.

Fulflo Specialties, Inc.

Hydraulic Relief ValvesHydraulic Valves – Fulflo Specialties, Inc.