7000 Series - Double Acting, Spring-Return, Quarter Turn, Hydraulic Valve Actuator

Product Brand: Nu-Torque

Piston-Helix ball nut hydraulic spring-return actuator. 500-10000 in. lbs.

Piston-Helix ball nut hydraulic spring-return actuator. 500-10000 in. lbs.

Piston-Helix hydraulic actuators use hydraulic fluid under pressure to move a piston up and down, which drives a ball bearing ball nut that translates the up and down motion of the piston into a rotary quarter-turn motion.

Double acting, hydraulically driven OPEN and CLOSED as well as single-acting, Spring return to CLOSED.


This spring-return hydraulic actuator is designed to meet heavy-duty marine applications.

Hydraulic Valve Actuator: Functionality

Hydraulic valve actuators use liquid pressure to apply force and convert it into mechanical power to move the valve actuator. Hydraulic systems typically have pistons inside rather than a diaphragm, and the lubricating oil helps overcome the friction associated with piston actuators. 

Most pressures used in a hydraulic actuator ranges between 1,000 to 5,000 pounds per square inch (psi). Our 7000 series model is capable of up to 10,000 pounds of pressure. 

A hydraulic valve actuator can be known as single-acting when the fluid pressure is applied to just one side of the piston. The actuator can create extreme pressure along with very stable positioning too. When the fluid inside is stressed, the hydraulic cylinder allows the actuator to hold firm and be locked into place. 
Overall, hydraulic actuators provide the maximum power density you can get from any actuator. 

Hydraulic valve actuator advantages

Hydraulic valve actuators are a popular choice for many. While they come with many advantages, the most attractive is that they require little energy but exert considerable force.

Other advantages include:

  • Produces very high forces and speeds
  • Hydraulic actuators are rugged and suit high-force applications.
  • Operate in pressures of up to 4,000 psi
  • Hydraulic actuators can hold a constant force without the pump supplying more fluid
  • Remote pumps and motors with minimal loss of power
  • Explosion-proof, shock-proof, and spark-proof


What does a hydraulic actuator do?

A hydraulic actuator features a cylinder or fluid motor that uses pressure hydraulic power to encourage mechanical operation. The energy is converted into either linear, rotary, or oscillatory motion dependent on the components and their application. A hydraulic actuator exerts incredible force, as liquids are nearly impossible to compress. 

Where is a hydraulic actuator used?

Hydraulic actuators play an important role in many applications when you convert fluid pressure into motion. Some of the more popular ones include:

  • Winches and crane drives
  • Conveyor and feeder drives
  • Mixer and agitator drives
  • Roll mills
  • Drum drives for digesters
  • Clamping
  • Presses
  • Welding
  • Aircraft systems - wheel brakes, retractable landing gear, and constant-speed propellers
  • Wheel motors for military vehicles
  • Seld-driven cranes
  • Excavators
  • Trommels and kilns
  • Cable and general garbage
  • Trench cutters
  • Lawn trimmers
  • Tires
  • Drilling rigs

Hydraulic actuators are used in these applications as they have a wide selection of advantages, one being they can help the operator undertake mechanical tasks with little energy. In addition, they offer a large amount of power without taking up too much weight or space in the application. 

What is the difference between an actuator and a valve?

The difference between an actuator and a valve lies in how it is powered and its intent. A valve intends to regulate the flow of hydraulic or pneumatic pressure but not create motion. In contrast, an actuator move things, powered by electric, hydraulic, or pneumatic power. 

7000 Series - Double Acting, Spring-Return, Quarter Turn, Hydraulic Valve Actuator
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