SV1 SV1-10 SV1-06 SV1-16 SV2-10/20 Servo Valve SV1-10/8/120/1 SV1-10/48/315/6 SV1-10-16-120-6

SV1: The SV1 series is a two-stage jet tube type electro-hydraulic servo valve.

10: Rated flow rate. It indicates that at the specified valve port pressure drop (typically 7 MPa or 1000 psi), the rated flow rate of the valve is 10 liters per minute. This is the key parameter that determines the speed of the actuator.

8: Valve core function/type. The number “8” represents a valve core with zero opening/negative overlap. This design has almost no leakage at the median, high control accuracy and good linearity, and is a standard configuration for high-performance servo systems.

120: Coil impedance/Input signal. The impedance of the control coil representing the torque motor inside the valve is 120 ohms. This usually corresponds to a standard current drive signal, such as ±10 mA or ±40 mA.

1: Option code. Indicates specific optional functions or design variations. This may include:

Special sealing materials (such as fluororubber FKM or nitrile rubber NBR).

Additional sensors (such as valve core position feedback LVDT).

A specific form of plug connector.

Manufacturing version number.

Ii. Main Features

Advanced structure: It adopts a frictionless, hydraulically pressed turntable structure with good operational sensitivity.
Small zero drift: The temperature zero drift and pressure zero drift are very small, ensuring stable operation under different working conditions.
Long service life: Low leakage, large control distance, and due to structural features, it has a very long working life with almost no maintenance.
Online cleaning available: It is equipped with an online cleaning function, allowing for cleaning operations without disassembling the valve, which significantly reduces maintenance downtime.
Excellent material: The outer box is made of special aluminum alloy, which is light in weight, high in strength and has good anti-corrosion performance. The external screws are made of stainless steel.

Iii. Functions and Roles
The essence of a servo valve is an electro-hydraulic conversion amplifier and a precision hydraulic power output controller.

Electro-hydraulic conversion: It proportionally converts the weak electrical signal (milliampere-level current) from the controller into high-power hydraulic energy output (high pressure and large flow).

Precise control: By precisely controlling the flow and direction towards hydraulic actuating elements (cylinders or motors), continuous and precise closed-loop control of the position, speed, acceleration or output force of the actuating elements is achieved.

A simple metaphor: It is the “precise hands” of the hydraulic system, capable of meticulously controlling the hydraulic actuator to perform various complex and precise actions in accordance with the instructions of the electrical signal.
The SV1-10/8/120/1 servo valve is a key component in the hydraulic control system. It can accept analog electrical signals and precisely control the flow and direction of the oil to achieve accurate control of hydraulic actuating elements, such as controlling the extension and retraction speed and position of hydraulic cylinders and the rotational speed of hydraulic motors, thereby meeting the requirements of various industrial equipment for high-precision and high-responsiveness control.
Iv. Usage Scenarios
The SV1 series servo valves are widely used in industrial fields with high requirements for control accuracy and dynamic response, especially:

Metallurgical industry

Rolling mill: Thickness control (AGC) of strip, plate shape control, and roll gap positioning.

Straightening machine: Precise adjustment of the roller gap.

Coiler: Tension control.

Metal Forming and pressing machine

Injection and mold closing control for injection molding machines and die-casting machines.

Synchronization and position control of large presses.

Test equipment

Fatigue testing machines and material testing machines are used to achieve precise control of load and displacement waveforms.

Heavy Industry and Energy

Turbine guide vane control, turbine speed regulation system.

Large radar and antenna drive systems.

V. Common Models of the SV1 Series
The SV1 series forms multiple models by changing parameters such as flow rate, valve core, and coil. Common model variants include:

Model example, rated flow (L/min), valve core type, coil impedance (Ω), characteristics and applications
Sv1-10/8/120/10 Zero opening (8) 120 small flow rate, suitable for medium and small-sized actuators
SV1-20/8/120/1 20 Zero opening (8) 120 medium flow rate, widely applied
Sv1-40/8/80/40 Zero opening (8) 80 large flow rate, suitable for applications requiring greater speed or power
Sv1-60/8/80/1/60 Zero opening (8) 80 larger flow rate, suitable for large equipment
Sv1-10/6/120/10 Positive opening/negative overlap (6) 120 valve cores have different functions and are used for specific control characteristics
SV1-20/8/280/1 20 zero-opening (8) 280 high-impedance coil, which may correspond to voltage drive

The models of the SV1 series include SV1-10/16/315/6, SV1-10/4/100/6, SV1-06/05/210/5, SV1-10/48/315/6, SV1-10/8/100/6, SV1-10/32/315/6, SV1-10/8/315/6, SV1-10/16/1 00/6, SV1-10/32/100/6, etc.