Name: China Parker SE20 Series Two-stage Servo Valve Suppliers - Yanhui Hydraulic
Brand: Yanhui
SKU: 305303415

Guangdong Yanhui Hydraulic Co., Ltd. is one of the leading manufacturers and suppliers of parker se20 series two-stage servo valve in China. We warmly welcome you to wholesale bulk parker se20 series two-stage servo valve for sale here from our factory. If you have any enquiry about pricelist and quotation, please feel free to email us.

Product Overview

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The Parker SE20 Series is a high-performance, two-stage electrohydraulic servo valve designed for applications that require precise control of flow and pressure. It bridges the gap between complex electronic control systems and powerful hydraulic machinery. By converting low-power electrical signals into highly accurate, proportional hydraulic outputs, the SE20 series ensures your machinery operates with maximum accuracy and predictability.

Key Advantages

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High Dynamics: Delivers exceptionally fast response times, making it ideal for high-frequency closed-loop control systems.
Robust Design: Built with a durable feedback mechanism and dirt-resistant pilot stage, ensuring a long operational lifespan even in harsh industrial environments.
Precise Resolution: Offers minuscule hysteresis and high repeatability, meaning it executes the exact same movement perfectly every time.
Energy Efficient: Optimized internal flow paths reduce energy losses and heat generation within the hydraulic system.

Technical Specifications

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Parameter	Specification Details
Valve Design	2-Stage, Spool & Sleeve with Mechanical Feedback
Mounting Pattern	ISO 10372 / Standard Industrial Footprint
Maximum Operating Pressure	Up to 315 bar (4500 PSI)
Rated Flow Options (at $\Delta p$ 70 bar)	4 to 60 L/min (1 to 16 GPM)
Fluid Temperature Range	-20°C to +80°C (-4°F to +176°F)
Viscosity Range	15 to 380 $\text{mm}^2/\text{s}$ (cSt)
Hysteresis	< 1.0% to 2.0% of rated signal
Response Time ($100\%$ step)	Approx. 10 to 20 milliseconds (depending on size)

Applications

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Industry	Application	Why the SE20 is Used
Flight & Driving Simulation	Motion Base Actuators	Delivers smooth, instant reality-replicating movements without lag.
Plastics Machinery	Injection Molding Controls	Ensures exact wall thickness and uniform pressure during plastic molding.
Testing & Simulation	Structural Fatigue Test Rigs	Capable of vibrating and stressing components at high frequencies for millions of cycles.
Metal Processing	Steel Mill Roll Gap Control	Maintains perfectly uniform thickness in steel sheets rolling out at high speeds.
Power Generation	Steam Turbine Governor Valves	Precisely controls fuel/steam valves to maintain constant generator speeds.

Related Models

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Model Number Series	Rated Flow (at 70 bar)	Pilot Stage Type	Typical Application Focus
SE20-A04...	4 L/min	Standard Torque Motor	Ultra-precise micro-positioning
SE20-B10...	10 L/min	High Dynamics	High-speed testing rigs
SE20-C20...	20 L/min	Standard Torque Motor	General industrial automation
SE20-D40...	40 L/min	Heavy-Duty	Plastic injection molding clamps
SE20-E60...	60 L/min	High Flow	Heavy metallurgy and press control

FAQ

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Q1: What type of hydraulic fluid filtration is required for the SE20 series?

A: Servo valves have incredibly tight internal clearances. The SE20 series requires very clean fluid to prevent clogging. It is highly recommended to use a filtration system that maintains a cleanliness level of ISO 4406 17/14/11 or better. A high-pressure filter should always be placed right before the valve inlet.

Q2: What is the difference between a proportional valve and the SE20 servo valve?

A: While both control flow proportionally, a proportional valve is generally used for simpler, slower tasks. The SE20 servo valve uses a specialized internal torque motor and mechanical feedback wire, allowing it to react much faster and with significantly higher accuracy (lower hysteresis) than a standard proportional valve.