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Industrial Flow Control Servo Valves Replacing The 760 Series 550 Series
550 Series Servo Valves
Positioning: General-purpose high-end industrial precision servo valve, standard ISO 04 mounting surface, available in two versions: standard response and high response high frequency; Fully mechanically interchangeable with MG 550, G761, and the older 760; performance on par with MG 550, with superior wear resistance, lifespan, and contamination resistance compared to the original MG.
Core applications:
Materials mechanics fatigue testing machines, high-frequency vibration testing benches;
Precision closed-loop control for steel rolling, aluminum foil rolling, and injection molding;
Aerospace component testing, aerospace ground simulation equipment;
Electro-hydraulic speed control for steam turbines/gas turbines, wind power hydraulic tooling;
High-precision pressure/displacement closed-loop hydraulic systems.
1. Flow Specifications
(Calibrated with differential pressure ΔP = 70 bar)
2. Pressure Parameters:
Maximum continuous operating pressure: 315 bar (31.5 MPa)
Minimum pilot oil supply pressure: 14 bar
Pressure resistance test: Inlet 150% rated pressure, return port burst pressure 250%
Permissible return oil back pressure: ≤70 bar
3. Static control accuracy:
Hysteresis: ≤0.5%
Resolution: ≤0.05%
Temperature drift (40℃ temperature difference): Zero drift ≤1.5% FS
Median leakage (140bar oil supply): Low flow rate ≤1.7L/min; 40~75L/min ≤2.2L/min
4.Media and Environment:
Applicable Media: Mineral hydraulic oil, fire-resistant oil; Viscosity 10~100cSt
Temperature Range: -20℃ ~ +80℃; Fluororubber seals can be customized for 135℃ high-temperature applications
Protection Rating: IP65
Vibration Resistance: 30g impact vibration across the entire axial direction, superior to wind power operating standards
Valve Body Weight: Standard single valve 1.3kg
5.Electrical Specifications:
Drive Signal: ±15V bipolar differential analog control signal (standard servo amplifier compatible);
Coil Configuration: Single coil / dual redundant coil (triple coil optional), current specifications ±10mA/±40mA/±50mA/±200mA;
Plug Selection (fully compatible with MG aviation plugs)
Standard: MIL-C-5015 round aviation plug;
High-end Explosion-proof / Grade: MIL-DTL-38999 sealed connector, airtight plug;
Custom Explosion-proof: Intrinsically safe explosion-proof, flameproof type, covering chemical Zone 0/1/2 explosion-proof areas.
Sealing, Safety, and Customization Options
Sealing Materials:
NBR (Nitrile Butadiene Rubber) (Standard Mineral Oil);
FPM/ Fluororubber (Fire-resistant, High-Temperature, Chemical Media);
Valve Core Center Position Function:
Zero Opening (Standard, Closed-Loop High Precision);
Positive Cover/Negative Cover (Custom Open Center Circuit);
Safety Optional:
Power Failure Mechanical Center Position Return Spring (Compared to A076 Wind Power Valve);
Dual/Triple Redundant Coils, Single-Point Failure Does Not Cause Control Loss;
Built-in Micro-filter at Valve Inlet (with Blockage Signal);
Drawings & Dimensions
Standard Warranty: 12 months or 2,000 operating hours (whichever comes first).
Extended Warranty: Optional coverage up to 24 months.
Global Support: 24/7 technical assistance and spare parts supply.
Training: On-site or remote operation/maintenance training.
Changsha HaoBo Brothers Technology Co., Ltd
Changsha HaoBo Brothers Technology Co., Ltd. Was founded in 2015 and established by three like-minded mechanical engineers with backgrounds in the petrochemical, mining, and metallurgical industries. The company was created to address key industry challenges by delivering high-quality, cost-effective mechanical equipment and components through integrated engineering solutions, tailored to the specific needs of clients in the petrochemical, mining, and metallurgical sectors.
From 2015 to 2017, the company operated by supplying custom-engineered equipment (through outsourced manufacturing) alongside imported European and American spare parts, serving both domestic and international customers across the petrochemical, mining, plastics, and metallurgical industries.
In 2017, Changsha HaoBo Brothers Technology Co., Ltd. Invested in and established a joint-venture factory focused on manufacturing equipment and components for the metallurgical industry, as well as air compressors, large-scale pumps and valves, blowers, and related machinery for the petrochemical and mining sectors.
In 2022, the company further invested in another joint-venture factory dedicated to producing equipment and accessories for the plastics industry.
To date, the group's core business operations encompass the following:
With branch offices established in Germany and the United States, we source and supply European and American brand spare parts and equipment to clients in the petrochemical, mining, plastics, and metallurgical industries.
Through our joint-venture factories in China, we manufacture equipment and spare parts for the metallurgical, petrochemical, mining, and plastics industries.
We act as authorized distributors for select equipment from leading domestic manufacturers, supplying these products to clients in the metallurgical, petrochemical, metallurgy, and plastics industries.
Q: What's the lead time for orders?
A: Standard models ship in 15–30 days; customized models depend on the specific product.
Q: Do you provide after-sales service overseas?
A: Yes, we have partnered service centers in key regions.
Q: Can I request a customized valve size?
A: Absolutely! We offer tailored attachments.
Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).
Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.
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