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Products

Precision Hydraulic Components Engineered to Last

From Miniature Valves to Heavy-Duty Systems, we offer complete solutions for industrial & mobile applications.

Discover valves, pumps, power units & custom kits for key industries

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Energy-Efficient Power Transfer

High-Performance Gear Pumps

High-efficiency gear pumps cut energy costs by 40% while handling extreme temperatures ...
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Hard-Seated Reliability

Compact Hydraulic Power Systems

Compact mini power packs deliver strong energy in tight spaces with smart pressure control ...
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Safety You Can Trust

Instant Locking Safety Valves

Instant-lock safety valves stop accidents 3x faster than competitors during pressure drops, ...
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Chanllences

Solving Your 3 Biggest Hydraulic Issues

We fix your hydraulic headaches what others can’t:

Leaky & Weak Systems? 

Old-style rubber seals get worn by shaking and weather changes, which causes tiny gaps (thinner than paper!) that leak oil - enough to fill 2 bathtubs every year. Our no - leak valves & mini power packs keep full pressure.

Serving Clients in 50+ Countries

Old valves react slower than a blink. When lifting heavy loads, machines shake like a bumpy road. Our smart controls give smooth speed changes – even with heavy loads. Smart controls give smooth speed changes – even with heavy loads.

400+ Hydraulic Component Models Available

1 breakdown = 3 days lost work + $10,000+ repair bills. Auto - safety stops prevent damage. We remove air bubbles fast.
Beyond Standards, Beyond Expectations

Precision Manufacturing Excellence

Trusted by industry leaders including XCMG and SANY Heavy Industry

Cutting-Edge
R&D

30-member engineering team with 21 patented technologies

Full Product
Ecosystem

Complete hydraulic solutions from valves to gear pumps

Custom
Manufacturing

OEM/ODM supported with 15-day rapid prototyping

Quality
Assurance

0.02μm machining precision exceeding industry standards by 30%

Applications

Industries Our Hydraulic Machinery Serves

When you choose SJ solutions, you're getting advanced hydraulic machinery that integrates smart controls to power your construction equipment. Our hydraulic machinery delivers reliable performance for your agricultural systems, marine platforms, and mining operations where precision matters most.

[ Construction Machinery Hydraulics ]

Heavy-Duty Hydraulic Systems for
Tunnel Boring & Loaders

[ Smart Agriculture Solutions ]

Precision Hydraulics for
Tractors & Harvesters

[ Marine & Offshore Systems ]

Saltwater-Proof Hydraulics
for Ships & Rigs

[ Oilfield Hydraulic Innovations ]

Explosion-Proof Systems
for Extreme Extraction

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Precision Certified, Globally Trusted

Jiangsu Certified Hydraulic Solutions Leader

Jiangsu
Manufacturing Hub

Key supplier for 1/3 of China's tunnel boring machines

AAA Credit
Enterprise

Jiangsu AAA Credit Enterprise since 2018, partnering with SANY/XCMG for 8 years

CNAS Lab
Validations

ISO 10771-certified tests achieving β₃₀₀≥200 filtration ratio per ISO 16889

Global
Certifications

21 global certifications including CE (-30°C~+120°C) and GOST-R (-50°C~+85°C)
Reviews

Global Validation of Our Hydraulic Machinery

Our hydraulic machinery, which serves customers across six continents, earns praise for reliability that you can count on. Your peers who use our hydraulic machinery report 30% lower maintenance costs and fewer breakdowns than industry averages.
" In the industrial set - ups we're working with, SJ's proportional valves really did a great job. They managed to cut down hydraulic failures by 60% and maintenance costs by 45%. This is a huge deal and has made our whole operation a lot smoother. "

Emma Watson

Sales Manager, Xuzhou Construction Machinery Group Co., Ltd.
" Our customer's marine motors? They ran smoothly for 8,000 hours in the high - salinity environment of the South China Sea. And guess what? They actually outperformed the design specifications! "

John Smith

Sany Heavy Industry Co., Ltd.
" In our continuous mining operations, we've been quite pleased with SJ hydraulic pumps. They've run for over 10,000 hours without maintenance. This remarkable performance has notably increased our equipment availability rate by 30%. It has brought us great convenience and benefits, and we highly recommend their products. "

David Brown

Lovol Heavy Industry Co., Ltd.
 
FAQ

How Can We Help?

Our experienced team is ready to answer your questions about hydraulic machinery selection, maintenance, and performance to help you find the perfect solution for your specific needs.
Hydraulic Fundamentals Maintenance & Troubleshooting Component Innovations

How to choose hydraulic valves for different construction machinery?

Learn to select directional/flow/pressure valves for excavators and cranes based on flow rates (15-400 LPM) and DL series pressure compensation tech.

What factors affect gear pump lifespan? How to extend it?

Key factors: oil cleanliness (NAS 7), load management. Maintain CBN gear pumps with 500-hour checks.

Why do hydraulic systems overheat? 3 most common causes

Overheating causes: oil viscosity issues, poor cooling, excessive loads. Diagnose with temperature and pressure checks.

How to fix leaking hydraulic cylinders? Step-by-step solutions

Fix leaks with seal replacement (O-ring pre-compression) and chrome-plated piston rod repairs.

5-minute troubleshooting guide for low hydraulic pressure?

Quick fixes: check oil level, motor direction, relief valve. Use flow meters for pump tests.

When to replace hydraulic oil? A practical contamination checklist

Replace oil when contamination exceeds ISO 4406 standards. Monitor particles, water, viscosity. Use Shengjie’s oil test kits.

How do smart valves save 15-22% fuel? Real data revealed?

Smart valves cut fuel use by 15-22% via PID algorithms. Try our ROI calculator for savings estimates.

Lightweight gear pumps: Why aluminum handles 20MPa pressure?

Nano-treated aluminum gear pumps withstand 20MPa, 37% lighter. Proven in 100,000 pressure tests.