JIUDING JOURNAL

Hydraulic Engineering Insights

Selection guides, product knowledge and buyer resources.

Featured / Selection Guides

Open, Closed and Tandem Centers: Choosing a Valve's Neutral Position

Choose the neutral flow paths before choosing the valve body or coil.

2 min read · 2026.09.28

75 articles

Product Knowledge

Hydraulic Pressure and Flow: Two Different Design Questions

2 min read · 2026.09.28

Product Comparisons

Relief Valve vs Pressure-Reducing Valve: Which Pressure Is Controlled?

2 min read · 2026.09.28

Maintenance & Troubleshooting

A Solenoid Valve Will Not Shift: Build a Diagnostic Record

2 min read · 2026.09.28

Application Guides

Hydraulic Clamping Circuits: Specify Force and Confirmation Separately

2 min read · 2026.09.28

Buyer Resources

Photographing a Hydraulic Component for an Accurate Replacement Inquiry

2 min read · 2026.09.28

Selection Guides

Sizing a Hydraulic Valve from Flow and Pressure Drop

2 min read · 2026.09.28

Product Knowledge

Reading P, T, A, B, X and Y on a Hydraulic Valve

2 min read · 2026.09.28

Product Comparisons

Pilot-Operated Check vs Counterbalance Valve for a Loaded Cylinder

2 min read · 2026.09.28

Maintenance & Troubleshooting

Cylinder Drift: What to Measure Before Replacing a Valve

2 min read · 2026.09.28

Application Guides

Machine-Tool Hydraulic Power Units: Review the Idle Cycle

2 min read · 2026.09.28

Buyer Resources

How to Read a Hydraulic Valve Quotation Beyond the Unit Price

2 min read · 2026.09.28

INSIGHTS

Hydraulic Engineering Insights

Practical guidance on product selection, applications, manufacturing and maintenance.

75 articlesPage 1 / 7

Selection Guides · 2026-09-28

Open, Closed and Tandem Centers: Choosing a Valve's Neutral Position

Choose the neutral flow paths before choosing the valve body or coil.

Read Article

Product Knowledge · 2026-09-28

Hydraulic Pressure and Flow: Two Different Design Questions

Pressure supports force; flow supports speed, subject to the complete circuit.

Read Article

Product Comparisons · 2026-09-28

Relief Valve vs Pressure-Reducing Valve: Which Pressure Is Controlled?

Relief limits upstream pressure; reduction establishes a lower-pressure branch.

Read Article

Maintenance & Troubleshooting · 2026-09-28

A Solenoid Valve Will Not Shift: Build a Diagnostic Record

Diagnose the command, actuator and hydraulic circuit separately before replacing parts.

Read Article

Application Guides · 2026-09-28

Hydraulic Clamping Circuits: Specify Force and Confirmation Separately

Clamping force and confirmation of a correctly clamped workpiece are distinct requirements.

Read Article

Buyer Resources · 2026-09-28

Photographing a Hydraulic Component for an Accurate Replacement Inquiry

Clear identity photos plus a circuit description are more useful than many similar product shots.

Read Article

Selection Guides · 2026-09-28

Sizing a Hydraulic Valve from Flow and Pressure Drop

Select from the actual flow paths and their losses, not port size alone.

Read Article

Product Knowledge · 2026-09-28

Reading P, T, A, B, X and Y on a Hydraulic Valve

Port letters are a starting point; the exact symbol and drawing are authoritative.

Read Article

Product Comparisons · 2026-09-28

Pilot-Operated Check vs Counterbalance Valve for a Loaded Cylinder

A device that holds a load is not automatically a device that lowers it smoothly.

Read Article

Maintenance & Troubleshooting · 2026-09-28

Cylinder Drift: What to Measure Before Replacing a Valve

A repeatable drift measurement is more useful than a guess about which valve leaks.

Read Article

Application Guides · 2026-09-28

Machine-Tool Hydraulic Power Units: Review the Idle Cycle

Evaluate standby behavior alongside peak working demand.

Read Article

Buyer Resources · 2026-09-28

How to Read a Hydraulic Valve Quotation Beyond the Unit Price

Compare equivalent technical and delivery scopes before comparing price.

Read Article