Rexroth Series | Main Relief Valve | Hydraulic Overflow Control Valve Compatible with Rexroth

1. Product Overview & Wholesale Price Range

Rexroth Series Main Relief Valve is the key pressure‑control spare‑part for hydraulic main circuit. It undertakes overflow pressure limiting and over‑pressure protection for the whole hydraulic system. Common replacement scenarios include insufficient hydraulic power, system pressure swing, internal leakage, spool scratch and abnormal high‑pressure failure.

• Factory Wholesale Price: $148 – $218 USD Direct factory price for hydraulic repair workshops
• Material Specifications: High‑strength alloy steel valve body, precision‑ground spool assembly, outstanding pressure‑resistance and sealing performance, stable overflow pressure‑regulating output, long service life
• Fit Application: Main hydraulic circuit compatible with Rexroth series assemblies
• MOQ & Bulk Discount: 1 Unit, preferential quotation for bulk maintenance orders
• Lead Time: 1‑3 working days, sufficient stock supports worldwide logistics shipment
• Warranty: 12‑month replacement warranty, pressure‑resistance and sealing testing finished before shipment

2. Application Scope

This main relief valve is developed for Rexroth‑type hydraulic main‑loop maintenance & overhaul:

• Main Circuit Overhaul: Direct replacement for original damaged main relief valve assembly.
• Hydraulic Fault Repair: Solve insufficient hydraulic output power, pressure fluctuation, internal leakage and pressure‑loss faults.
• Repair Workshop Usage: Precise dimension matching, easy installation, stable overflow pressure‑limiting performance.
• Overseas Parts Reseller: Stable inventory, complete QC records to support cross‑border hydraulic component trading.

3. Common Main Relief Valve Failure Troubleshooting

• Fault 1: Insufficient Hydraulic Output Power
  Cause: Internal spool wear, pressure‑regulating spring fatigue, hydraulic oil impurity contamination.
  Solution: Install brand‑new main relief valve, flush hydraulic circuit and replace hydraulic filter element.
• Fault 2: Unstable Hydraulic System Pressure
  Cause: Spring damage, sealing surface abrasion, hydraulic pressure oscillation.
  Solution: Replace complete main relief valve assembly, inspect hydraulic oil cleanliness.
• Fault 3: Internal Leakage inside Main Relief Valve Assembly
  Cause: Spool scratch, seal aging, long‑term high‑pressure impact damage.
  Solution: Fit new main relief valve, inspect hydraulic pump and control valve internal wear condition.
• Fault 4: Abnormal Hydraulic System Noise
  Cause: Internal component fatigue, foreign particles trapped inside valve chamber.
  Solution: Replace full main relief valve assembly, clean the whole hydraulic oil loop.

4. Matching Hydraulic Spare Parts Recommendation

5. Frequently Asked Questions

Q1: How do I confirm this main relief valve matches my hydraulic assembly?
A: Verify your hydraulic unit belongs to Rexroth series, check valve dimension and thread specifications before placing orders.

Q2: What quality checks are performed before goods dispatch?
A: Each main relief valve undergoes pressure‑resistance and sealing performance testing before shipment.

Q3: What precautions should be taken during installation?
A: Clean mounting surface and oil ports thoroughly to avoid dirt entering valve body, test system overflow pressure after finishing installation.