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

1. Product Overview & Wholesale Price Range

Rexroth Series Main Relief Valve is a core hydraulic pressure‑control spare‑part for hydraulic pump and main control assembly. It provides pressure limiting and over‑pressure protection for the whole hydraulic loop. Common replacement scenarios include hydraulic power shortage, pressure fluctuation, internal leakage, valve spool wear and abnormal pressure failure.

• Factory Wholesale Price: $152 – $225 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 pressure‑regulating output, long service life
• Fit Application: Hydraulic system 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 system maintenance & overhaul:

• Hydraulic Circuit Overhaul: Direct replacement for original damaged main relief valve assembly.
• Hydraulic Fault Repair: Resolve insufficient hydraulic power, pressure swing, internal leakage and pressure‑loss faults.
• Repair Workshop Usage: Precise dimension matching, easy installation, stable 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: Hydraulic Power Output Insufficient
  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 Relief Valve Assembly
  Cause: Spool scratch, seal aging, long‑term high‑pressure impact damage.
  Solution: Fit new main relief valve, check 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 can I confirm this main relief valve fits my hydraulic unit?
A: Verify your hydraulic assembly belongs to Rexroth series, check valve dimension and thread size for compatibility before ordering.

Q2: What quality inspection is carried out before shipment?
A: Each main relief valve passes pressure‑resistance and sealing performance testing before delivery.

Q3: What notes should be followed during installation?
A: Keep mounting surface and oil ports clean to prevent dirt entering valve interior, test hydraulic pressure performance after installation.