Product Details

Product Overview

This high-quality DB58 Diesel Main Relief Control Valve is a critical component engineered specifically for Doosan engine systems. Designed to regulate and maintain optimal hydraulic pressure within the engine’s lubrication circuit, this valve ensures the reliable performance and longevity of heavy-duty excavators and industrial machinery. As a specialized B2B supplier, we offer global shipping with fast delivery to major industrial hubs across North America, Europe, Asia-Pacific, the Middle East, and South America. Our inventory supports both aftermarket replacements and OEM-equivalent requirements for international clients.

Key Features & Benefits

• Precision Engineered: Manufactured to exact OEM specifications for a perfect fit and seamless integration with Doosan DB58 engine systems.
• Superior Durability: Constructed from high-grade steel and hardened alloys to withstand extreme pressures and high-temperature operating conditions common in excavator applications.
• Enhanced System Protection: Prevents over-pressurization in the main lubrication circuit, reducing the risk of seal failure, bearing damage, and costly engine downtime.
• Consistent Performance: Features a precision-ground spool and calibrated spring mechanism for stable pressure relief and consistent hydraulic flow control.
• Rigorous Testing: Each valve undergoes individual pressure calibration and leak testing to ensure 100% functionality upon installation.

Technical Specifications

OEM Cross-Reference

This Main Relief Control Valve is designed to directly replace or serve as an aftermarket equivalent for the following original equipment manufacturer (OEM) part numbers:

• Doosan / Daewoo: DB58-21110, 65.05501-0016
• Hyundai: 11Q1-15130 (Cross-Reference for DB58 applications)
• Alternative Numbers: 30021-23001, 65.05501-5016

Note: Please verify your existing part number against the list above to ensure compatibility before ordering.

Compatibility

• Engine Models: Doosan DB58, DB58T, DB58TI (Tier 2 & Tier 3 equivalents)
• Vehicle/Equipment Applications:
  • Doosan Solar 220LC-V, 225LC-V, 300LC-V Excavators
  • Daewoo DH220, DH225, DH300 Excavator Series
  • Hyundai R220LC-9, R225LC-9 Excavators (with DB58 engine)
  • Industrial generators and heavy machinery utilizing the DB58 power unit
• Year Ranges: Compatible with models manufactured from the early 2000s up to current production runs (approx. 2002-Present), depending on specific engine serial number.

Global Supply & Distribution

We specialize in the global export of high-quality engine parts with a robust logistics network ensuring timely delivery. Our supply capabilities include:

• Worldwide Shipping: Reliable air freight (DHL, FedEx, UPS) and sea freight (FCL/LCL) options to any major port or airport.
• Major Markets Served: North America (USA, Canada, Mexico), Europe (Germany, UK, Netherlands, Poland), Asia-Pacific (China, Singapore, Australia, Indonesia), Middle East (UAE, Saudi Arabia, Qatar), and South America (Brazil, Chile, Peru).
• Fast Delivery: Standard stock items shipped within 24-48 hours. Express delivery to major industrial centers (e.g., Houston, Rotterdam, Dubai, Shanghai) in 5-7 business days.
• Export Expertise: Experienced in international trade documentation, customs clearance, and compliance with import regulations for all target markets.

Quality Assurance

• Manufacturing Standards: Produced in ISO 9001:2015 certified facilities, ensuring consistent quality control and traceability.
• Warranty: All valves are backed by a comprehensive 12-month warranty against manufacturing defects and premature failure under normal operating conditions.
• Testing Procedures: 100% functional testing includes pressure calibration, flow rate verification, and leak testing using calibrated equipment to match OEM performance curves.

FAQ

Q1: Will this Main Relief Control Valve fit my Doosan DB58 engine if my original part number is different from the ones listed?

A: The primary fitment is for the DB58 engine series. However, we recommend physically comparing your removed valve’s mounting pattern, thread size, and overall dimensions against the photos provided. If your part number is not listed in the cross-reference (e.g., 65.05501-0016), please contact our technical support team with your engine serial number for verification. Many valves have slight variations based on the specific pump or block configuration.

Q2: What is the recommended installation procedure for this valve?

A: Installation is straightforward. First, relieve all system pressure and drain the engine oil. Remove the old valve, taking care not to damage the mounting threads. Clean the mounting surface thoroughly. Apply a small amount of clean engine oil to the new O-ring or gasket (if applicable) and the valve threads. Torque the new valve to the manufacturer’s specification (typically 35-45 Nm for this size). Refill the oil, start the engine, and check for leaks immediately. We recommend replacing the O-ring seal with a new one during installation.

Q3: How often should the Main Relief Control Valve be inspected or replaced?

A: While the valve is a durable component, it should be inspected during major engine overhauls or if you experience symptoms like low oil pressure, erratic hydraulic operation, or oil foaming. In severe operating conditions (high dust, continuous heavy load), we recommend inspection every 2,000 hours. Replacement is typically recommended during a full engine rebuild or if the valve fails a pressure test (e.g., opening pressure is more than 10% below spec). There is no standard replacement interval for this part alone.

Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.

2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.

3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.

4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.

5. Scientific ERP system, easy and fast to locate the parts that customer needs.

6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.

Exhibition

Packing&Shipping

1.  Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).

2.  Once we get confirmation of payment, we will ship products in 2 days.

3.  Our packaging is standard export wooden box or others as your requirement.

4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ

Q1. What is your company major products?

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.

Q2.What is the MOQ?

A: Normally we can supply any quantity if we have in stock.

Q3. What is your payment term ?

A: We accept Western Union, T/T, Paypal.

Q4. What is the packing ?

A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.

Q5. When can you deliver products after payment ?

A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .

Q6. What can you do to complete order perfectly ?

A: In the beginning , We will communicate with clients in details to understand what they need .

Before packing , We will check the products and send photos to clients .After confirmation ,

We will packing products well to avoid damage . Once we get tracking number ,

We will send it to customer and keep contact in with clients .