Product Overview

This is a brand new, high-quality Overflow Pressure Limiting Valve (also known as a Return Screw) designed specifically for DENSO HP0 diesel injection pumps. As a critical component in the fuel injection system, it ensures precise pressure regulation within the pump, preventing over-pressurization and maintaining optimal engine performance. Sourced from a reliable manufacturer in Shandong, China, this part is available for global shipping and serves major markets including North America, Europe, Southeast Asia, and the Middle East. It is an ideal replacement for repairing worn or faulty pressure regulation components in heavy-duty diesel engines.

Key Features & Benefits

• Precision Engineering: Manufactured to standard OEM specifications for a perfect fit and reliable function in DENSO HP0 pump assemblies.
• Durable Material: Constructed from high-speed steel for exceptional wear resistance and long service life under high-pressure conditions.
• 100% Professional Tested: Every unit undergoes rigorous quality control to ensure consistent pressure regulation and leak-proof performance.
• Restores Pump Efficiency: Replacing a faulty overflow valve helps maintain correct fuel pressure, improving engine starting, idle stability, and overall fuel economy.
• Cost-Effective Solution: A direct replacement for OEM parts, offering significant savings compared to purchasing a complete pump assembly.

Technical Specifications

OEM Cross-Reference

This product is a direct replacement for the following OEM part numbers:

• DENSO: 090310-0280
• DENSO: 0903100280
• Isuzu / Other: 8-97603414-0

Compatible Pump Models: This valve is designed for use with the DENSO HP0 pump, specifically models including 094000-0480.

Compatibility

This overflow pressure limiting valve is specifically designed for use in diesel injection systems equipped with the DENSO HP0 common rail pump. It is commonly used in heavy-duty commercial vehicles, construction machinery, and agricultural equipment. While it is a standard component for many diesel car applications, it is most frequently utilized in:

• Isuzu diesel engines (e.g., 4HK1, 6HK1 series)
• Hino diesel engines
• Other industrial diesel engines utilizing the DENSO HP0 pump platform.

Please verify your pump model (e.g., 094000-0480) to ensure compatibility before purchase.

Global Supply & Distribution

We are committed to providing fast and reliable global shipping for B2B customers. Our distribution network ensures efficient delivery to major industrial centers worldwide.

• Major Markets Served: North America (USA, Canada, Mexico), Europe (Germany, UK, France, Netherlands), Asia-Pacific (Japan, South Korea, Australia, Singapore), Middle East (UAE, Saudi Arabia), and South America (Brazil, Argentina).
• Shipping Capabilities: We offer flexible shipping options including express couriers (DHL, FedEx, UPS) and air/sea freight for bulk orders.
• Fast Delivery: Standard delivery time is 3-7 days after payment confirmation for in-stock items.
• Export Expertise: Our team has extensive experience in international trade, ensuring smooth customs clearance and compliance with global trade regulations.

Quality Assurance

• Manufacturing Standards: Produced in ISO-compliant facilities, focusing on precision and durability.
• Testing: Each valve undergoes 100% professional testing for pressure calibration and leak integrity before shipment.
• Warranty: We offer a 6-month warranty against manufacturing defects, providing peace of mind for your procurement.

FAQ

Q1: How do I know if this overflow valve fits my DENSO HP0 pump?

A: This valve is a standard fitment for the DENSO HP0 pump series. Please check the model number on your pump’s data plate. It is specifically compatible with pump model 094000-0480 and uses the OEM number 090310-0280. If your pump is a DENSO HP0 model, this part is highly likely to be compatible, but verifying the pump model number is the best practice.

Q2: What are the symptoms of a failing overflow pressure limiting valve?

A: Common symptoms include hard starting, unstable idle, black smoke from the exhaust (due to over-fueling), a noticeable drop in engine power, and fuel pressure faults in the ECU. If you experience these issues and suspect a fuel pressure problem, checking and replacing the overflow valve is a standard diagnostic step.

Q3: What is the installation process for this return screw?

A: Installation is straightforward but requires mechanical experience. First, relieve the fuel pressure in the system. Locate the overflow valve on the top or side of the HP0 pump. Remove the old valve using a suitable socket or wrench. Clean the mounting surface and install the new valve, tightening it to the manufacturer’s specified torque (typically 20-30 Nm). It is recommended to replace the copper washer if included. After installation, prime the system and check for leaks.