EX55 Hitachi Excavator Control Valve Main Hydraulic Safety Valve 25 MPa Alloy Steel Replacement

Q: Can the set pressure of the main relief valve be adjusted on-site?

Yes, the main safety valve features an external adjustment screw for on-site pressure calibration. However, we strongly recommend using a calibrated pressure gauge and following the Hitachi service manual procedure. Improper adjustment may lead to hydraulic system damage or safety hazards.

Company Profile

YFM FK is a professional manufacturer and exporter of excavator hydraulic components with over 15 years of industry experience. Our factory is located in Guangzhou, Guangdong, China, covering an area of 8,000 square meters with advanced CNC machining centers, hydraulic test benches, and a dedicated quality control laboratory.

Production Capabilities

• CNC Machining: 20+ CNC turning and milling centers for precision manufacturing
• Hydraulic Testing: 5 dedicated test benches capable of testing up to 50 MPa
• Monthly Output: 10,000+ pieces across all product categories
• R&D Team: 8 engineers specializing in hydraulic system design and reverse engineering

Quality Control

• Certification: ISO 9001:2015 certified quality management system
• Incoming Inspection: 100% raw material hardness and composition verification
• In-Process Control: Real-time dimensional monitoring during CNC machining
• Final Testing: Every valve undergoes pressure calibration and leakage testing
• Traceability: Each product is laser-marked with a unique batch number

Main Export Markets

Our products are exported to 50+ countries across Southeast Asia, the Middle East, Africa, South America, and Eastern Europe. We serve construction equipment dealers, repair workshops, and OEM replacement parts distributors worldwide.

Q1: What is your minimum order quantity (MOQ)?

Our standard MOQ is 5 pieces per model. For trial orders or sample evaluation, we can accommodate smaller quantities. Please contact us with your specific requirements.

Q2: Can you provide samples for testing?

Yes, we offer sample orders for quality evaluation. Sample cost is charged at the regular unit price plus shipping. The sample fee can be deducted from your first bulk order.

Q3: What payment terms do you accept?

We accept T/T (bank transfer), L/C at sight, PayPal, and Western Union. For new customers, we recommend T/T with 30% deposit and 70% balance before shipment. Long-term partners may qualify for flexible payment terms.

Q4: What is your delivery time?

For in-stock items, we ship within 3-5 working days. For production orders, the lead time is 15-25 days depending on order quantity and customization requirements.

Q5: Do you offer warranty on your products?

Yes, all YFM FK hydraulic safety valves come with a 12-month warranty against manufacturing defects under normal operating conditions. We provide free replacement or repair for any warranted defects.

Q6: Can you customize products to specific requirements?

Absolutely. We offer OEM and ODM services. Our engineering team can customize pressure ratings, thread sizes, surface treatments, and packaging according to your specifications. Please provide your technical drawings or sample parts for reverse engineering.

Q7: How do you package products for export?

Each valve is individually packed in a foam-lined inner carton, then placed in an export-grade corrugated outer carton. Bulk orders are shipped on pallets with stretch wrap. We also offer custom branded packaging upon request.

Q8: What shipping methods are available?

We ship via sea freight (FCL/LCL), air freight, and international express (DHL, FedEx, UPS, TNT). Our logistics team will recommend the most cost-effective shipping solution based on your order volume and destination. We work with all major shipping lines and can ship on FOB, CIF, or EXW terms.