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The engine valve for Caterpillar C7 excavators is manufactured from high-temperature alloys including 4Cr9Si2 and 21-4NWNb, with precise dimensions of 40mm diameter by 81mm length for intake valves and 43mm by 99mm for exhaust valves. Surface treatments include chroming and soft nitriding to enhance wear resistance, with a tolerance of ±0.02mm on critical sealing surfaces. These valves are designed for use in high-stress internal combustion environments found in mining, road machinery, and generator sets, operating under continuous loads up to 240 kW.
The valve stems and heads are made from specialized bar stock grades standard in heavy-duty diesel applications. The intake valve uses 4Cr9Si2, a chromium-silicon alloy known for thermal stability, while the exhaust valve employs 21-4NWNb, a niobium-stabilized variant offering superior creep resistance. Heat treatment follows a network continuous furnace process, followed by U-type quenching and 100% non-destructive flaw detection. These steps ensure consistent microstructure and fatigue life, aligning with typical industry practices for OEM-equivalent valve components.
These valves are primarily sourced by repair shops, heavy equipment distributors, and aftermarket manufacturers servicing Caterpillar C7 engines. Orders are typically fulfilled in batches of 50 units or more, with lead times of 20 to 30 days for production runs. Packaging is done in anti-corrosion paper with individual compartmentalized boxes. The supplier offers a 100,000 km or one-year warranty, contingent on proper installation and use within rated thermal and pressure parameters.
| Material (Intake) | 4Cr9Si2 |
| Material (Exhaust) | 21-4NWNb |
| Intake Valve Diameter | 40 mm |
| Intake Valve Length | 81 mm |
| Exhaust Valve Diameter | 43 mm |
| Exhaust Valve Length | 99 mm |
| Surface Treatment | Chroming and soft nitriding |
| Valve Seat Angle | 60° for intake, 45° for exhaust |
| Typical Tolerance on Stem Diameter | ±0.02 mm, standard for heavy-duty diesel valves |
| Typical Hardness Range (Valve Stem) | 40-48 HRC, standard for chromed valve stems in industrial engines |
Shijiazhuang Huacheng Automobile Accessories Co., Ltd. operates from Wuji County, Hebei Province, China, with a facility focused on precision engine components for off-highway machinery. The supplier holds ISO9001 and IATF16949 certifications, verified through third-party audit records. Their production includes CNC machining lines, continuous heat treatment furnaces, and automated surface treatment stations. There is no public data on company size, annual revenue, or client list; the listing confirms only technical capability and process controls.
The supplier does not claim to be an OEM manufacturer but positions itself as a specialist in replacement valves for Caterpillar C7 engines. Response metrics show no recorded response rate or average response time, indicating limited buyer communication infrastructure. They provide samples at customer expense and guarantee delivery within 30 days for batch orders. No claims are made regarding export history, overseas offices, or direct OEM partnerships.
| Business Type | Supplier |
| Year Established | Recently Joined |
| Employees | Contact Supplier |
| Annual Revenue | Contact Supplier |
| Main Products | View Products Tab |
| Major Markets | Global |
| Response Time | <4h |
| Response Rate | New Supplier |
Before placing an order, verify the material certification for each valve batch, particularly the alloy composition of 4Cr9Si2 and 21-4NWNb. Request a copy of the heat treatment log and surface treatment parameters. Confirm that the supplier performs 100% flaw detection and can provide batch-specific inspection reports. Avoid accepting valves without documented metallurgical traceability, as counterfeit or subgrade materials are common in this segment.
Lead time for production orders is typically 20 to 30 days, with no expedited option stated. Incoterms are not specified in the listing; buyers must confirm whether FOB Qingdao or CIF applies. Payment terms are not disclosed - request a clear policy on advance deposit, LC terms, or T/T schedule. Packaging should include anti-rust paper and individual boxes; confirm the container loading plan to prevent damage during transit.
On receipt, conduct a visual inspection for surface defects, chroming uniformity, and stem straightness. Use a micrometer to verify diameter tolerances at three points along the stem. Perform a seating test with a valve spring tester to check lift and spring rate compliance. Request a sample batch for engine installation testing under load before committing to large orders. Retain documentation for warranty claims, including batch numbers and inspection records.
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Importing Excavator Parts Engine Va requires careful attention to shipping logistics, customs compliance, and secure payment terms. Common shipping options include Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. Buyers should verify import duties in their destination country. Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P).
The current listed wholesale price for Excavator Parts Engine Valve from Shijiazhuang Huacheng Automobile Accessories Co., Ltd. is $1/Bags on FOB terms from China. Prices may vary depending on order volume, packaging, and destination. For the most accurate bulk quote, send a direct RFQ to Shijiazhuang Huacheng Automobile Accessories Co., Ltd. through EximNext.
The supplier, Shijiazhuang Huacheng Automobile Accessories Co., Ltd., has set a Minimum Order Quantity (MOQ) of 1 Bags for Excavator Parts Engine Va. For sample requests or smaller trial orders, contact the supplier directly through our platform's inquiry system.
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Yes, Shijiazhuang Huacheng Automobile Accessories Co., Ltd. is a verified supplier on EximNext. You can view their complete company profile, business registration details, certifications, and export history before placing a bulk order.
For a complete technical data sheet or Certificate of Analysis (COA), send an inquiry directly to Shijiazhuang Huacheng Automobile Accessories Co., Ltd. through EximNext.
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Shijiazhuang Huacheng Automobile Accessories Co., Ltd. maintains international quality certifications. These ensure that the Excavator Parts Engine Va meets international quality, safety, and regulatory standards required for cross-border trade.
Click "Request Quotation" on this product page, specify your required quantity, preferred shipping terms, and destination country. Shijiazhuang Huacheng Automobile Accessories Co., Ltd. will respond with a detailed wholesale quote including FOB pricing, lead time, and payment options.
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