HVOF Coated Throttle Valve Stem for Oilfield Wear Resistance - China Suppliers Factory OEM Solutions
Product Description
The choke valve stem is a core moving component in oil drilling, oil and gas extraction, and wellhead throttling equipment, controlling flow, regulating pressure, and cutting off the medium. It is primarily used in conjunction with oilfield choke valves, regulating valves, and gate valves. The product uses high-strength alloy structural steel/stainless steel specifically designed for oilfields as its base material, formed through multiple precision machining processes including forging, CNC precision turning, and grinding.
The surface is reinforced with a wear-resistant alloy using high-velocity oxygen fuel (HVOF) spraying, providing exceptional wear resistance, erosion resistance, acid and alkali corrosion resistance, and high-pressure resistance. It can operate stably for extended periods in harsh oilfield conditions, including sand-containing oil and gas media, alternating high and low temperatures, and high-pressure impacts, effectively reducing equipment wear, extending replacement cycles, and lowering on-site maintenance costs.
The product adheres to industry-standard precision, ensuring high dimensional accuracy and smooth assembly. Customization based on drawings and samples is supported, making it a preferred component for oil machinery parts and wellhead equipment maintenance and replacement.
Product Specifications
| Type | Choke Valve Stem |
| Nominal Diameter | 1-13/16" / 2-1/16" / 2-9/16" / 3-1/16" / 3-1/8" / 4-1/16" / 5-1/8" / 6-5/8" / 7-1/16" / 9" / 11" / 13-5/8" Customization based on drawings/samples supported |
| Working Pressure | 2000psi (2K) / 3000psi (3K) / 5000psi (5K) / 10000psi (10K) / 15000psi (15K) / 20000psi (20K) (standard, high pressure, ultra-high pressure grades) |
| Length | 80mm – 600mm (non-standard lengths customizable) |
| Media | Crude oil, natural gas, oilfield wastewater, sand-containing media, acid and alkali corrosive media |
| Material | 40CrNiMoA, 42CrMo, 304/316/316L Stainless Steel, 17-4PH and other oilfield-specific materials |
| Working Temperature | -46℃ ~ +121℃ |
| Hardness | HRC75 |
| Bonding Strength | ≥70MPa |
| Porosity | <1% |
| Surface Treatment | Supersonic spraying of cobalt-bonded tungsten carbide (WC/Co) / cobalt-chromium-bonded tungsten carbide (WC/CoCr) / cobalt-chromium tungsten alloy (Stellite 20#/NiCr) / nickel-chromium-bonded chromium carbide (Cr₃C₂/NiCr) / nickel-based alloy (Ni60/Ni55) / nickel-based tungsten carbide (WC/Ni) |
| Coating Thickness | 0.03–0.5mm (Customizable) |
| Applicable Equipment | Oilfield throttle valves, wellhead regulating valves, drilling equipment, wellhead valves |
| Customization Services | Support OEM/ODM, processing based on drawings, material customization, coating customization |
Product Features
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1. High-Quality Base Material, Reliable Strength
Utilizing oilfield-grade alloy steel/stainless steel forged base material, it boasts high tensile strength and excellent impact toughness. It remains unbent, undeformed, and unbreakable under long-term high-pressure conditions, exhibiting operational stability far exceeding that of valve stems made from ordinary materials.
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2. Supersonic Spraying, Superior Protection
The surface features an HVOF supersonic sprayed alloy coating with strong adhesion and high density. It offers outstanding wear resistance, erosion resistance, acid and alkali resistance, and anti-cavitation performance, extending the service life of valve stems by 3–5 times compared to ordinary ones, significantly reducing downtime and replacement frequency.
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3. Precision Machining, Strong Adaptability
Precision machined on CNC lathes and cylindrical grinders, it achieves high dimensional accuracy and excellent coaxiality, perfectly fitting the valve seat, seals, and valve body. This ensures excellent sealing, sensitive adjustment, and eliminates jamming and leakage.
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4. Stable Application in Harsh Conditions
Resistant to high and low temperatures, high pressure, and corrosion from oil and gas media, it is suitable for complex and harsh conditions such as onshore oilfields, offshore drilling platforms, and oil and gas gathering and transportation systems. It offers strong versatility and a low failure rate.
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5. Flexible Customization and Complete Support
Materials, dimensions, coatings, and connection structures can be customized according to customer drawings, equipment models, and operating conditions. Compatible with various domestic and international brands of choke valves and regulating valves for maintenance and new equipment.
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6. Factory Direct Supply and High Cost-Effectiveness
Produced directly from the source factory, with mature technology, stable quality, and strong bulk supply capabilities. Compared to purchasing imported parts, costs are lower, and delivery cycles are shorter, making it suitable for long-term cooperation and bulk purchases.
Product Packaging
- Standard Export Packaging
- Inner packing: Rust-preventive protective bag
- Outer packing: Fumigation-free plywood case or carton
- Shock-resistant, moisture-proof and corrosion-resistant, ensuring safe delivery by sea.
Product Transportation
Logistics & Transportation
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Sea Freight
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Land & Rail Transportation
Frequently Asked Questions
What materials are available for the HVOF coated choke valve stem?
The valve stem base materials include 40CrNiMoA, 42CrMo, 304/316/316L stainless steel, 17-4PH, and other oilfield-specific alloys. Surface coatings can be selected from WC/Co, WC/CoCr, Stellite 20#/NiCr, Cr₃C₂/NiCr, Ni60/Ni55, and WC/Ni depending on the operating environment and requirements.
What working pressure ratings does the choke valve stem support?
The valve stem is available in multiple pressure grades: 2000psi (2K), 3000psi (3K), 5000psi (5K), 10000psi (10K), 15000psi (15K), and 20000psi (20K), covering standard, high-pressure, and ultra-high-pressure applications.
Can the valve stem be customized to match our existing equipment drawings?
Yes. Full OEM/ODM customization is supported. Customers can provide drawings or samples for reference. Dimensions (length 80mm–600mm and beyond), nominal diameter, coating type, coating thickness, and connection structure can all be tailored to specific equipment models and operating conditions.
How does HVOF spraying improve the service life of the valve stem?
HVOF (High-Velocity Oxygen Fuel) spraying produces a dense, strongly bonded alloy coating with porosity below 1% and hardness up to HRC75. This dramatically improves wear resistance, erosion resistance, and corrosion resistance, extending valve stem service life by 3–5 times compared to uncoated or conventionally treated stems.
What are the applicable industries and equipment for this valve stem?
The choke valve stem is designed for oilfield throttle valves, wellhead regulating valves, drilling equipment, and wellhead gate valves. It is widely used in onshore oilfields, offshore drilling platforms, and oil and gas gathering and transportation systems, and is compatible with various domestic and international valve brands.
What packaging and shipping methods are used for export orders?
Products are packed with a rust-preventive protective bag as inner packaging and a fumigation-free plywood case or carton as outer packaging, ensuring shock resistance, moisture-proofing, and corrosion protection. Shipping is available via sea freight or land and rail transportation to meet different delivery requirements.