China HVOF Coated Throttle Valve Stem for Oilfield Wear Resistance - Reliable Suppliers and Factory 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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1High-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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2Supersonic 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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3Precision 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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4Stable 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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5Flexible 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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6Factory 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
Meets international export standards for safe overseas delivery.
Inner Packing
Rust-preventive protective bag to prevent oxidation and corrosion.
Outer Packing
Fumigation-free plywood case or carton — shock-resistant, moisture-proof and corrosion-resistant, ensuring safe delivery by sea.
Product Transportation
Frequently Asked Questions (FAQ)
Q
What is the maximum working pressure this choke valve stem can handle?
The choke valve stem is available in multiple pressure grades, ranging from 2,000 psi (2K) up to 20,000 psi (20K), covering standard, high-pressure, and ultra-high-pressure applications to suit various oilfield and wellhead equipment requirements.
Q
What surface coating technology is applied, and what are its advantages?
The valve stem uses High-Velocity Oxygen Fuel (HVOF) supersonic spraying to apply wear-resistant alloy coatings such as WC/Co, WC/CoCr, Stellite, and Ni-based alloys. This results in a coating with porosity below 1%, hardness up to HRC75, and bonding strength ≥70MPa — delivering exceptional wear resistance, erosion resistance, and corrosion resistance that extends service life by 3–5 times versus untreated stems.
Q
Can the valve stem be customized to match our specific equipment drawings or samples?
Yes. Full OEM/ODM customization is supported. Customers can provide drawings, samples, or equipment model specifications, and the valve stem will be manufactured to match the required dimensions (80mm–600mm length), nominal diameter, material grade, coating type, and connection structure.
Q
What base materials are available, and which is recommended for corrosive media?
Available base materials include 40CrNiMoA, 42CrMo, 304/316/316L stainless steel, and 17-4PH precipitation-hardened stainless steel. For highly corrosive media such as acid, alkali, or H₂S-containing environments, 316L stainless steel or 17-4PH combined with a NiCr or Cr₃C₂/NiCr HVOF coating is recommended.
Q
Is this valve stem compatible with international brand choke valves and regulating valves?
Yes. The valve stem is precision machined to high dimensional accuracy and is compatible with a wide range of domestic and international brand choke valves, wellhead regulating valves, and drilling equipment valve assemblies. Compatibility can be confirmed by providing the valve model or original part drawing.
Q
What are the packaging and shipping options for bulk orders?
Products are packed in rust-preventive protective bags as inner packaging, placed inside fumigation-free plywood cases or cartons for outer packaging. This ensures shock resistance, moisture protection, and corrosion prevention throughout transit. Shipping is available via sea freight and land/rail transportation to support international bulk orders.