HVOF Coated Throttle Valve Stem | China Suppliers & Factory for Oilfield Wear Resistance 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
- 🚢 Sea Freight
- 🚛 Land & Rail Transportation
Frequently Asked Questions (FAQ)
Q
What surface treatment is applied to the HVOF coated choke valve stem?
The valve stem surface is treated using High-Velocity Oxygen Fuel (HVOF) supersonic spraying technology. Available coating materials include cobalt-bonded tungsten carbide (WC/Co), WC/CoCr, Stellite alloys, Cr₃C₂/NiCr, nickel-based alloys (Ni60/Ni55), and WC/Ni. Coating thickness ranges from 0.03 to 0.5mm and can be customized to meet specific operating requirements.
Q
What working pressure ratings are available for the choke valve stem?
The choke valve stem is available in multiple working pressure grades: 2000psi (2K), 3000psi (3K), 5000psi (5K), 10000psi (10K), 15000psi (15K), and 20000psi (20K), covering standard, high-pressure, and ultra-high-pressure application scenarios in oilfield operations.
Q
Can the choke valve stem be customized according to specific drawings or samples?
Yes. Full OEM/ODM customization services are supported. Customers can provide drawings, samples, or equipment model information. Materials, dimensions, coating types, and connection structures can all be tailored to match specific valve brands and operating conditions, both domestic and international.
Q
What materials are used for the base of the choke valve stem?
The base material options include oilfield-specific alloy steels and stainless steels such as 40CrNiMoA, 42CrMo, 304/316/316L stainless steel, and 17-4PH precipitation-hardened stainless steel. All base materials are forged and processed through CNC precision turning and grinding to ensure high mechanical performance.
Q
In what environments can the HVOF coated choke valve stem be used?
The valve stem is designed for harsh oilfield environments including onshore oilfields, offshore drilling platforms, and oil and gas gathering systems. It performs reliably in sand-containing oil and gas media, acid and alkali corrosive fluids, and conditions with alternating high and low temperatures (-46°C to +121°C) and high-pressure impacts up to 20,000 psi.
Q
How is the choke valve stem packaged for export, and what shipping methods are available?
Each valve stem is packed in a rust-preventive protective bag as inner packaging, then placed in a fumigation-free plywood case or export carton. The packaging is shock-resistant, moisture-proof, and corrosion-resistant to ensure safe delivery. Available shipping methods include sea freight and land/rail transportation to meet various international logistics requirements.