High-Quality HVOF Coated Throttle Valve Stem for Oilfield Wear Resistance - China Suppliers & Factory
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
-
🔩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.
-
🛡️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.
-
⚙️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.
-
🌡️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.
-
🔧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.
-
🏭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
Rust-preventive protective bag (inner packing) with fumigation-free plywood case or carton (outer packing). Shock-resistant, moisture-proof and corrosion-resistant, ensuring safe delivery by sea.
🧴
Inner Packing
Rust-preventive protective bag to protect the product surface from oxidation and moisture during transit.
🪵
Outer Packing
Fumigation-free plywood case or carton — fully compliant with international export standards for sea freight shipments.
Product Transportation
Logistics & Transportation
- 🚢 Sea Freight
- 🚛 Land & Rail Transportation
Frequently Asked Questions (FAQ)
❓What is an HVOF coated choke valve stem used for?
The HVOF coated choke valve stem is a core moving component used in oilfield choke valves, wellhead regulating valves, and gate valves. It controls flow, regulates pressure, and cuts off media in oil drilling, oil and gas extraction, and wellhead throttling equipment.
❓What surface treatment is applied to the valve stem?
The valve stem surface is treated using high-velocity oxygen fuel (HVOF) supersonic spraying technology. Coating materials include cobalt-bonded tungsten carbide (WC/Co), cobalt-chromium-bonded tungsten carbide (WC/CoCr), Stellite alloy, nickel-based alloy (Ni60/Ni55), and others. Coating thickness ranges from 0.03 to 0.5mm and is customizable.
❓What 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 requirements.
❓Can the valve stem be customized to specific dimensions or drawings?
Yes. The product fully supports OEM/ODM customization. Customers can provide drawings or samples for custom processing. Materials, dimensions (length 80mm–600mm, non-standard lengths available), coatings, and connection structures can all be tailored to specific equipment models and operating conditions.
❓What materials are available for the valve stem base?
Available base materials include 40CrNiMoA, 42CrMo, 304/316/316L stainless steel, and 17-4PH precipitation-hardened stainless steel, as well as other oilfield-specific materials. Material selection depends on the working environment and media requirements.
❓How does the HVOF coating extend the service life of the valve stem?
The HVOF sprayed alloy coating achieves a hardness of HRC75, bonding strength ≥70MPa, and porosity <1%. This provides exceptional wear resistance, erosion resistance, and corrosion resistance, extending the valve stem's service life by 3–5 times compared to ordinary valve stems. This significantly reduces downtime, replacement frequency, and overall maintenance costs.