Wear Resistant Screw Rod for High Pressure Wellhead Valves - High Quality from China Suppliers and Factory
Product Description
The Screw Rod is a critical transmission component for industrial valves, specifically designed to control valve opening, closing, lifting, and precise flow regulation. As the core accessory of valves in harsh working conditions, it plays a key role in ensuring stable and reliable operation of valve systems.
Crafted from high-quality base materials, the product undergoes quenching and tempering heat treatment to enhance overall strength and toughness. Its surface is processed with HVOF (High Velocity Oxygen Fuel) spraying technology, depositing a wear-resistant and corrosion-resistant coating (e.g., tungsten carbide WC) that boasts strong adhesion, no pores, and ultra-high hardness. With precision CNC machining, the screw rod features accurate thread dimensions, excellent coaxiality, and smooth surface finish, ensuring seamless assembly and smooth operation without jamming.
Ideal for high-pressure, high-wear, and corrosive environments, this screw rod effectively resists medium erosion, particle abrasion, and chemical corrosion, significantly extending the service life of valves. It is widely used in petroleum, petrochemical, water treatment, and industrial control valve systems, becoming an indispensable key accessory for valves operating under severe working conditions.
Product Specifications
| Type | Screw Rod (Valve Accessory) |
| Base Material | High-strength carbon steel (45#/4140), alloy steel (42CrMo), stainless steel (304/316L) |
| Surface Technology | HVOF (High Velocity Oxygen Fuel) spraying (tungsten carbide WC coating optional) |
| Coating Hardness | ≥ HRC 75 |
| Working Pressure | Up to 105MPa (customizable for higher pressure grades) |
| Working Temperature | -40℃ ~ 220℃ (high-temperature customized versions available) |
| Processing Precision | Thread precision Grade 6-7, coaxiality ≤ 0.02mm |
| Surface Roughness | Ra ≤ 0.8μm HRC55~60; Chrome plating: HRC45~55 |
| Applicable Media | Crude oil, natural gas, water, chemical corrosive media, abrasive media with particles |
| Applicable Valves | Industrial control valves, petroleum & petrochemical valves, high-pressure pipeline valves, water treatment valves |
| Size Range | Standard sizes available; non-standard customization supported (per drawings/samples) |
| Quality Standard | Compliant with domestic and international standards for industrial valve accessories |
Product Features
⚙️ 1. Precise Transmission & Regulation
Precision-machined threads and smooth rod body ensure sensitive and accurate control of valve opening/closing and flow, improving valve operation stability.
🛡️ 2. Superior Wear & Erosion Resistance
HVOF-sprayed coating provides exceptional wear resistance, resisting particle abrasion and medium scouring, with a service life 3–5 times longer than ordinary screw rods.
💪 3. High Strength & Corrosion Resistance
Quenched and tempered base material + anti-corrosion coating offer double protection, withstanding high pressure, high temperature, and chemical corrosion without deformation or cracking.
🔩 4. Precision Machining & Easy Assembly
CNC precision processing ensures tight dimensional tolerance and excellent fitting with valves, enabling quick and hassle-free installation.
🌐 5. Wide Application & Customization
Suitable for petroleum, petrochemical, water treatment, and other harsh working conditions; supports customization of material, size, and coating as per customer needs.
Product Packaging
- Standard Export-Grade Packaging
- Inner: Anti-rust protective packaging
- Outer: Fumigation-free plywood box or export carton
- Shockproof, damp-proof and anti-corrosive, ensuring safe delivery by sea freight
Product Transportation
Logistics Services
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Ocean Freight
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Ground & Rail Delivery
Frequently Asked Questions (FAQ)
Q What base materials are available for the Screw Rod?
The Screw Rod is available in high-strength carbon steel (45#/4140), alloy steel (42CrMo), and stainless steel (304/316L). Custom material selections can also be accommodated based on specific application requirements.
Q What is HVOF spraying and why is it used on the Screw Rod?
HVOF (High Velocity Oxygen Fuel) spraying is an advanced thermal spray technology that deposits a dense, ultra-hard coating — typically tungsten carbide (WC) — onto the rod surface. This results in a coating hardness of ≥ HRC 75, with no pores and strong adhesion, providing superior wear and corrosion resistance compared to conventional surface treatments.
Q What working pressure and temperature ranges does the Screw Rod support?
The standard Screw Rod supports working pressures up to 105MPa and temperatures ranging from -40℃ to 220℃. Higher pressure grades and extended temperature ranges are available through customization to meet specific project demands.
Q Can the Screw Rod be customized to non-standard dimensions?
Yes. In addition to standard sizes, we fully support non-standard customization based on customer-supplied drawings or samples. Material type, coating specification, thread dimensions, and overall length can all be tailored to your exact requirements.
Q Which industries and valve types is this Screw Rod suitable for?
The Screw Rod is widely used in petroleum, petrochemical, water treatment, and industrial control systems. It is compatible with industrial control valves, high-pressure pipeline valves, petroleum & petrochemical valves, and water treatment valves operating in harsh or corrosive environments.
Q How is the Screw Rod packaged for export, and what shipping methods are available?
Each Screw Rod is packed with inner anti-rust protective packaging and placed in a fumigation-free plywood box or export carton that is shockproof, damp-proof, and anti-corrosive — ensuring safe transit. We support Ocean Freight as well as Ground & Rail Delivery to meet diverse logistics needs worldwide.