Wear Resistant Screw Rod for High Pressure Wellhead Valves - China Suppliers Factory Product
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
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Inner: Anti-rust protective packaging
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Outer: Fumigation-free plywood box or export carton
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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 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). Material selection depends on the working environment, pressure, and corrosion requirements of your application.
Q
What is HVOF spraying and why is it used on this Screw Rod?
HVOF (High Velocity Oxygen Fuel) spraying is an advanced thermal spray process that deposits a dense, ultra-hard coating — typically tungsten carbide (WC) — onto the rod surface. This coating achieves hardness ≥ HRC 75, with no pores and strong adhesion, providing outstanding wear resistance, corrosion resistance, and significantly extending service life compared to conventional surface treatments.
Q
What is the maximum working pressure the Screw Rod can handle?
The standard Screw Rod supports working pressures up to 105MPa. For applications requiring even higher pressure ratings, customized versions are available upon request to meet your specific engineering requirements.
Q
Can the Screw Rod be customized in terms of size, material, or coating?
Yes. Full customization is supported. Customers can provide drawings or samples for non-standard size production. Material grade, surface coating type, thread specifications, and dimensional tolerances can all be tailored to meet specific application demands across petroleum, petrochemical, water treatment, and other industries.
Q
What types of valves and industries is this Screw Rod suitable for?
The Screw Rod is designed for industrial control valves, petroleum & petrochemical valves, high-pressure pipeline valves, and water treatment valves. It is widely applied in the petroleum, petrochemical, natural gas, water treatment, and chemical processing industries — especially in environments involving high pressure, high temperature, abrasive particles, or chemical corrosion.
Q
How is the Screw Rod packaged and shipped for export?
Each Screw Rod is packed with inner anti-rust protective packaging and placed in a fumigation-free plywood box or export carton for outer protection. The packaging is shockproof, damp-proof, and anti-corrosive to ensure product integrity during long-distance sea freight. Both ocean freight and ground & rail delivery logistics options are available.