Wear Resistant Screw Rod for High Pressure Wellhead Valves - China Suppliers and Factory Solutions
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
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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.
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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.
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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.
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4. Precision Machining & Easy Assembly
CNC precision processing ensures tight dimensional tolerance and excellent fitting with valves, enabling quick and hassle-free installation.
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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
- 🚢 Ocean Freight
- 🚛 Ground & Rail Delivery
Frequently Asked Questions
❓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). Non-standard material customization is also supported based on customer requirements or drawings.
❓What is HVOF spraying and why is it used on the Screw Rod?
✔️HVOF (High Velocity Oxygen Fuel) is an advanced thermal spray technology that deposits a dense, hard coating — such as tungsten carbide (WC) — onto the rod surface. This results in strong adhesion, zero porosity, and ultra-high hardness (≥ HRC 75), providing outstanding wear and corrosion resistance in harsh environments.
❓What working pressure and temperature can the Screw Rod withstand?
✔️The standard Screw Rod supports working pressures up to 105MPa and temperatures ranging from -40℃ to 220℃. High-pressure and high-temperature customized versions are available upon request.
❓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, petroleum & petrochemical valves, high-pressure pipeline valves, and water treatment valves, among others.
❓Can the Screw Rod be customized to non-standard sizes or specifications?
✔️Yes. In addition to standard sizes, we fully support non-standard customization based on customer-provided drawings or samples. Material selection, size, coating type, and surface treatment can all be tailored to meet specific application needs.
❓What packaging and shipping methods are used for export orders?
✔️Products are packed with anti-rust inner protective packaging and placed in fumigation-free plywood boxes or export cartons. The packaging is shockproof, damp-proof, and anti-corrosive. We support both ocean freight and ground & rail delivery to ensure safe and timely international shipment.