Wear Resistant Screw Rod for High Pressure Wellhead Valves - China Suppliers & Factory Highlights
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.
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
- Ocean Freight
- Ground & Rail Delivery
Frequently Asked Questions
Q
What base materials are available for the Screw Rod?
A
The Screw Rod is available in high-strength carbon steel (45#/4140), alloy steel (42CrMo), and stainless steel (304/316L). Custom material selection is also supported based on specific application requirements and working conditions.
Q
What is HVOF spraying and why is it used on the Screw Rod surface?
A
HVOF (High Velocity Oxygen Fuel) spraying is an advanced thermal spray technology that deposits a dense, wear-resistant, and corrosion-resistant coating — such as tungsten carbide (WC) — onto the rod surface. This coating features ultra-high hardness (≥ HRC 75), strong adhesion, and no porosity, providing superior protection against particle abrasion, medium erosion, and chemical corrosion.
Q
What working pressure and temperature ranges can the Screw Rod handle?
A
The standard Screw Rod supports working pressures up to 105MPa and operating temperatures from -40℃ to 220℃. Higher pressure grades and high-temperature customized versions are available upon request to meet demanding industrial requirements.
Q
Can the Screw Rod be customized to non-standard dimensions?
A
Yes. In addition to standard sizes, non-standard customization is fully supported. Customers can provide drawings or samples, and the Screw Rod will be manufactured accordingly, including customization of material, size, thread specifications, and surface coating to match specific valve system requirements.
Q
What industries and applications is the Screw Rod suitable for?
A
The Screw Rod is widely used in petroleum, petrochemical, water treatment, and industrial control valve systems. It is especially suited for high-pressure wellhead valves, pipeline valves, and valves operating in corrosive, abrasive, or high-temperature environments where long service life and reliability are critical.
Q
How is the Screw Rod packaged and shipped for export?
A
The Screw Rod is packaged with anti-rust protective inner packaging and placed in fumigation-free plywood boxes or export cartons for the outer layer. The packaging is shockproof, damp-proof, and anti-corrosive to ensure safe delivery. Logistics services include ocean freight and ground & rail delivery to meet international shipping needs.