Carbon Steel Needle Valves
What are Carbon Steel Needle Valves?
Carbon Steel Needle Valves are robust, high-performance flow control valves designed to regulate precise fluid or gas flow in high-pressure, high-temperature, or demanding industrial conditions. With a needle-shaped plunger and a narrow seat, these valves allow fine throttling and leak-free shutoff in compact pipework.
Asiad Steel Industries is a trusted manufacturer and supplier of Carbon Steel Needle Valves for critical applications across oil & gas, petrochemical, power, and process industries.
Key Features
- Precision Flow Control – Designed for smooth throttling in pressurized systems.
- Rugged Construction – Built from forged carbon steel for strength and durability.
- Leak-Proof Shutoff – Machined metal-to-metal seating ensures tight sealing.
- Cost-Effective – Ideal for demanding use where stainless steel is not required.
- Standards Compliant – Manufactured to ASTM, ASME, and DIN specifications.
Specifications
Mechanical Properties
Chemical Composition
Equivalent Grades
Weight Chart
Specifications
| Parameter | Details |
|---|---|
| Size Range | 1/8” to 1” (DN6 – DN25) |
| Pressure Rating | Up to 6000 PSI |
| End Connections | NPT, BSPT, Socket Weld, Compression |
| Body Material | ASTM A105 / A350 LF2 (CS) |
| Seat Type | Metal-to-Metal |
| Temperature Range | -29°C to +425°C |
| Operation | Manual (Rising Stem) |
| Property | Value |
|---|---|
| Tensile Strength | 485 – 620 MPa |
| Yield Strength | 250 – 355 MPa |
| Elongation | 20% – 30% |
| Hardness | 120 – 180 HB |
| Max Working Temp | Up to 425°C |
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.20 – 0.35 |
| Manganese (Mn) | 0.60 – 1.05 |
| Silicon (Si) | 0.15 – 0.35 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.040 |
| Iron (Fe) | Balance |
| Standard | Equivalent Grade |
|---|---|
| ASTM | A105, A350 LF2 |
| ASME | B16.34 |
| DIN | C22.8 |
| EN | 1.0460 |
| Size (Inch) | Material | Weight per 100 pcs (kg) |
|---|---|---|
| 1/4” | ASTM A105 | 14.0 |
| 3/8” | ASTM A105 | 17.2 |
| 1/2” | ASTM A105 | 21.5 |
| 3/4” | ASTM A105 | 29.0 |
| 1” | ASTM A105 | 35.0 |
Applications of Carbon Steel Needle Valves
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
Are carbon steel needle valves suitable for corrosive fluids?
Carbon steel is not ideal for corrosive fluids; SS or alloy steel is recommended for those applications.
What pressure can carbon steel needle valves handle?
They are suitable for pressures up to 6000 PSI, depending on size and configuration.
Are these valves compatible with hydraulic oils and air?
Yes, carbon steel needle valves are widely used in hydraulic oil, compressed air, and water lines.
Do these valves support cryogenic or sub-zero applications?
For low-temperature use, A350 LF2 (low-temp carbon steel) variants are available.
