Needle Valves
What are Needle Valves?
Needle Valves are precision-engineered valves used to regulate the flow of liquids and gases with high accuracy. They feature a slender, needle-shaped plunger that fits into a conical seat, allowing for fine control over flow rate in low-pressure or high-precision systems.
Asiad Steel Industries is a leading manufacturer and exporter of industrial-grade Needle Valves under the Racer brand, widely used in instrumentation, hydraulic, and pneumatic systems across multiple industries.
Key Features
Leak-Proof
Jointing
Robust
Construction
High Pressure
Resistance
Standards
Compliant
Corrosion
Resistant
Specifications
| Specification Category | Parameter / Feature | Details / Options |
|---|---|---|
| Size Range | Nominal Pipe Size (NPS) | ¼” to 4” (DN6 – DN100) |
| Pressure Ratings | ANSI / ASME Class | Class 150, 300, 600, 900, 1500, 2500 |
| PN Ratings | Pressure Nominal | PN6, PN10, PN16, PN25, PN40, PN64 |
| Fitting Types | Needle Valves | Direct Mount, Angle Type, Miniature Needle Valves, Compact Design |
| Material Options | Stainless Steel | SS 304, SS 304L, SS 316, SS 316L, SS 321 |
| Standards & Certifications | ASME / ANSI | ASME B16.34 (Valves), ASME B1.20.1 (Threaded Connections) |
| ASTM | ASTM A182, ASTM A276, ASTM A479 | |
| European Standards | EN 10204, EN 10253 | |
| Certifications | ISO 9001, PED 2014/68/EU, NACE MR0175, IBR Approved | |
| Design Features | Wall Thickness | As per ASME B16.34, customized options |
| End Connections | Threaded, Socket Weld, Flanged, Compression Fittings | |
| Stem & Seal Design | Rising Stem, Non-Rising Stem, PTFE Packing, Metal Seated Options | |
| Tolerance | As per ASME / ANSI standards | |
| Coating & Surface Finish | Anti-Corrosion Coating | Rust Preventive Oil, Black Oxide |
| Optional Coatings | Epoxy, PTFE, Polyurethane | |
| Surface Finish | Machined, Pickled, Polished, Passivated | |
| Testing & Inspection | Pressure Testing | Hydrostatic, Pneumatic |
| Non-Destructive Testing | Radiography (RT), Ultrasonic (UT), Magnetic Particle (MPI), Dye Penetrant (DPT) | |
| Destructive Testing | Tensile, Hardness, Impact |
Dimensions
| Nominal Size (NPS/DN) | Face-to-Face Length (L) mm | End-to-End Height (H) mm | Threaded/Flanged Diameter (D) mm | Bolt Circle Diameter (BCD) mm | No. of Bolts (n) | Handwheel Diameter (mm) |
|---|---|---|---|---|---|---|
| ¼” / DN6 | 100 | 130 | 22 | 35 | 4 | 70 |
| 3/8” / DN10 | 110 | 140 | 28 | 45 | 4 | 75 |
| ½” / DN15 | 120 | 150 | 35 | 55 | 4 | 80 |
| ¾” / DN20 | 140 | 170 | 45 | 65 | 4 | 90 |
| 1” / DN25 | 160 | 190 | 55 | 75 | 4 | 100 |
| 1¼” / DN32 | 180 | 210 | 70 | 90 | 4 | 110 |
| 1½” / DN40 | 200 | 230 | 80 | 100 | 4 | 120 |
| 2” / DN50 | 220 | 260 | 95 | 115 | 4 | 140 |
| 2½” / DN65 | 250 | 300 | 110 | 130 | 4 | 160 |
| 3” / DN80 | 280 | 340 | 125 | 145 | 4 | 180 |
| 4” / DN100 | 320 | 390 | 150 | 165 | 8 | 200 |
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 485 – 750 | MPa (Stainless Steel, Carbon Steel, Alloy Steel) |
| Yield Strength | 170 – 450 | MPa |
| Hardness | 120 – 200 | HB (Brinell) |
| Elongation | ≥ 20 – 30 | % |
| Density | 7.8 – 8.0 | g/cm³ |
| Impact Toughness | ≥ 27 – 70 | J (Charpy, grade-dependent) |
| Modulus of Elasticity (E) | ~200 | GPa |
| Fatigue Strength | 250 – 450 | MPa |
| Corrosion Resistance | Good to Excellent (SS > CS > Alloy Steel) | – |
| Thermal Conductivity | 15 – 50 | W/m·K |
| Coefficient of Thermal Expansion | 11 – 17 ×10⁻⁶ | /°C |
| Yield Ratio (YS/UTS) | 0.40 – 0.65 | – |
| Poisson’s Ratio | 0.27 – 0.30 | – |
| Brinell Hardness Range | 120 – 200 | HB |
| Surface Finish | Machined / Polished / Passivated | – |
| Operating Temperature Range | -46 to 400 | °C (material-dependent) |
| Pressure Rating | PN10, PN16, Class 150, 300 | ASME B16.34 / ISO 4126 Standards |
| End Connections | Threaded, Flanged | ASME B16.5 / B16.11 |
| Valve Type | Needle Valve (Rising & Non-Rising Stem) | – |
Chemical Composition
| Element | SS 304 (%) | SS 304L (%) | SS 316 (%) | SS 316L (%) |
|---|---|---|---|---|
| Carbon (C) | ≤ 0.08 | ≤ 0.03 | ≤ 0.08 | ≤ 0.03 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 |
| Chromium (Cr) | 18.0 – 20.0 | 18.0 – 20.0 | 16.0 – 18.0 | 16.0 – 18.0 |
| Nickel (Ni) | 8.0 – 10.5 | 8.0 – 12.0 | 10.0 – 14.0 | 10.0 – 14.0 |
| Molybdenum (Mo) | — | — | 2.0 – 3.0 | 2.0 – 3.0 |
| Nitrogen (N) | — | — | ≤ 0.10 | ≤ 0.10 |
| Iron (Fe) | Balance | Balance | Balance | Balance |
Applications of Needle Valves
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What makes needle valves different from ball valves?
Can needle valves handle high-pressure applications?
Are needle valves available with compression ends?
Do you offer needle valves with lockable handles?
