Butterfly Valves
What are Butterfly Valves?
Butterfly valves are quarter-turn flow control devices that regulate or isolate fluids using a rotating disc. These valves are compact, lightweight, and suitable for applications requiring quick shut-off.
Asiad Steel Industries is a trusted manufacturer, supplier, and exporter of high-quality butterfly valves under the Racer brand, used across various sectors. They provide reliable sealing, cost-efficiency, and easy integration in both manual and automated systems.
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) | 2” to 48” (DN50 – DN1200) |
| Pressure Ratings | PN Ratings | PN10 |
| Material Options | Body | Stainless Steel (SS304, SS304L, SS316, SS316L) |
| Disc | Stainless Steel (SS304, SS316, SS316L), Duplex 2205 | |
| Seat / Liner | PTFE, RPTFE, EPDM, NBR, Viton | |
| Stem / Shaft | Stainless Steel (SS304, SS316) | |
| Standards & Certifications | Design Standards | API 609, ASME B16.34, EN 593 |
| Face-to-Face / End Connections | ASME B16.10, ASME B16.5, EN 558 | |
| Pressure Testing | API 598, ISO 5208, EN 12266 | |
| Certifications | ISO 9001, PED 2014/68/EU, NACE MR0175, CE Marking | |
| Design Features | Operating Torque | As per valve size and pressure rating |
| Stem Type | One-piece or two-piece, key-way or splined | |
| End Connections | Wafer, Lug, Double Flanged | |
| Fire-Safe Option | Optional design with metal seat for fire-safe operation | |
| Coating & Surface Finish | Anti-Corrosion Coating | Epoxy, PTFE, Powder Coating |
| Surface Finish | Machined, Polished, Passivated | |
| Testing & Inspection | Pressure Testing | Hydrostatic, Pneumatic |
| Non-Destructive Testing | Dye Penetrant (DPT), Magnetic Particle (MPI), Radiography (RT) | |
| Destructive Testing | Tensile, Hardness, Impact |
Dimensions
| Nominal Size (DN) | Face-to-Face (L, mm) | Diameter (D, mm) | Bolt Circle Diameter (K, mm) | Number of Bolts (n) | Bolt Size (d) | Valve Height (H, mm) | Handle Length (HL, mm) |
|---|---|---|---|---|---|---|---|
| DN15 (½”) | 43 | 95 | 65 | 4 | M10 | 90 | 100 |
| DN20 (¾”) | 43 | 105 | 75 | 4 | M10 | 95 | 110 |
| DN25 (1”) | 46 | 115 | 85 | 4 | M10 | 100 | 120 |
| DN32 (1¼”) | 51 | 140 | 100 | 4 | M12 | 110 | 130 |
| DN40 (1½”) | 51 | 150 | 110 | 4 | M12 | 115 | 140 |
| DN50 (2”) | 57 | 165 | 125 | 4 | M12 | 125 | 150 |
| DN65 (2½”) | 76 | 185 | 145 | 4 | M16 | 140 | 170 |
| DN80 (3”) | 76 | 200 | 160 | 4 | M16 | 150 | 180 |
| DN100 (4”) | 89 | 220 | 180 | 8 | M16 | 170 | 200 |
| DN125 (5”) | 108 | 250 | 210 | 8 | M16 | 190 | 220 |
| DN150 (6”) | 114 | 285 | 240 | 8 | M20 | 210 | 250 |
| DN200 (8”) | 140 | 340 | 295 | 8 | M20 | 250 | 300 |
| DN250 (10”) | 165 | 405 | 355 | 12 | M20 | 300 | 350 |
| DN300 (12”) | 178 | 460 | 410 | 12 | M20 | 340 | 400 |
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 485 – 750 | MPa (SS304, SS304L, SS316, SS316L) |
| 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 | Excellent | – |
| Thermal Conductivity | 15 – 25 | 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 | – |
| Surface Finish | Machined, Polished, Passivated | – |
| Operating Temperature Range | -20 to 200 | °C (depending on seat material) |
| Pressure Rating | PN10 | ISO 5208 / API 598 |
Chemical Composition
| Element | SS 304 | SS 304L | SS 316 | SS 316L |
|---|---|---|---|---|
| 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 |
| 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 |
| Iron (Fe) | Balance | Balance | Balance | Balance |
| Molybdenum (Mo) | — | — | 2.0 – 3.0 | 2.0 – 3.0 |
Applications of Butterfly Valves
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What makes butterfly valves ideal for large-diameter pipes?
Can butterfly valves be automated?
What types of fluids are suitable for butterfly valves?
How do I select the right seat material?
