Butterfly Valve with Union
What is a Butterfly Valve with Union?
A Dairy Butterfly Valve with Union is a hygienic, quarter-turn valve designed for controlling and isolating flow in dairy and food processing pipelines. It features a central rotating disc that regulates fluid passage, combined with union-type ends for easy assembly, disassembly, and maintenance. These valves are ideal for sanitary applications, offering minimal pressure drop, smooth flow, and superior cleanability.
Asaid Steel Industries supplies high-performance Dairy Butterfly Valves with Union crafted from SS 304 and SS 316L, meeting 3A and FDA sanitary standards for use in dairy, beverage, and pharmaceutical 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 Size | 2″ to 12″ (50 mm – 300 mm, custom sizes available) |
| Pressure Ratings | ANSI / ASME Class | Class 150, 300 |
| PN Ratings | PN10, PN16, PN25 | |
| Valve Type | Product Type | Butterfly Valve with Union, Hygienic / Sanitary Design |
| Material Options | Body & Disc | Stainless Steel SS304, SS316, SS316L |
| Seals / Gaskets | EPDM, PTFE, Silicone (Food Grade) | |
| Standards & Certifications | ASTM | ASTM A351, ASTM A182 |
| ASME / ANSI | ASME B16.34, ASME BPE | |
| European Standards | EN 1092, ISO 2852 | |
| Certifications | 3A Sanitary, FDA, ISO 9001, CE Marked | |
| Design Features | End Connections | Union Ends, Socket Weld, Tri-Clamp optional |
| Flow Type | Bi-Directional, Quarter-Turn Operation | |
| Operating Temperature | -20°C to 180°C (depending on seal material) | |
| Surface Finish | Ra ≤ 0.8 µm internal, Polished / Pickled External | |
| Tolerance | Dimensional Tolerance | As per ASME BPE / EN Standards |
| Coating & Surface Finish | Anti-Corrosion | Passivation, Electro-Polished |
| Optional Coatings | PTFE Coating, Nickel Plating | |
| Testing & Inspection | Pressure Testing | Hydrostatic, Pneumatic |
| Non-Destructive Testing | Visual, Dye Penetrant (DPT) | |
| Destructive Testing | Torque Test, Seal Integrity Test | |
| Operating Features | Operation | Manual Lever, Gear, Pneumatic or Electric Actuation |
| Leakage Rate | Bubble Tight / Zero Leakage as per API 598 |
Dimensions
| Valve Type | Nominal Size (DN / NPS) | Face-to-Face (L) | End-to-End (H) | Disc Diameter (D) | Weight per Piece |
|---|---|---|---|---|---|
| Butterfly Valve with Union | 2″ (50 mm) | 70 mm | 110 mm | 50 mm | 3.0 kg |
| Butterfly Valve with Union | 3″ (80 mm) | 85 mm | 130 mm | 80 mm | 4.5 kg |
| Butterfly Valve with Union | 4″ (100 mm) | 100 mm | 150 mm | 100 mm | 6.0 kg |
| Butterfly Valve with Union | 6″ (150 mm) | 125 mm | 180 mm | 150 mm | 9.0 kg |
| Butterfly Valve with Union | 8″ (200 mm) | 145 mm | 210 mm | 200 mm | 13 kg |
| Butterfly Valve with Union | 10″ (250 mm) | 165 mm | 240 mm | 250 mm | 18 kg |
| Butterfly Valve with Union | 12″ (300 mm) | 185 mm | 270 mm | 300 mm | 24 kg |
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 485 – 750 | MPa (SS304 / SS316 / SS316L) |
| Yield Strength | 170 – 450 | MPa |
| Hardness | 120 – 200 | HB (Brinell) |
| Elongation | ≥ 20 – 30 | % |
| Density | 7.9 – 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 (SS316L > SS316 > SS304) | – |
| Thermal Conductivity | 15 – 25 | W/m·K |
| Coefficient of Thermal Expansion | 16 – 18 ×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 | Ra ≤ 0.8 µm internal, Polished external | – |
| Operating Temperature Range | -20 to 180 | °C (depending on seal material) |
| Pressure Rating | Class 150, 300 / PN10 – PN25 | ASME B16.34 / EN Standards |
| Leakage Rate | Bubble tight | API 598 |
Applications of Butterfly Valve with Union
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What is a Dairy Butterfly Valve with Union used for?
How is the valve cleaned?
What seal materials are available?
Can the valve be automated?
