NRV with SMS Union
What is a NRV with SMS Union?
A Dairy NRV (Non-Return Valve) with SMS Union is a hygienic check valve designed to allow one-way flow in sanitary processing systems. It prevents backflow of fluids, safeguarding product purity and protecting equipment like pumps and tanks from contamination or pressure surges. Equipped with SMS union ends, this NRV offers easy assembly/disassembly, making it ideal for clean-in-place (CIP) and manual cleaning operations.
Asaid Steel Industries supplies high-quality Dairy NRVs with SMS Unions, built from SS 304 or SS 316L, conforming to international hygienic standards, with excellent performance in low to medium-pressure sanitary piping.
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 | Non-Return Valve (Check Valve) with SMS 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 | SMS Union Ends (easy assembly/disassembly) |
| Flow Type | Uni-Directional, Spring-Assisted or Lift Type | |
| 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 | Spring or Lift Operated |
| 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 |
|---|---|---|---|---|---|
| NRV with SMS Union | 2″ (50 mm) | 75 mm | 120 mm | 50 mm | 3.2 kg |
| NRV with SMS Union | 3″ (80 mm) | 90 mm | 140 mm | 80 mm | 4.8 kg |
| NRV with SMS Union | 4″ (100 mm) | 105 mm | 160 mm | 100 mm | 6.5 kg |
| NRV with SMS Union | 6″ (150 mm) | 130 mm | 190 mm | 150 mm | 9.5 kg |
| NRV with SMS Union | 8″ (200 mm) | 155 mm | 220 mm | 200 mm | 14 kg |
| NRV with SMS Union | 10″ (250 mm) | 180 mm | 250 mm | 250 mm | 19 kg |
| NRV with SMS Union | 12″ (300 mm) | 205 mm | 280 mm | 300 mm | 25 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 NRV with SMS Union
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What is the function of a Dairy NRV with SMS Union?
Why are SMS unions preferred in dairy lines?
Can this NRV handle hot CIP solutions?
What sizes are available?
