TC NRV
What are TC NRVs?
A TC NRV, or Tri-Clamp Non-Return Valve, is a one-way flow control valve used in sanitary piping systems to prevent backflow. Designed with a Tri-Clamp (Tri-Clover) connection, this valve allows fluid to flow in one direction while automatically closing when reverse flow is detected—ensuring hygienic process integrity.
Asiad Steel Industries provides high-quality TC Non-Return Valves (NRV) engineered for hygienic applications. These valves ensure unidirectional flow, preventing backflow in dairy, food, beverage, and pharmaceutical systems.
Key Features
Leak-Proof
Jointing
Sanitary
Design
Easy to
Clean
Standards
Compliant
Corrosion
Resistant
Specifications
| Specification Category | Parameter / Feature | Details / Options |
|---|---|---|
| Size Range | Nominal Pipe Size (NPS) | ½” to 48” (DN15 – DN1200) |
| Pressure Ratings | ANSI / ASME Class | Class 150, 300, 600, 900, 1500, 2500 |
| PN Ratings | Pressure Nominal | PN6, PN10, PN16, PN25, PN40, PN64 |
| Fitting Types | Body Types | Swing Type, Lift Type, Wafer Type, Flanged Type |
| End Connections | Beveled Ends, Plain Ends, Threaded, Socket Weld Ends | |
| Material Options | Stainless Steel | SS 304, SS 304L, SS 316, SS 316L, SS 321 |
| Standards & Certifications | ASME / ANSI | ASME B16.34, ASME B16.5 (Flanged), ASME B16.11 (Socket Weld & Threaded) |
| ASTM | ASTM A351, ASTM A182 | |
| European Standards | EN 558, EN 1092-1 | |
| Certifications | ISO 9001, PED 2014/68/EU, NACE MR0175, IBR Approved | |
| Design Features | Wall Thickness | As per ASME B36.10 (CS), ASME B36.19 (SS), customized options |
| Disc / Internal Mechanism | Stainless Steel disc / spring-loaded or swing disc | |
| Tolerance | As per ASME/ANSI standards | |
| Coating & Surface Finish | Anti-Corrosion Coating | Rust Preventive Oil, Black Oxide, Hot-Dip Galvanized |
| 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 Pipe Size (NPS) | Face-to-Face (L) mm | Flange Diameter (D) mm | Bolt Circle (BC) mm | No. of Bolts | Bolt Size | Disc Diameter (d) mm | Valve Height (H) mm | Pressure Class |
|---|---|---|---|---|---|---|---|---|
| ½” (DN15) | 102 | 95 | 70 | 4 | M12 | 50 | 100 | 150 – 1500 |
| ¾” (DN20) | 114 | 105 | 78 | 4 | M12 | 65 | 110 | 150 – 1500 |
| 1” (DN25) | 127 | 115 | 85 | 4 | M12 | 80 | 120 | 150 – 1500 |
| 1½” (DN40) | 152 | 140 | 105 | 4 | M16 | 100 | 135 | 150 – 1500 |
| 2” (DN50) | 178 | 150 | 120 | 4 | M16 | 120 | 150 | 150 – 1500 |
| 2½” (DN65) | 190 | 165 | 135 | 4 | M16 | 135 | 165 | 150 – 1500 |
| 3” (DN80) | 216 | 185 | 160 | 8 | M16 | 150 | 180 | 150 – 1500 |
| 4” (DN100) | 254 | 215 | 190 | 8 | M16 | 180 | 210 | 150 – 1500 |
| 6” (DN150) | 305 | 280 | 250 | 8 | M20 | 230 | 260 | 150 – 1500 |
| 8” (DN200) | 356 | 335 | 310 | 8 | M20 | 290 | 300 | 150 – 1500 |
| 10” (DN250) | 406 | 405 | 370 | 12 | M20 | 350 | 350 | 150 – 1500 |
| 12” (DN300) | 457 | 460 | 430 | 12 | M24 | 400 | 400 | 150 – 1500 |
| 14” (DN350) | 508 | 520 | 485 | 12 | M24 | 450 | 450 | 150 – 1500 |
| 16” (DN400) | 559 | 580 | 540 | 16 | M24 | 500 | 500 | 150 – 1500 |
| 18” (DN450) | 610 | 640 | 600 | 16 | M27 | 550 | 550 | 150 – 1500 |
| 20” (DN500) | 660 | 700 | 660 | 20 | M27 | 600 | 600 | 150 – 1500 |
| 24” (DN600) | 762 | 815 | 770 | 20 | M30 | 710 | 700 | 150 – 1500 |
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 485 – 750 | MPa (Stainless 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 | Excellent (Stainless 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 | Serrated / Stock / Smooth finish | per ASME B16.11 |
| Welding Type | Butt-welded or Slip-on | (depending on piping system) |
| Operating Temperature Range | -46 to 600 | °C (material-dependent) |
| Pressure Rating | Class 150, 300, 600, 900, 1500, 2500 | A |
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 |
| Iron (Fe) | Balance | Balance | Balance | Balance |
Applications of TC NRV
Dairy & Food Processing
Units
Beverage Plants
Pharmaceutical
Cosmetic & Personal
Care
Chemical & Enzyme
Production
Laboratory and Testing
Facilities
Do you have questions?
What is the use of a TC NRV in sanitary systems?
How does a Tri-Clamp NRV work?
Are TC NRVs suitable for CIP/SIP systems?
Which industries commonly use TC NRVs?
Can the seals in TC NRVs be replaced?
