236B Bronze Swing Check Valve
Engineered for demanding commercial and industrial systems, the 236B Bronze Swing Check Valve delivers dependable backflow prevention in water, oil, gas, and low-pressure steam applications. Featuring a corrosion-resistant bronze body and MSS-SP-80 compliance, this valve combines rugged construction with a maintenance-friendly "Y" pattern design for long-term performance.
Key Features & Benefits
✔️ Wye-Pattern Design – Streamlined flow path minimizes pressure drop and allows easy inspection/cleaning without system disassembly.
✔️ DZR Brass Disc & Bronze Body – Dezincification-resistant disc and ASTM B62 bronze body withstand corrosive media and thermal cycling.
✔️ 125# WSP / 200# WOG Ratings – Certified for steam (125 PSI) and water/oil/gas (200 PSI) service.
✔️ ASME B1.20.1-NPT Threads – Leak-proof FNPT connections ensure secure installations.
✔️ Dual Seat Options – Choose 236B (Metal Seat) for high-temperature resilience or 236BT (Virgin PTFE Seat) for chemical resistance.
Technical Specifications
- Body: Bronze (ASTM B62)
- Disc: DZR Brass (UNS C35330)
- Ends: FNPT x FNPT
- Pattern: Swing Check, "Y" Type
- Standards: MSS-SP-80, ASME B1.20.1
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Pressure Ratings:
- 200 PSI WOG (Water, Oil, Gas)
- 125 PSI WSP (Steam)
Why Choose the 236B Series?
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Low Maintenance: Y-pattern design simplifies disc inspection and debris removal.
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Corrosion Defense: DZR components resist dezincification in aggressive fluids.
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Flexible Configuration: PTFE seat (236BT) ideal for chemical or high-purity systems.
Ideal Applications
- HVAC hydronic systems
- Pump discharge lines
- Industrial process water networks
- Oil/gas pipeline protection
- Fire suppression systems
Built for Reliability
✅ MSS-SP-80 Certified – Meets stringent industry benchmarks for check valves.
✅ Smooth Operation – Swing disc design reduces water hammer risk.
✅ Durable Construction – Engineered to handle pressure surges and thermal stress.
Trusted Performance – The go-to choice for engineers prioritizing backflow prevention and ease of maintenance.
Dimension, Cv, Weight
| Size | Thread (NPT) | H (in/mm) | L (in/mm) | P (in/mm) | Cv | Wt. 236B (lb/g) | Wt. 236BT (lb/g) |
|---|---|---|---|---|---|---|---|
| 1/4" | 1/4 - 18 NPT | 1.57 / 40 | 2.04 / 52 | 0.51 / 13 | 4.81 | 0.44 / 200 | 0.47 / 213 |
| 3/8" | 3/8 - 18 NPT | 1.57 / 40 | 2.04 / 52 | 0.51 / 13 | 4.81 | 0.45 / 204 | 0.45 / 204 |
| 1/2" | 1/2 - 14 NPT | 1.67 / 42 | 2.20 / 56 | 0.59 / 15 | 6.18 | 0.58 / 263 | 0.58 / 263 |
| 3/4" | 3/4 - 14 NPT | 1.97 / 50 | 2.76 / 70 | 0.75 / 19 | 11.1 | 0.96 / 435 | 1.04 / 472 |
| 1" | 1 - 11.5 NPT | 2.28 / 58 | 3.15 / 80 | 0.99 / 25 | 18.1 | 1.34 / 608 | 1.36 / 617 |
| 1 1/4" | 1 1/4 - 11.5 NPT | 2.71 / 69 | 3.78 / 96 | 1.25 / 32 | 37.4 | 2.28 / 1034 | 2.24 / 1016 |
| 1 1/2" | 1 1/2 - 11.5 NPT | 3.19 / 81 | 4.33 / 110 | 1.50 / 38 | 53.6 | 3.23 / 1465 | 3.23 / 1465 |
| 2" | 2 - 11.5 NPT | 3.86 / 98 | 5.04 / 128 | 1.97 / 50 | 91.1 | 5.21 / 2363 | 5.21 / 2363 |
| 2 1/2" | 2 1/2 - 8 NPT | 4.57 / 116 | 6.14 / 156 | 2.50 / 64 | 147 | 8.27 / 3751 | 8.47 / 3842 |
| 3" | 3 - 8 NPT | 5.35 / 136 | 7.24 / 184 | 3.00 / 76 | 211 | 11.73 / 5321 | 12.06 / 5470 |
| Pressure Rating | Temperature Range |
|---|---|
| 200 PSI | 15°F to 160°F (-9°C to 71°C) |
| 125 PSI (Max) | Up to 366°F (186°C) |
*Temperature conversions shown for international reference
Material
| Part | Material | Specification |
|---|---|---|
| 1 | Body | Bronze ASTM B62 C83600 |
| 2 | Disc | DZR Brass UNS C35330 |
| 3 | Stem | Brass ASTM B124 C37700 |
| 4 | Screw | Brass ASTM B124 C37700 |
| 5 | Gasket | PTFE TF1502 |
| 6 | Cap | Bronze ASTM B62 C83600 |
| 7 | Name Plate | Aluminum - |
| 8* | Gasket | PTFE - |
| 9* | Nut | Brass ASTM B124 C37700 |
* Copyright ©2007