Bronze Swing Check Valve | 236B / 236BT Series | FNPT × FNPT | 200 PSI WOG / 125 PSI @ 366°F
Bronze Swing Check Valve | 236B / 236BT Series | FNPT × FNPT | 200 PSI WOG / 125 PSI @ 366°F
RWV 236B / 236BT Bronze Swing Check Valve Series ensures reliable backflow prevention with smooth operation and quiet closure in plumbing, HVAC, and hydronic systems. Built with a bronze body and cap (ASTM B62 C83600) and a DZR brass swing disc, these Y-pattern valves deliver long-term corrosion resistance and dependable sealing performance for residential and commercial applications.
The series includes both 236B (Metal Seat) and 236BT (PTFE Seat) models — allowing users to choose between rugged, high-temperature durability or enhanced sealing for chemical and thermal resistance. Each valve meets MSS-SP-80 and ASME B1.20.1 standards, offering excellent Cv flow performance from 4.81 to 117.64.
Key Features & Benefits
- Threaded FNPT × FNPT Ends — NPT-compliant per ASME B1.20.1 for secure, leak-resistant installation.
- Seat Options for Versatility — Choose metal seat (236B) for heavy-duty durability or virgin PTFE seat (236BT) for improved chemical and temperature resistance.
- Pressure & Temperature Ratings — Rated 200 PSI from 15°F–160°F and up to 125 PSI at 366°F for hydronic, potable, and HVAC systems.
- Solid Bronze & Brass Construction — Bronze body and cap with DZR brass disc, brass stem, and PTFE gasket ensure long life and dezincification resistance.
- Compact Y-Pattern Swing Design — Minimizes turbulence, reduces noise, and provides efficient, quiet operation.
Dimension, Cv, and Weight
| Size | Port | H [in] | L [in] | P [in] | Cv | Wt. (236B) [lb] | Wt. (236BT) [lb] |
|---|---|---|---|---|---|---|---|
| ¼" | ¼ - 18 NPT | 1.57 | 2.04 | 0.51 | 4.81 | 0.44 | 0.47 |
| ⅜" | ⅜ - 18 NPT | 1.57 | 2.04 | 0.51 | 4.81 | 0.45 | 0.45 |
| ½" | ½ - 14 NPT | 1.67 | 2.20 | 0.59 | 6.18 | 0.58 | 0.58 |
| ¾" | ¾ - 14 NPT | 1.97 | 2.76 | 0.75 | 11.1 | 0.96 | 1.04 |
| 1" | 1 - 11.5 NPT | 2.28 | 3.15 | 0.99 | 18.1 | 1.34 | 1.36 |
| 1¼" | 1¼ - 11.5 NPT | 2.71 | 3.78 | 1.25 | 37.4 | 2.28 | 2.24 |
| 1½" | 1½ - 11.5 NPT | 3.19 | 4.33 | 1.50 | 53.6 | 3.23 | 3.23 |
| 2" | 2 - 11.5 NPT | 3.86 | 5.04 | 1.97 | 91.1 | 5.21 | 5.21 |
| 2½" | 2½ - 8 NPT | 4.57 | 6.14 | 2.50 | 147 | 8.27 | 8.47 |
| 3" | 3 - 8 NPT | 5.35 | 7.24 | 3.00 | 211 | 11.73 | 12.06 |
Pressure / Temperature Rating
| Pressure | Temperature Range |
|---|---|
| 200 PSI | 15°F to 160°F |
| 125 PSI | Up to 366°F |
Material Construction
| Part | Material | Specification |
|---|---|---|
| Body | Bronze | ASTM B62 C83600 |
| Disc | DZR Brass | UNS C35330 |
| Stem | Brass | ASTM B124 C37700 |
| Screw | Brass | ASTM B124 C37700 |
| Gasket | PTFE | TF1502 |
| Cap | Bronze | ASTM B62 C83600 |
| Name Plate | Aluminum | - |
| Gasket* | PTFE | - |
| Nut* | Brass | ASTM B124 C37700 |
*Included only with 236BT model.
Warning (California Prop 65): This product can expose you to chemicals including lead, known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.