The Adapter (AM, AF) check valve is a one-piece body valve machined from bar stock. This is designed to be installed where threaded straight adapter pipe fittings are desired. The adapter check valve is available in AM (MNPT x FNPT) or in AF (FNPT x MNPT) configurations. This valve can also be used in low pressure or vacuum relief applications by using the desired spring settings. NPT threads are per ASME B1.20.1.
| Nominal Pipe Size | Size Code | A | B HEX SIZE | C | D NPT THREAD | E NPT THREAD | Orifice Diameter.** |
|---|---|---|---|---|---|---|---|
| 1/2 | D | 1.62 | 1-1/8 | 0.90 | 1/2 | 1/2 | 0.348 |
| 3/4 | F | 1.77 | 1-1/4 | 1.01 | 3/4 | 3/4 | 0.464 |
| 1 | H | 1.98 | 1-5/8 | 1.08 | 1 | 1 | 0.593 |
| 1-1/4 | I | 2.16 | 2-1/4 | 1.17 | 1 1/4 | 1 1/4 | 0.890 |
| 1-1/2 | J | 2.37 | 2-1/2 | 1.38 | 1 1/2 | 1 1/2 | 0.890 |
| 2 | K | 2.56 | 3 | 1.44 | 2 | 2 | 1.385 |
| 2-1/2 | L | 3.21 | 3-3/4 | 1.86 | 2 1/2 | 2 1/2 | 1.555 |
| 3 | M | 3.47 | 4-1/2 | 2.03 | 3 | 2 | 2.025 |
| 4 | N | 4.38 | 5-1/2 | 2.87 | 4 | 4 | 2.560 |
| * 316 Stainless Steel (SS) | * Alloy B (HB) |
| * Alloy 20 (A2) | * Alloy C-276 (HC) |
| * Brass (BR) | * Alloy 400 or MONEL® (MO) |
| * Carbon Steel (CS) | * Titanium (TI) |
| Body Material | Availability | Non-Shock Pressure-Temperature Rating |
|---|---|---|
| 316 Stainless Steel (SS) Carbon Steel (CS) Brass (BR) | Standard | 3000 PSIG @ 100°F (1500 PSIG for o-ring seats) |
| Alloy 20 (A2) Alloy C-276 (HC) Alloy 400 or MONEL®(MO) | Semi-standard | |
| Alloy B (HB) Titanium (TI) | Contact the factory for these or other materials. |
Seat material and spring material selection may limit the recommended service temperature.
See seat ratings, spring ratings, and body material ratings for their respective recommended service temperatures.
Consult the factory for reduced P-T rating above 100 °F. Standard spring material is 316 Stainless Steel.
PRESSURE DROP PSI
| Size | AF Cv | AM Cv |
|---|---|---|
| 1/2 | 2.2 | 2.2 |
| 3/4 | 3.8 | 4 |
| 1 | 7 | 7.1 |
| 1-1/4 | 13.1 | 16.6 |
| 1-1/2 | 16.0 | 16.6 |
| 2 | 31.7 | 40.3 |
| 2-1/2 | 52.6 | 57.9 |
| 3 | 65.8 | 75.4 |
| 4 | 120 | 124 |
FOR WATER AT 72 F
WATER FLOW RATE - GPM
Note: All flow curves and Cv values presume the valve are fully open with 1/2 PSI cracking pressure springs. Consult the factory for more information.
| SIZE | PART NUMBER | ALL MATERIALS |
|---|---|---|
| 1/2 | D | 4.3 oz. |
| 3/4 | F | 5.5 oz. |
| 1 | H | 10.1 oz. |
| 1-1/4 | I | 1.2 lb. |
| 1-1/2 | J | 1.9 lb. |
| 2 | K | 2.5 lb. |
| 2-1/2 | L | 4.9 lb. |
| 3 | M | 7.4 lb. |
| 4 | N | 14 lb. |
| Valve Style | Size Range | Body Materials Other Options | Allowable Seat Materials Other Options | Standard Cracking Pressures Other Options More Info. | Standard Spring Material More Info |
|---|---|---|---|---|---|
| AF AM | 1/2" | 316 SS Brass C. Steel | AFLAS®. BUNA-N EPDM. KALREZ® “METAL-TO-METAL” NEOPRENE PTFE FKM | .125 .500 1.50 3.50 | 316 SS |
| 3/4 | 316 SS Brass C. Steel | AFLAS®. BUNA-N EPDM. KALREZ® “METAL-TO-METAL” NEOPRENE PTFE FKM | .125 .500 1.50 3.50 | 316 SS | |
| 1 | 316 SS Brass C. Steel | AFLAS®. BUNA-N EPDM. KALREZ® “METAL-TO-METAL” NEOPRENE PTFE FKM | .125 .500 1.50 3.50 | 316 SS | |
| 1-1/4 | 316 SS Brass C. Steel | AFLAS®. BUNA-N EPDM. KALREZ® “METAL-TO-METAL” NEOPRENE PTFE FKM | .125 .500 1.50 3.50 | 316 SS | |
| 1-1/2 | 316 SS Brass C. Steel | AFLAS®. BUNA-N EPDM. KALREZ® “METAL-TO-METAL” NEOPRENE PTFE FKM | .125 .500 1.50 3.50 | 316 SS | |
| 2 | 316 SS Brass C. Steel | AFLAS®. BUNA-N EPDM. KALREZ® “METAL-TO-METAL” NEOPRENE PTFE FKM | 316 SS | ||
| 2-1/2 | 316 SS Brass C. Steel | AFLAS®. BUNA-N EPDM. KALREZ® “METAL-TO-METAL” NEOPRENE PTFE FKM | 316 SS | ||
| 3 | 316 SS Brass C. Steel | AFLAS®. BUNA-N EPDM. KALREZ® “METAL-TO-METAL” NEOPRENE PTFE FKM | 316 SS | ||
| 4 | 316 SS Brass C. Steel | AFLAS®. BUNA-N EPDM. KALREZ® “METAL-TO-METAL” NEOPRENE PTFE FKM | 316 SS |
For additional information about Check Valves
What is a Silent Check Valve?
What is a Spring Loaded Check Valve?
What is a Poppet Check Valve?
What is an Inline Check Valves?
