No. 300 Check Valve
$40.30 – $985.89
Used as an all purpose check valve for multiple applications, including cold and warm water, ethylene, glycol and air.
Type: Check Valve / Material: Bronze / Seal: Buna-S / Fluid Types: Air, Non-Potable Water
Buna-S Rubber Poppet for General Purpose Applications
The No. 300 check valve is made of a one-piece cast brass body. Designed to operate in any position, a sensitive spring has been added to close the poppet automatically. The rubber poppet is fully-formed around a solid steel insert to provide greater strength in commercial applications. Each valve is tested twice for casting integrity and backflow prevention. All valves are 100% American-Made and built to last.
Dimensions
| Part Number | Pipe Size | Flow Rate (Cv) | Overall Length | Valve Diameter | Valve Weight |
|---|---|---|---|---|---|
| 300-038 | 3/8" | 2 GPM | 2.63" | 1.16" | 0.50 lb. |
| 300-050 | 1/2" | 4 GPM | 2.69" | 1.40" | 0.45 lb. |
| 300-075 | 3/4" | 6 GPM | 3.31" | 1.62" | 0.80 lb. |
| 300-100 | 1" | 13 GPM | 3.69" | 2.00" | 1.05 lb. |
| 300-125 | 1-1/4" | 24 GPM | 4.57" | 2.41" | 1.80 lb. |
| 300-150 | 1-1/2" | 38 GPM | 4.88" | 2.69" | 2.25 lb. |
| 300-200 | 2" | 61 GPM | 5.56" | 3.34" | 3.10 lb. |
| 300-250 | 2-1/2" | 69 GPM | 6.79" | 3.81" | 7.15 lb. |
| 300-300-F | 3" * | 110 GPM | 7.40" | 4.71" | 11.80 lb. |
| 300-300 | 3" ** | 69 GPM | 6.79" | 3.81" | 6.60 lb. |
| 300-400 | 4" | 205 GPM | 10.00" | 5.80" | 21.70 lb. |
Cv is flow (GPM) with a 1 psi differential pressure. NPT threaded. **New valve: Standard female threads on both ends, Cv factor of 185. **Original valve: 2-1/2" valve body with 3" male thread on both ends, Cv factor of 69.
Materials & Operational Specifications
| Part Name | Specs |
|---|---|
| Body | Cast Bronze C84400 |
| Stem | 303 Stainless Steel |
| Poppet | Buna-S Rubber |
| Spring | 302 Stainless Steel |
| Cup Washer | 304 Stainless Steel |
| Locknut | 18/8 Stainless Steel |
| Country of Origin | Made in the USA |
| Max. Temperature | 225°F |
| Working Pressure | 400 psi |
| Cracking Pressure | 1-2 lbs. |
| Opt. Cracking Pressure | 1/2, 5, or 10 lbs. |
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov
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