This is a Mueller Steam Specialty double disc check valve. Please refer to the technical specifications in the listing for more information.
We have inspected this item and we do not have the capability to install the unit to fully test it. There are some cosmetic scuffs and scratches throughout the unit. Please refer to the photos for more information.
This unit only includes what is photographed in the listing. Made in USA.
Technical Specs
| Item | Double Disc Check Valve |
| Manufacturer Part Number | 4 71AHB3H |
| Pipe Size | 4 in |
| Body Material | Cast Iron |
| Connection Type | Flange |
| Media Temp. Range | -20 °F to 100 °F |
| Max. Pressure (CWP) | 200 psi |
| Max. Pressure (Steam) | Not Rated |
| Silent Check | Standard |
| Seat Material | Buna-N |
| Seal Material | Buna-N |
| Disc Material | Cast Iron |
| Spring Material | 316 Stainless Steel |
| Operating Temperature - Minimum | -20 °F |
| Operating Temperature - Maximum | 100 °F |
| Overall Length | 6.875 in |
| For Media | Process Piping |
| Connection Size - Side 1 | 4 in |
| 3-A Compliance | Not Rated |
| ANSI Flange Class | Class 125 |
| Includes Counterweight | No Counterweight |
| Check Mechanism | Double Disc |
| Mounting Orientation | Horizontal, Vertical |
| Connection Type - Side 1 | Flange |
| Connection Type - Side 2 | Flange |
| Valve Body Style | Inline |