Leak Prevention with Adjustable Stem Packing for Reliable Operation
Bray Series 51 brass, threaded ball valves are the ideal commercial utility valve for low-pressure applications. Series 51 threaded ball valves offer simple quarter-turn operation, low operating torque and a bubble-tight seal, making them an excellent choice for a wide range of general service applications, including: Water, Steam, Oil and Compressed gases.
Series 51 features a two-piece brass body design that simplifies maintenance and repair with a threaded closure manufactured with deep grooves, ensuring a tight seal. This feature enhances the reliability of the valve in various applications. The bottom entry blowout proof stem prevents stem ejection under line pressure.
Series 51 threaded ball valves feature a full port design with a hard chromium-plated brass ball that, maximizes flow and extends valve service life. The adjustable stem packing seals prevent media leakage through the stem, maintaining the integrity of the system.
With Bray’s industry-leading warranty, reputation for reliability, and service after the sale, Bray Series 50 three-piece threaded ball valves offer an exceptional value in a wide variety of commercial and industrial flow control applications.
The Series 51 valves come equipped with vinyl insulated handles, providing comfortable operation and protecting the user from heat and cold.
Specification / Detail
| Size Range | ¼ to 4" (8 to 100mm) |
| Body Materials | Brass |
| Temperature Range | -50°F to 400°F (-46°C to 200°C) |
| Stem Materials | Brass |
| Maximum Allowable Operating Pressure | ¼ to 2" 600psi WOG, 150psi WSP 2½ to 4" 400psi WOG, 150psi WSP |
| Seat Materials | PTFE |
| Shutoff Rating | Zero Leakage |
| Ball Materials | Chrome Plated Brass |
| Body Style | Two Piece |
| Design Standard | MSS SP-110 |
| End Connections | Threaded ASME B1.20.1 NPT |
| Testing Standard | MSS-SP72 |
| Ports | Full Port |
| Face to Face | Manufacturers Standard |
| Applications | General Service (Oil, Water, or Steam), Compressed Gases |

