Ball Drip Valves: What You Need To Know + Options
Ever wondered how fire departments keep their connections dry and ready for action? The answer lies in a humble yet crucial component: the ball drip valve.
Ball drips are specialized brass valves designed to combat moisture accumulation within fire department connections. These valves, equipped with NPT threads, are strategically installed horizontally on the dry side of the connection. Their primary function is to work in tandem with an approved check valve to prevent moisture buildup, ensuring the system's readiness and longevity. These valves are available in ½ or ¾ inch sizes, designed for installation with siamese connections or wall hydrants, automating the draining of the line between the check valve and the exterior wall. Installation is strictly horizontal to ensure proper function. Draining begins at a pressure of just 2.89 psi (2 meters water gauge). Constructed from forged brass and incorporating stainless steel ball bearings, these valves are built for durability and reliability. The design includes NPT male threads on each side for easy integration into existing systems.
Beyond fire protection, ball drip valves find critical application in drip irrigation systems. Here, they are indispensable for maintaining consistent water pressure, curbing water waste, and promoting efficient irrigation practices. The valve's chief responsibility is to allow unrestricted water flow when needed, while also preventing backflow when the system shuts down or pressure diminishes, thus safeguarding the integrity of the irrigation process.
| Feature | Description |
|---|---|
| Type | Mechanical Valve |
| Material | Forged Brass with Stainless Steel Ball Bearing |
| Function | Prevents moisture accumulation and backflow |
| Application | Fire Department Connections, Drip Irrigation Systems |
| Thread Type | NPT (National Pipe Thread) |
| Installation | Horizontal Position Only |
| Draining Pressure | 2.89 psi (2 m wg) |
| Sizes Available | 1/2 inch, 3/4 inch |
| Models | Model 235 ball drip valve, Model 200 strainer series |
| Additional Components | Steel Plug, Brass Plug, Solid Cap (for strainers) |
| Other Valves | O S & Y valves, Model 70p high-pressure indicator, Model 90 wafer check valve, Model 90wbd wafer check valve |
| Lead-Free Options | Bdvlf brass ball drip valve |
| Pressure Rating (Bdvlf) | 200 psi |
| Thread Standard (Bdvlf) | ANSI/ASME B1.20.1 |
| Operation | Gravity returns ball to open position when water flow stops |
| Drain Outlet Size | ¼” NPT |
| Note | Valve is not designed to shut completely; will continue to drip when pressurized. |
| Reference | Example Valve Company (Replace with an actual valve manufacturer's website) |
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