Float Drain Valves

Common drain valve types include float-operated valves, ball valves, gate valves, and solenoid-actuated valves. Float-operated drain valves use a buoyant float ball to mechanically trigger opening or closing based on liquid level, making them ideal for sump pumps, steam traps, and vacuum tank shutoff applications.

Float balls used in drain valve assemblies are typically manufactured from 304 or 316 stainless steel for corrosion resistance and durability. 316ss is preferred for chemical or highly corrosive environments, while 304ss suits general industrial and food processing applications. Other materials are available upon request for specialized needs.

Yes, float balls can be manufactured with custom magnet integration for precise level detection in complex drain valve systems. Magnets are sourced and assembled inside the float during production, enabling non-contact sensing that works reliably even in sealed tanks, vacuum systems, or corrosive liquid environments.

Round float balls are available from 1-1/2" to 14" in diameter, while oblong floats range from 2 x 6" up to 9 x 14" with various NPT and UNC thread fittings. Custom sizes outside these standard ranges can also be manufactured to match specific drain valve housing requirements.

Yes, float balls intended for drain valve applications are pressure-tested using dedicated equipment to meet custom specifications. This ensures each float maintains structural integrity and buoyancy performance under high-pressure conditions found in vacuum tanks, steam traps, and industrial process control systems.

Float balls can be tapped with virtually any thread specification, including common sizes like 1/4-20, 3/8-16, 1/4 NPT, 3/8 NPT, 1/2 NPT, 5/8-11 UNC, and 3/4 NPT. Through-tube configurations for rod-mounted floats and custom fittings are also available to match specific drain valve assemblies.