Pilot Operated Ball Float Valves for Reliable Control

A pilot-operated valve uses a smaller pilot mechanism to control pressure or flow acting on the main valve. This arrangement can allow the main valve to handle larger capacities or operate with less direct force than a purely direct-acting design. In liquid-level applications, a float assembly may provide the position change that helps the pilot mechanism respond as the level rises or falls.

A direct-acting valve opens or closes through a force applied directly to its main sealing element, such as a float linkage, spring, or actuator. A pilot-operated valve uses a separate pilot stage to manage pressure across the main valve, which then performs the primary opening or closing action. Pilot-operated designs are often selected where larger flow capacity or controlled response is needed.

Use a pilot operated relief valve when a system needs accurate pressure control, especially at higher capacities or where operating pressure is close to the set pressure. The pilot senses system pressure and controls the main valve, helping it remain sealed until the set point is reached. Selection should account for fluid properties, pressure range, codes, temperature, and required relieving capacity.

Stainless steel is commonly selected for float valve applications because it provides durable construction for liquid-based systems. Stainless Steel Float Ball Company most commonly supplies 304ss floats, followed by 316ss, with other materials available when required. The best material depends on the liquid, corrosion exposure, temperature, pressure, and compatibility requirements of the complete valve system.

Yes. Float balls can be supplied with custom thread specifications, through tubes, hooks, and other fittings to match a valve mechanism or measurement assembly. Available examples include common NPT, UNC, and machine-thread connections, while custom tapping can be arranged to meet specific requirements. Providing the required connection, dimensions, and application details helps ensure correct integration.

Pressure testing is available for float balls used in applications with elevated or unusual pressure requirements. Testing can be performed to customer specifications, helping verify that the float is appropriate for the intended operating environment. When requesting a tested float, provide the required test pressure, operating pressure, fluid, temperature, and any applicable system requirements so the component can be properly specified.

Round stainless steel float balls are available in multiple stocked sizes, including 1-1/2, 2, 3, 3-1/2, 4, 5, 6, 7, 8, 10, 12, and 14 inches. Oblong floats are also available in a range of dimensions and connection configurations. Custom sizes can be developed for specialized valve assemblies, tanks, and liquid-level control systems.

A tailored supply program can be structured around your inventory, freight, and production objectives. This can include regular access to commonly used float sizes, custom configurations, and direct shipment to support ongoing operations. Share your forecasted usage, required specifications, delivery locations, and stocking preferences so a program can be aligned with your supply needs.