Dispensing Valves

Dispensing valves are crucial mechanical devices used across various industries to precisely and controllably deliver a wide range of fluids and viscous materials. They act as “gatekeepers,” regulating a substance’s amount and flow rate, ensuring accuracy, efficiency, and a clean process.

The basic principle is that a mechanism within the valve opens and closes a passageway for fluid flow. This mechanism can be activated in different ways, leading to various types of valves: pneumatic, hydraulic, and electric. Many dispensing valves also have a “suck-back” or “anti-drip” feature, which pulls back a small amount of material after dispensing to prevent dripping and ensure a clean cutoff.

Common types include:

• Needle Valves: Offer very precise control for fine adjustments, often used for micro-dispensing of low-to-medium viscosity fluids.
• Diaphragm Valves: Use a flexible diaphragm to separate the fluid from the valve’s operating mechanism, making them ideal for handling corrosive or moisture-sensitive fluids.
• Poppet Valves: Multipurpose valves used for dispensing small shots or beads of medium-to-high viscosity materials.
• Jet Valves: A high-speed, non-contact option that “jets” a precise amount of fluid, preventing collisions with the component.
• Positive Displacement Valves: Dispense a specific, volumetric amount of fluid, ensuring high repeatability and accuracy, often used for very thick or high-viscosity materials.