DKB - Ball Flow Indicator

Made in USA Ball Flow Indicator

The KOBOLD DKB ball type flow indicator delivers reliable visual flow verification. It is designed with a no-wear mechanical principle that eliminates common failure points found in traditional flow indicators with rotating components that degrade over time. The DKB utilizes a simple ball that lifts when flow is present and settles when flow stops. This straightforward design ensures consistent performance throughout the product's service life, reducing maintenance requirements and eliminating the need for periodic component replacement.

Superior Visibility for Immediate Flow Verification

The domed borosilicate sight glass provides 360-degree visibility when viewing from above, allowing operators to verify flow status at a glance. This full-view design is particularly valuable in installations where the indicator may be viewed from different positions or where multiple indicators need to be monitored simultaneously. The highly visible ball movement provides immediate confirmation of flow presence without requiring electrical connections or digital displays.

Engineered for Horizontal Flow Applications

The DKB is specifically designed for horizontal installation in flow systems. The indicator operates effectively across a range of flow rates, with six available sizes accommodating different pipe dimensions from 1/8" to 1".

Two material combinations address different operating environments. The brass housing of both configurations provides durability and corrosion resistance. The DKB-31 series features a POM (polyoxymethylene) ball with EPDM seals for standard applications, while the DKB-32 series uses a PTFE ball with FKM seals for enhanced chemical resistance. Both configurations maintain the same no-wear advantage and visual monitoring capability.

Technical Specifications and Performance Parameters

The DKB operates at pressures up to 87 PSIG and temperatures up to 248°F. The compact design integrates directly into pipe runs without requiring significant installation space. Flow ranges vary by size, with the largest 1" model accommodating up to 27 GPM or 88 SCFM. The pressure drop at the maximum rated flow is typically 15 PSI across all sizes, allowing the indicator to be installed without significantly impacting system performance.

The borosilicate sight glass resists thermal shock and provides clear visibility even in demanding industrial environments. The brass housing delivers corrosion resistance suitable for manufacturing facilities, processing plants, and outdoor installations with environmental exposure.

Economical Flow Monitoring Solution

The DKB provides a cost-effective alternative to electronic flow sensors or complex measurement instruments when basic flow verification is the primary requirement. For applications where operators need to confirm flow presence rather than measure precise flow rates, the DKB delivers reliable indication at an economical price point. The absence of wear components eliminates ongoing maintenance costs associated with rotating flow indicator designs.

Installation is straightforward using standard NPT pipe threads. The mechanical operation needs no electrical connections, simplifying installation in locations where power access is limited.

Applications Across Industrial Sectors

The DKB ball flow indicator serves flow verification in a variety of liquid and air applications. The DKB is used to ensure that cooling water flow is maintained to process equipment, to show the presence of flow in condensate return lines, or to help operators detect color or condition changes of liquids during operation. The DKB is also suitable for low pressure air applications and is used by manufacturing facilities to monitor air supply to production equipment, by processing plants to verify cooling air flow, and by municipal water and wastewater treatment facilities for aeration system monitoring.

The DKB is manufactured in the United States and qualifies for Build America, Buy America Act (BABA) compliance. This domestic manufacturing qualification makes the DKB an ideal solution for projects requiring American-made products.

Reliable Performance Through Simple Design

The simple operating principle of the DKB eliminates complexity that can lead to failure in more sophisticated instruments. The ball float design ensures long term reliability and dependable indication year after year without the deterioration common in devices with bearings, bushings, or rotating elements.

Common Questions about Sight Flow Indicator with Ball