The Castair Full Flow Ball Valve BV25 is a 1/4" NPT female threaded ball valve for compressed air systems. At $11.86, it is the smallest and most affordable valve in the Castair BV series, sized for 1/4" NPT lines used in pilot connections, drain valve outlets, instrumentation taps, and small auxiliary air lines on Castair compressor installations.
Where 1/4" Valves Are Used
A 1/4" NPT shutoff valve shows up in several places on a reciprocating compressor system. Pilot valve connections are typically 1/4" NPT. Pressure gauge taps, condensate drain lines, and auxiliary ports on aftercoolers and filters often use 1/4" NPT connections. The BV25 gives you a positive, positive-shutoff valve at any of these points — a 90-degree turn of the handle takes the line from full flow to fully isolated.
The full-flow design means the bore through the ball matches the 1/4" pipe ID. At this pipe size, the difference between full-flow and reduced-bore is less significant than at larger sizes, but the full-flow valve still offers better flow characteristics and easier maintenance access when the valve body needs to be serviced.
Technical Specifications
- SKU: BV25
- Connection Size: 1/4" NPT Female (both ends)
- Valve Type: Full Flow Ball Valve
- Price: $11.86
- Manufacturer: Cast Air (Castair)
- Category: Accessories
Key Features
- 1/4" NPT Female Connections: Fits standard 1/4" NPT pilot, drain, gauge, and auxiliary ports on compressed air equipment
- Full Flow Design: Full-port ball bore — matches pipe ID for minimum flow restriction
- Positive Shutoff: Quarter-turn handle — fully open or fully closed with no in-between leakage positions
- Compact Size: Small enough to fit in tight plumbing locations common on compressor manifolds and aftercooler connections
Applications
- Pilot valve isolation on Castair compressor unloader systems (1/4" NPT pilot ports)
- Condensate drain valve on aftercoolers and moisture separators
- Pressure gauge isolation valves — shut off the gauge for replacement without taking the system down
- Auxiliary air line shutoff for 1/4" NPT supply connections to instrumentation or low-demand tools
BV Series Complete Range
Castair BV full-flow ball valves cover 1/4" through 1-1/2" NPT: BV25 (1/4", $11.86), BV100 (1", $40.66), BV125 (1-1/4", $57.60), BV150 (1-1/2", $81.31). Match the valve size to your line or port size. Call 866-217-0063 if you need help selecting the right size for your application.
Why Buy From OEM Diagnostic Tools?
We have been supplying compressor parts and accessories to shops and industrial buyers since 2016. We stock Castair ball valves in all standard sizes. Free shipping on qualifying orders, full manufacturer warranty, and direct support at 866-217-0063.
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