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Kingston 1/4″ Brass Soft Seat Safety Valve (20 PSI, 27 SCFM)

$15.90 on Amazon.com (as of October 17, 2026, 2:43 PM EST) View details ↗

The Kingston KSV25 is a precision-machined, ASME-certified safety pressure relief valve designed for small air systems. Built with a durable all-brass construction and a resilient silicone disc, it delivers a bubble-tight seal below reseating pressure while maintaining high flow capacity. This low-profile valve is preset at 20 PSI with a 27 SCFM flow rate, making it ideal for applications requiring reliable protection against overpressure.

Engineered for versatility, the Kingston KSV25 operates efficiently in temperatures ranging from **-20°F to 400°F**, ensuring performance in both cold and high-heat environments. The valve meets API 527 seat tightness standards and features a 1/4″ NPT connection (0.540″ outside thread diameter). Made in the USA, this valve combines precision manufacturing with robust durability for industrial pneumatic systems.

Pressure Rating20 PSI
Flow Rate (SCFM)27
MaterialAll-Brass
Seat MaterialSilicone Disc
Thread Type1/4″ NPT (0.540″ OD)
Temperature Range-20°F to 400°F
What standards does this valve meet for seat tightness?
The Kingston KSV25 complies with the **API 527 seat tightness standard**, ensuring a reliable seal below reseating pressure.
Can this valve be used in extreme cold or high-temperature environments?
Yes, it operates effectively from **-20°F to 400°F**, making it suitable for a wide range of industrial conditions.
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