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 Rating | 20 PSI |
|---|---|
| Flow Rate (SCFM) | 27 |
| Material | All-Brass |
| Seat Material | Silicone Disc |
| Thread Type | 1/4″ NPT (0.540″ OD) |
| Temperature Range | -20°F to 400°F |






