Brass One Eighth Inch NPT Industrial Hard Seat Safety Pressure Relief Valve, 150 PSI Preset, 129 SCFM Flow, Made in USA, -65F To 400F Operating Range, Heavy Duty, Industrial Grade For Pneumatic Systems

Brass 1/8 NPT Safety Relief Valve, 150 PSI preset, single
✔️ Brass hard-seat, 150 PSI preset, 129 SCFM, -65°F to 400°F

This hard-seat brass safety relief valve protects pneumatic systems by venting excess pressure. It's built for industrial air lines, compressors, and other high-pressure equipment where a fixed relief setting is essential.

Dimension	Details
Thread size	1/8" NPT (OD 0.405" / 10.29 mm)
Operating range	-65°F to 400°F
Preset pressure	150 psi
Flow	129 SCFM

✅ Preset at 150 psi with 129 SCFM flow
✅ 1/8" NPT male thread; outer diameter 0.405" (10.29 mm)
✅ Brass body with metal-to-metal seal for harsh environments
✅ Operating range -65°F to 400°F; ASME SRH-series certified
✅ Made in USA; heavy-duty industrial grade

💡 What is a brass hard-seat pressure relief valve used for in industrial pneumatic systems?

In practical terms, it helps prevent overpressure by venting safely at a fixed setting.

• handy for guarding compressors and air lines against overpressure
• provides dependable, fixed relief to protect components and tooling
• built to withstand harsh environments with brass seats and stainless internals