Our Pressure and Vacuum Release Valves (technically a PVRV, however commonly referred to as a PRV) with 2 inch tri-clamp connection is a dual-function mechanical safety device used to protect boiler tanks, and equipment from overpressure and vacuum collapse.
Configured and designed for StillDragon are configured to releasing at 0.05 MPa / 0.5 Bars (approximately 7.24 PSI).
StillDragon boilers are supplied with the intended use of being an open atmosphere system. However should something unexpected happen, such as packing being too tight and blocking the vapour flow, a closed system could result.
For additional peace of mind, you may choose to connect a PRV unit as an extra level of safety.