Philadelphia Safety Devices (PSD) began in 1975.  We are American made and have thousands of installations globally.   With a clientele base ranging from Anheuser-Busch to Xerox-Ireland, we have a high success rate for durability and service from one coast to another.

PSD Safety Doors Protect Your Equipment and Personnel Against Dangerous Overpressures that can cause Explosions.

• A PSD explosion relief device is a real, reclosable door.
• A PSD door maintains a positive seal until it opens under precise and predetermined pressure conditions.
• Activation range from a VERY low opening pressures starting from 6″ Water Column (0.22 psi) to a maximum of 30″ Water Column (1.09 psi).
• Once opened it remains open until you close it – like a door, with no tools.
• Time consuming rupture disk replacement is eliminated, minimizing process down time.
• PSD Doors are engineered to meet the requirements of your process and vessel configuration.
• PSD Doors are designed to the latest NFPA 68 or FM standards to minimize the effects of overpressures causing explosions.

Designed and made in the USA since 1975, PSD Doors have been the reclosable safety Door of choice for many customers in many industries worldwide.