MAMAC Systems EP-350 Fail Safe

The MAMAC Systems EP-350 is a high-performance electropneumatic fail-safe device designed to protect pneumatic control systems during power loss. Engineered for seamless integration with EP-311/313 electropneumatic transducers, the EP-350-MAMA utilizes a precision floating poppet solenoid to maintain pressure stability. Upon losing the 24 Vac/Vdc supply voltage, the device triggers a fail-safe bleed to zero pressure, exhausting all connected branch ports to prevent equipment damage or process instability. The unit features a rugged aluminum block manifold equipped with four 1/4" brass hose barbs, allowing a single fail-safe to support multiple pneumatic outputs. To ensure signal integrity, each pneumatic port is fully isolated, effectively prohibiting pressure mixing between separate control loops. Built on a 16-gauge steel bracket with a durable enamel finish, this industrial pneumatic manifold is an essential component for contractors seeking a reliable power failure pressure exhaust solution in commercial HVACR applications.

• Multi-Transducer Support: Consolidate your system by managing up to four EP-311/313 pneumatic transducers with a single fail-safe unit.
• Voltage Versatility: Field-ready compatibility with 24 Vac/Vdc supply voltage (18-28V range) for flexible installation across various controller platforms.
• Zero Leakage Manifold: The aluminum block manifold and brass barb connections provide a robust, leak-resistant pneumatic interface.
• Signal Protection: Internal port isolation prevents cross-talk and pneumatic pressure mixing, maintaining the accuracy of individual branch lines.
• Compact Steel Construction: The 16-gauge steel bracket and small footprint allow for easy mounting within crowded control panels.

How does the EP-350 handle multiple branch lines?
The unit utilizes an integrated manifold with four separate 1/4 inch brass hose barbs. These ports are internally isolated to ensure that pressure from one transducer branch cannot bleed into or affect the pressure of another connected line.

What happens to the pneumatic system when power is restored?
When the 24V supply is re-applied, the floating poppet solenoid closes the bleed port. This allows the connected EP-311 or EP-313 transducers to resume normal operation and restore branch line pressure as commanded by the controller.

Can I use this with transducers from other manufacturers?
While technically a solenoid bleed valve, the MAMAC EP-350 is specifically engineered and optimized to interface with the EP-311/313 series to ensure a controlled bleed to zero pressure. For non-MAMAC equipment, verify flow rates and port compatibility before installation.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.