🛡️Pneumatic Dual Safety Valve – ROSS J3573 Series (Crossflow)

Brand: ROSS Controls | The Global Standard for Press Machine Safety
Dual Safety and Fault Monitoring Solution — Maximum protection for operators and equipment.

📘Introduction to ROSS J3573 Dual Safety Valve

The ROSS J3573 Series pneumatic dual safety valve, part of the renowned Crossflow series, is the globally recognized solution for controlling Air Clutch & Brake systems on mechanical presses requiring the highest level of safety. Established in 1921, ROSS Controls is a leading manufacturer with extensive experience in pneumatic controls.

The core of the ROSS J3573 valve is a parallel dual valve structure that operates synchronously. This design ensures that, even if one valve element fails (e.g., fails to close on de-energization), the other element continues to operate normally to exhaust all pneumatic pressure from the clutch/brake, bringing the machine to an immediate and safe stop. This fault can be detected by the continuous leakage of air through the exhaust port when the valve is de-energized.

ROSS J3573 Series

✨Key Features

• ✓Dual Safety (Dual Valve Design): Two valve elements operate in parallel, ensuring safety even in the event of a single fault.
• ✓Extremely Fast Response: The Crossflow design optimizes airflow, allowing for very fast response times (both pressurizing and exhausting), even if one valve fails. Helps achieve precise stopping angles.
• ✓Multiple Monitoring Options: Offers various monitors/sensors to detect faults and prevent restart:
  • EP Monitor: Electro-pneumatic monitoring with lockout and fault memory, requires reset.
  • Pressure Switches: Uses 2 pressure switches, requires external monitoring circuit.
  • (See also the DM²® Series for a comprehensive dynamic monitoring solution, integrated memory, and PL e compliance.)
• ✓Wide Size Range: Available in port sizes from 1/2" to 1-1/2" for the J3573 series, accommodating a wide range of press sizes.
• ✓Repairable: ROSS valves are designed to be maintained and overhauled, extending service life.
• ✓Various Options: Includes high-performance silencers, exhaust flanges, status indicators, external pilot options.

🔍Why is Dual Valve Fault Monitoring Necessary?

Although a dual valve fault can be detected by the sound of air leaking from the exhaust port, in a noisy industrial environment or when the valve is mounted in a high location, this detection becomes difficult.

Monitors or sensors, whether integrated or added on, help to quickly and automatically detect asynchronous faults between the two valve elements.

• Monitor: Integrates a Lockout/Restart Prevention function when a fault is detected. The valve will be locked in a safe state until it is reset (manually or electrically).
• Sensor: Only monitors and outputs a fault signal externally; it requires a separate control circuit to process the signal and implement the safety lockout.

The J3573 series offers the option of an integrated EP Monitor (with lockout function) or Pressure Switches (requiring an external circuit).

📋General Specifications (J3573 with EP Monitor)

(For detailed Cv, response constants M & F, dimensions, and weight for each J3573Axxxx model, please refer to the catalog)

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