The Norgren XSz8 is a 3/2-way solenoid pilot-operated pneumatic safety dual valve designed primarily for clutch and brake control systems on mechanical power presses. It features self-monitoring functionality that dynamically checks the actuation time difference between both valve elements on every switching cycle — if the time difference exceeds 0.5 seconds, the valve immediately blocks pressure output and exhausts to atmosphere. With a G1/4 port connection, operating pressure range of 3-10 bar, and IP65 protection rating, it delivers intrinsic safety without requiring an external electrical monitoring unit. Certified to DIN EN ISO 13849-1 Performance Level "e" (Category 4) and compliant with EN 692, EN 954-1, DGUV, OSHA, CSA, and SUWA standards. The aluminum body with PUR/NBR seals ensures reliable operation in compressed air systems with filtration to 50 μm. Typical applications include mechanical press clutch/brake systems and other 3-way safety-critical pneumatic functions.
Q: What is the primary application of the Norgren XSz8?
The XSz8 is primarily used as a safety dual valve for pneumatic clutch and brake control systems on mechanical power presses and other safety-critical 3-way pneumatic applications.
Q: What safety certification level does the XSz8 achieve?
It achieves Performance Level "e" (Category 4) per DIN EN ISO 13849-1, the highest safety level for pneumatic control systems.
Q: Does the XSz8 require an external monitoring unit?
No, the XSz8 features built-in dynamic self-monitoring. It detects valve element timing differences >0.5 seconds and automatically exhausts pressure without external controllers.
Q: What happens if power is lost to the XSz8?
The valve is intrinsically fail-safe — upon power loss or internal fault detection, it immediately blocks pressure output and exhausts the downstream circuit to atmosphere, ensuring zero residual pressure in the protected system.
Q: What air quality is required for proper operation?
The compressed air must be filtered to ≤50 μm, and can be either lubricated or non-lubricated. Recommended filter elements should be used upstream.
Q: What are the available electrical voltage options?
Common voltage options include 24 V DC and 120 V AC. Verify the specific sub-model number (e.g., 2492806305202400 for 24 V DC, 2492807305312060 for 120 V AC).
Q: Can the XSz8 be installed in any orientation?
The preferred mounting orientation is vertical with the solenoid coil on top, ensuring proper drain and reliable actuation.
Q: What is the lead time for XSz8 safety valves?
Lead time is approximately 56 working days from the Norgren factory, though inventory may be available through distributors.
