Gas Leak Detector & Valve Proving System Replacements
Critical safety upgrades for discontinued valve proving systems (VPS) and gas detectors.
System-Level Safety Risk
Replacing a Valve Proving System (like Siemens LDU11) is a major safety modification. Modern Burner Management Systems (BMS) often integrate this function directly. Any replacement or retrofit requires re-certification and a formal leak test.
Replacement List
| Brand | Discontinued Model | End of Life | Official Replacement | Key Differences | Interchange? | Action / Advice |
|---|---|---|---|---|---|---|
| Siemens | LDU11.323A17 | Discontinued | System Upgrade Required | No direct plug-and-play. Modern systems integrate valve proving. | No | Upgrade to LMV or similar BMS. Requires OEM approval. |
| Siemens | LDU11.323A27 | Discontinued | System Upgrade Required | Safety critical component. No direct replacement. | No | Consult authorized dealer for a full retrofit plan. |
Priority Procurement & Maintenance Advice
- Siemens LDU11: Since there is no direct replacement, plan for a control system upgrade (e.g., to LMV series) during your next scheduled outage.
- Regulatory Compliance: Ensure any new valve proving solution meets EN 1643 / EN 161 standards.
- Verification: Document all leak test results after installation as part of your safety audit trail.