Products Description
Welcome to the SCYUNCHENG Technical Support Center. This page provides the official component breakdown, part reference numbers, and installation guide for our CNG/LPG Reducer Repair Kits. Use the exploded diagram and parts list below to correctly identify and replace internal wearing components during pressure regulator maintenance.
1. Reducer Exploded View & Parts Breakdown
Proper maintenance of multi-stage CNG/LPG reducers requires precise replacement of internal diaphragms, seals, and filter elements. Refer to the standard component list below:
| No. | Component Name (English Technical Term) | Function / Application Description |
|---|---|---|
| 1 | 1° - 2° Stage Membrane (Diaphragm) | Regulates primary and secondary gas pressure chambers. |
| 2 | 2° Stage Pad | Sealing pad for second-stage pressure control. |
| 3 | Washer Øi 18 | Sealing washer (Inner diameter 18mm). |
| 4 | Filter Holder Washer | Supports and secures the high-pressure gas filter unit. |
| 5 | Washer Øi 12 | Connection sealing washer (Inner diameter 12mm). |
| 6 | Washer Øi 14 | Inlet/outlet fitting washer (Inner diameter 14mm). |
| 7 | Filter Element | Filters impurities and debris from incoming high-pressure gas. |
| 8 | 1° Stage Valve | Controls initial high-pressure gas reduction stage. |
| 9 | 3° Stage Membrane (Diaphragm) | Final stage low-pressure sensitive diaphragm. |
| 10 | 3° Stage Pad | Final stage valve pad for stable idle flow. |
| 11 | O-Ring 119 Øi 15 | High-pressure sealing O-ring (Inner diameter 15mm). |
2. Maintenance & Installation Guidelines
Safety First: Always close the cylinder manual valve and depressurize the system completely before disassembling the reducer.
Cleanliness: Ensure the inner chambers and valve seats are free from oil residues, dust, or metal particles before installing new diaphragms (Items 1 & 9) and pads (Items 2 & 10).
Seal Replacement: Always replace all matching washers (Items 3, 4, 5, 6) and O-rings (Item 11) simultaneously to prevent gas leakage.
3. Download Technical Resources
Access and download our official documentation and parts reference sheets below:
📄 CNG/LPG Reducer Repair Kit Parts Breakdown & Diagram (PDF)
CNG LPG Reducer Repair Kit & Diaphragm Maintenance Guide.pdf
Need Specific Repair Kits or Bulk Spare Parts?
If you are looking for matching repair kits for your specific reducer models, contact our engineering and sales team directly via WhatsApp: +86 186 2808 8808 or email sales@scyuncheng.com.
