Second-Stage Demand Valve
AssemblyDelivers air to the mask only when the wearer inhales, holding a slight positive pressure. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Second-Stage Demand Valve parts and their functions
7 top-level parts · 7 parts in total · full bill of materials below
| # | Part | Qty | What it does |
|---|---|---|---|
| 1 | Demand Valve Body | 1× | |
| 2 | Demand Diaphragm | 1× | Sensing diaphragm |
| 3 | Coil Spring | 1× | Positive-pressure spring |
| 4 | Bypass / Purge Valve | 1× | Manual purge/bypass |
| 5 | Demand Valve Cover | 1× | |
| 6 | Mask Coupling | 1× | Quick-connect to mask |
| 7 | O-Ring Set | 1× | Set of elastomer rings seated in grooves to seal static or slow-moving joints against fluid and gas, sized to ISO 3601. |
3D model
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Bill of materials for Second-Stage Demand Valve
7 top-level lines · 7 rows shown · 7 parts total · indented to 3 levels| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Demand Valve Body | scba-demand-valve-body | 1× | 1 | · | part |
| 2 | Demand Diaphragm | scba-demand-diaphragm | 1× | 1 | · | part |
| 3 | Coil Spring | coil-spring | 1× | 1 | · | part |
| 4 | Bypass / Purge Valve | scba-bypass-valve | 1× | 1 | · | part |
| 5 | Demand Valve Cover | scba-demand-cover | 1× | 1 | · | part |
| 6 | Mask Coupling | scba-mask-coupling | 1× | 1 | · | part |
| 7 | O-Ring Set | oring-set | 1× | 1 | · | part |
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Where the second-stage demand valve is used
1 product across 1 domain contain it, directly or inside a sub-assemblyUsed in 1 assembly
Sourcing: possible vendors
Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $5–$2k. How estimates work| Vendor | HQ | Specialty | MOQ | Lead time |
|---|---|---|---|---|
| kbl.co.in ↗ | Pune, IN | Pumps & fluid systems | 200 units | 6–10 wks |
| leo.com.cn ↗ | Taizhou, CN | Pumps | 200 units | 6–10 wks |
| shaktipumps.com ↗ | Pithampur, IN | Pumps | 200 units | 6–10 wks |
| cnppumps.com ↗ | Hangzhou, CN | Pumps | 200 units | 6–10 wks |
| rotopumps.com ↗ | Noida, IN | Pumps | 200 units | 6–10 wks |