- PVS-7 / PVS-14Compatible with
- Purge portInstallation location
- Dry nitrogenRetained inside
- A3144316Part number
The sealing ring (O-ring) for the AGM purge screw seals the purge port in the night vision device housing. This keeps the dry nitrogen used to fill the device's interior inside, while preventing moisture and small contaminants from entering the optics. According to the manufacturer, the same O-ring is used in PVS-7 goggles and PVS-14 monoculars, making it easier to source service parts.
PVS-7 / PVS-14
Compatible with
Purge port
Installation location
Dry nitrogen
Retained inside
A3144316
Part number
Key features
- Original AGM Global Vision sealing ring.
- Seals the purge port in the night vision device housing.
- Retains dry nitrogen inside the device.
- Protects the interior from moisture and small contaminants.
- According to the manufacturer, it is used in both the PVS-7 and PVS-14.
- Manufacturer part number: A3144316.
When to replace
The O-ring should be replaced during any service that requires removing the purge screw, such as when re-purging the device with nitrogen, as well as when the seal is cracked or lost. A properly functioning purge port seal helps prevent the interior of the device from fogging up.
Technical specifications
| Manufacturer | AGM Global Vision |
|---|---|
| Model | PVS7 O-ring for purge screw |
| Part number | A3144316 |
| Type | purge screw sealing ring (O-ring) |
| Compatible with | PVS-7, PVS-14 (according to the manufacturer's description) |
| Function | seals the purge port, retains dry nitrogen inside |
Frequently asked questions
Does this O-ring fit the PVS-14?
Yes. The manufacturer states that this ring is used in both the PVS-14 and PVS-7.
What is the purge port used for?
The interior of the housing is filled with dry nitrogen through the purge port. The O-ring seals this port to keep the nitrogen inside and prevent moisture and contaminants from entering.
Can I perform the nitrogen purge myself?
Refilling the device with nitrogen requires the proper equipment. If you do not have experience servicing night vision devices, contact us before purchasing.