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Sealing gaskets for ISO parallel (G) and metric threads: PRS bonded seals (SS 316 or carbon steel ring with FKM or Buna-N), PRP copper rings for external threads and PRG copper rings for internal threads (SS 316 and PTFE on request). 1/8" to 2" and M8 to M48.
ATEX / IECEx documentation supplied where stated
Incoterms agreed in each quotation
Price, lead time and certificates in every offer
Cylindrical threads to DIN ISO 228/1 are sealed by metal to metal contact or with a dedicated sealing gasket. PANAM supplies three gasket families matched to the thread end forms used on its tube and pipe fittings.
PRS gaskets seal external parallel threads (RS form) with an FKM or Buna-N inner ring bonded to a stainless or carbon steel outer ring. PRP copper rings seal external parallel threads to DIN 3852 Form B (also usable with Form A) and external metric threads to ISO 724. PRG copper rings seal internal parallel threads to DIN 3852 Form Y, sitting on the flat bottom of the internal thread.
Key features
Standard specification
| PRS ISO sizes | 1/8" to 2" (PRS-S-02 to PRS-S-32) |
|---|---|
| PRS metric sizes | M8x1.0 to M48x2.0 |
| PRP ISO sizes | 1/8" to 2" copper |
| PRP metric sizes | M8x1.0 to M48x2.0 copper |
| PRG ISO sizes | 1/4" to 3/4" copper |
| PRG metric sizes | M10x1.0 to M27x2.0 copper |
| FKM temperature | -15 °C to 204 °C (5 °F to 400 °F) |
| Copper temperature | -198 °C to 204 °C (-325 °F to 400 °F) |
| SS 316 / PTFE temperature | -254 to 538 °C (SS) / -54 to 232 °C (PTFE) |
Gasket families
| Family | Thread | Material | Example |
|---|---|---|---|
| PRS | External ISO parallel G (RS) | SS 316 or CS ring with FKM / Buna-N | PRS-S-04 |
| PRS metric | External metric | SS 316 or CS ring with FKM / Buna-N | PRS-S-08M-F |
| PRP | External ISO parallel (RP) | Copper | PRP-CU-04 |
| PRP metric | External metric | Copper | PRP-CU-20M |
| PRG | Internal ISO parallel G (RG) | Copper (SS 316, PTFE on request) | PRG-CU-08 |
| PRG metric | Internal metric | Copper (SS 316, PTFE on request) | PRG-CU-20M |
Codes give gasket type, ring material and thread size. For PRS metric gaskets add the inner ring code (F = FKM standard, B = Buna-N), e.g. PRS-S-08M-F for M8x1.0. For PRG gaskets replace CU with S (SS 316) or T (PTFE) for other materials; PTFE gasket dimensions may differ and should be specified when ordering.
Applications
Sealing of parallel thread ports on tube fittings, valves, manifolds and gauges in instrumentation and hydraulic systems.
Documentation
The manufacturer catalogue with full dimension tables and the ISO certificates of the manufacturer are in the attachments. Indicate the model or part number, size, connections, material, pressure rating and quantity in your quotation request.
Data sheet