Grooved Coupling Gasket
High-performance grooved coupling gaskets ensure leak-proof connections in mechanical pipe joints. Engineered for fire protection, HVAC, and industrial pipelines, our UL/FM-certified EPDM, NBR, and PTFE gaskets withstand pressures up to 300 PSI (Class 150) and temperatures from -40°C to +150°C.
Why Grooved Coupling Gaskets Matter?
Critical Roles in Modern Piping Systems
✅ Vibration Dampening Design
EPDM elastomer grooved gaskets absorb pipeline vibrations caused by pumps, compressors, or seismic activity, making them ideal for flexible grooved couplings in earthquake-prone areas. Key features:
- Dynamic load capacity: ±5mm lateral displacement (per ISO 16135)
- Fatigue resistance: 1 million cycles at 15Hz (ASTM D5994)
✅ Quick-Seal Installation
Pre-inserted gaskets reduce joint assembly time by 3x compared to welded flanges:
- No curing/waiting time – Immediate pressure testing (ASME B31.1)
- Tool-free installation – Compatible with rigid grooved couplings
- Zero downtime maintenance – Replace gaskets without pipe cutting
✅ Media Compatibility
| Material | Chemical Resistance | Standards |
|---|---|---|
| EPDM | Water, Steam, Mild Acids (pH 3-11) | UL 213, NSF 61 |
| NBR | Fuels, Lubricants (ASTM Oil No.1-3) | FM 1680, API 6A |
| PTFE | Strong Acids/Alkalis, Solvents | FDA 21 CFR, NACE MR0175 |
Example applications: EPDM for fire sprinklers | NBR for oil pipelines | PTFE for chemical plants
| Material | EPDM | NBR | PTFE |
|---|---|---|---|
| Temperature Range | -40°C ~ +150°C | -30°C ~ +100°C | -70°C ~ +260°C |
| Pressure Rating | Class 150 | Class 125 | Class 300 |
| Certifications | UL 213, NSF 61 | FM 1680 | FDA 21 CFR |
High-Quality Custom pipe fittings for Various Industrial Applications
EPDM for fire sprinklers
UL 213-certified EPDM gaskets withstand 150°C water/steam in fire sprinklers, ensuring 300 PSI leak-proof joints per NFPA 13.
NBR for oil pipelines
FM 1680-approved NBR seals resist ASTM Oil No.3 at 100°C, ideal for refinery pipelines with H₂S ≤500ppm (NACE MR0175)
PTFE for chemical plants
FDA-compliant PTFE gaskets handle 98% H₂SO₄ and 40% NaOH at 260°C, meeting API 6A for acid transfer systems.
Selecting the Right Gasket for Your System
Identify Operating Conditions
→ Choose UL 213 EPDM gaskets for sprinkler networks
→ Use FDA PTFE gaskets for sanitary pipelines
→ Select NBR with FM 1680 approval
Match Groove Type
Rigid Couplings
Standard thickness gaskets
3.2±0.2mm
Flexible Couplings
Shock-absorbing thick gaskets
4.8±0.3mm
Dimensional Verification
Groove Width
(ASTM F1476 Standard)
Compression Rate
(ISO 4633 Requirement)
FM Approved Coupling Seals require annual recalibration per NFPA 13.
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