Vacuum line threaded fittings typically operate under low negative pressure (vacuum) and light vibration. The primary requirement is creating an airtight seal to prevent leaks, which would compromise the vacuum integrity. Since these fittings are often part of a readily serviceable system (like HVAC or small process controls), the bond must be Low Strength to allow for easy, non-destructive disassembly.
INCURE ProGrip™ 209 Hydraulic & Pneumatic Thread Sealant
While not explicitly labeled “Low Strength,” the INCURE ProGrip™ 209 is designed for lower-pressure systems (pneumatics) where serviceability is key. Its specific formulation for hydraulic and pneumatic lines makes it the ideal functional Low Strength choice for creating an airtight seal while remaining easy to dismantle.
| Key Feature | Performance for Vacuum Line Fittings |
| Functional Low Strength | Provides a secure, airtight seal against vacuum without seizing the joint. Allows for easy, non-destructive disassembly using hand tools. |
| Sealing Capability | Optimized for creating reliable seals in low-pressure gas/air lines, perfectly suited for maintaining vacuum integrity. |
| Temperature Range | Excellent temperature resistance (typically up to 150∘C), well above the requirements for most vacuum systems. |
| Max Thread Diameter | Suitable for a wide range of fittings, ensuring versatility for different vacuum line sizes. |
Application Steps: Sealing Vacuum Line Threaded Fittings
For maximum reliability and ease of service, follow these steps:
- Preparation: Clean both the male and female threads thoroughly to remove all oil, grease, and residue. Use an appropriate cleaner (e.g., acetone) and wipe dry.
- Application: Apply a continuous, thin bead of ProGrip™ 209 around the male thread, skipping the first thread. Ensure full coverage over the engaged threads.
- Assembly: Immediately thread the fitting into the port and tighten to the manufacturer’s specified torque.
- Curing: Allow the sealant to fixture before applying vacuum (typically 15-30 minutes), and allow a full 24 hoursto reach maximum strength before long-term service.