Synthetic fiber packing is engineered sealing material made from man-made fibers, often combined with lubricants and other additives. It is used to prevent leakage of fluids in pumps, valves, mixers, and other industrial equipment operating under various temperatures, pressures, and chemical conditions. These packings are known for their durability, chemical resistance, and adaptability to harsh environments.
Our synthetic fiber packing is manufactured to meet rigorous international standards. Below are the detailed specifications and performance characteristics.
| Property | Typical Value | Test Method |
|---|---|---|
| Density | 1.2 - 2.0 g/cm³ | ASTM D3800 |
| Tensile Strength | 100 - 300 MPa | ASTM D2256 |
| Temperature Range | -100°C to +300°C | ASTM E831 |
| pH Range | 2 - 12 | In-house testing |
| Compression Set | < 15% | ASTM F36 |
Synthetic fiber packing is utilized across multiple industries due to its versatile properties.
What is the maximum temperature synthetic fiber packing can withstand?
The maximum continuous operating temperature for most synthetic fiber packings is around 300°C (572°F). However, this can vary based on the specific fiber type and lubricants used. For example, graphite-based packings may handle higher temperatures, while PTFE-based ones have a lower threshold. Always check the manufacturer's specifications for the exact product.
How do I select the right synthetic fiber packing for my application?
Selection depends on several factors: the fluid being sealed (chemical compatibility), operating temperature and pressure, shaft speed, and equipment type. For aggressive chemicals, aramid or PTFE packing is often recommended. For high-temperature steam, graphite packing is suitable. Consulting with a technical expert or referring to the product data sheet is advised.
Can synthetic fiber packing be used in food-grade applications?
Yes, certain synthetic fiber packings, particularly those made from FDA-approved PTFE or other compliant materials, are suitable for food and beverage processing. They must not contaminate the product and should meet relevant standards like FDA 21 CFR or EU 10/2011.
What is the typical service life of synthetic fiber packing?
Service life varies widely based on operating conditions, including pressure, temperature, shaft speed, and alignment. Under normal conditions, with proper installation and maintenance, synthetic fiber packing can last from several months to over a year. Regular inspection and adjustment can extend its life.
How should synthetic fiber packing be installed?
Installation involves cleaning the stuffing box, cutting the packing rings to the correct size (using a mandrel or the shaft itself), and staggering the joints by 90 degrees. The packing should be tightened gradually and evenly, allowing for a run-in period. Over-tightening can cause excessive heat and wear.
Is synthetic fiber packing reusable?
Generally, synthetic fiber packing is not reusable once it has been compressed and used in service. Removing it typically damages the structure. It is recommended to replace with new packing during maintenance to ensure optimal sealing performance.
What maintenance is required for synthetic fiber packing?
Regular maintenance includes checking for leaks and adjusting the gland follower bolts as needed to maintain a slight leakage for lubrication and cooling. Periodic inspection for wear and re-tightening helps prevent sudden failure. The packing should be replaced if it shows signs of excessive wear or hardening.
Can synthetic fiber packing handle abrasive slurries?
While synthetic fiber packing is generally non-abrasive, it can be used with abrasive slurries if the packing material is selected appropriately. Packings with lubricants like graphite or PTFE can reduce friction. However, in highly abrasive services, additional flushing or alternative sealing methods might be necessary to prevent rapid wear.
