Synthetic fiber packing is a type of mechanical sealing material composed of man-made fibers, often combined with lubricants and other additives. It is engineered to provide reliable sealing in pumps, valves, and other industrial equipment where leakage control is critical. Unlike traditional materials like asbestos, modern synthetic fiber packings offer enhanced safety, durability, and performance across a wide range of temperatures and pressures. They are designed to withstand harsh chemical environments, reduce maintenance costs, and extend the lifespan of machinery.
Our synthetic fiber packing products are manufactured to meet international standards, including ISO 9001 and ASTM specifications. Below is a detailed table outlining the key parameters for our standard product line.
| Parameter | Specification | Testing Standard |
|---|---|---|
| Material Composition | Aramid, carbon, graphite, PTFE fibers | ASTM D276 |
| Temperature Range | -100°F to 600°F (-73°C to 316°C) | ASTM E831 |
| Pressure Range | Up to 1500 psi (10.3 MPa) | ISO 15848 |
| pH Compatibility | 2 - 12 | ASTM D543 |
| Density | 1.2 - 1.8 g/cm³ | ASTM D792 |
| Tensile Strength | 10,000 - 15,000 psi | ASTM D3039 |
| Coefficient of Friction | 0.08 - 0.15 | ASTM D1894 |
Synthetic fiber packing is versatile and used in various industries for sealing applications. Common uses include:
Synthetic fiber packing offers several benefits compared to natural fibers or asbestos-based packings:
Proper installation is crucial for optimal performance of synthetic fiber packing. Follow these steps:
What is the maximum temperature synthetic fiber packing can handle?
Synthetic fiber packing can operate in temperatures ranging from -100°F to 600°F (-73°C to 316°C), depending on the specific fiber blend and lubricants used. For extreme temperatures, high-purity graphite or aramid-based packings are recommended.
How does synthetic fiber packing compare to mechanical seals?
Synthetic fiber packing is often more cost-effective for low to medium-pressure applications and allows for adjustable leakage control, whereas mechanical seals provide zero leakage but at a higher initial cost and complexity. Packing is also easier to install and maintain in many field scenarios.
Can synthetic fiber packing be used in food processing equipment?
Yes, certain types of synthetic fiber packing, such as those made with PTFE (Teflon) or FDA-approved materials, are suitable for food and beverage applications. They are non-toxic, resistant to cleaning agents, and comply with industry regulations like NSF/ANSI standards.
What is the typical lifespan of synthetic fiber packing?
The lifespan varies based on operating conditions, but generally, synthetic fiber packing can last from 6 months to several years. Factors like shaft speed, media compatibility, and proper installation significantly influence durability. Regular maintenance checks can extend its life.
How do I choose the right synthetic fiber packing for my application?
Consider the operating temperature, pressure, chemical environment, and shaft speed. Consult the product specifications table and, if needed, request a compatibility chart from the manufacturer. For harsh conditions, custom blends are available to meet specific requirements.
Is synthetic fiber packing environmentally safe?
Yes, modern synthetic fiber packings are designed to be environmentally safe, free from asbestos and heavy metals. Many are recyclable or disposable without hazardous waste concerns, aligning with global environmental standards such as RoHS and REACH.
Can synthetic fiber packing be used in high-speed applications?
Yes, but it requires careful selection. Low-friction materials like carbon-graphite blends are ideal for high-speed shafts, as they reduce heat generation and wear. Always ensure the packing is rated for the specific RPM and consult engineering guidelines.
What maintenance is required for synthetic fiber packing?
Regular inspection for leakage and wear is essential. If leakage increases, slight gland adjustment may be needed. Avoid over-tightening, as it can cause excessive heat and premature failure. Replace packing during scheduled shutdowns based on condition monitoring.
