Graphite PTFE packing is a high-performance sealing solution designed for demanding industrial applications. Combining the exceptional properties of graphite and PTFE (Polytetrafluoroethylene), this packing material offers superior thermal stability, chemical resistance, and low friction. It is widely used in pumps, valves, and other equipment where reliable sealing under extreme conditions is essential. The unique blend of materials ensures long service life and reduced maintenance costs, making it a preferred choice for industries such as chemical processing, oil and gas, and power generation.
Below is a detailed table outlining the technical specifications of Graphite PTFE packing. These parameters are critical for selecting the right product for specific applications.
| Parameter | Value | Unit |
|---|---|---|
| Density | 1.8 - 2.2 | g/cm³ |
| Tensile Strength | 15 - 25 | MPa |
| Compression Set | 10 - 20 | % |
| Thermal Conductivity | 5 - 10 | W/m·K |
| pH Range | 0 - 14 | - |
| Maximum Pressure | 200 | bar |
| Standard Sizes | 3mm to 25mm | mm (cross-section) |
What is Graphite PTFE packing used for?
Graphite PTFE packing is primarily used for sealing applications in equipment like pumps and valves, where it prevents leakage of fluids and gases under high temperatures and corrosive conditions.
How does Graphite PTFE packing compare to other packing materials?
It offers better thermal stability and chemical resistance than traditional materials like asbestos or rubber, with lower friction and longer lifespan, reducing downtime and maintenance.
Can Graphite PTFE packing be used in food-grade applications?
Yes, it is non-toxic and compliant with FDA standards, making it suitable for food, beverage, and pharmaceutical industries where hygiene is critical.
What is the temperature range for Graphite PTFE packing?
It operates effectively from -200°C to 300°C (-328°F to 572°F), making it ideal for both cryogenic and high-temperature environments.
How do I install Graphite PTFE packing?
Clean the shaft or stem thoroughly, cut the packing to size with a sharp tool, stagger the joints during installation, and tighten the gland evenly to avoid over-compression, which can cause wear.
Is Graphite PTFE packing reusable?
In most cases, it can be reused if removed carefully and inspected for damage, but it's often recommended to replace it during maintenance for optimal performance.
What maintenance is required for Graphite PTFE packing?
Regular inspection for leaks and wear, occasional tightening of the gland follower, and lubrication if specified by the manufacturer, though it is generally self-lubricating.
Does Graphite PTFE packing require run-in time?
Yes, a short run-in period is needed to allow the packing to seat properly against the shaft, during which slight leakage might occur before it forms a tight seal.
Can it handle abrasive fluids?
While it has good resistance, highly abrasive fluids may require additional protective measures or more frequent packing replacement to prevent accelerated wear.
Where can I buy Graphite PTFE packing?
It is available through industrial suppliers, OEM parts distributors, and online stores specializing in sealing products; ensure to specify the size and application requirements.
