Inquire: 1 (800) 668-0646

Mechanical Packing for Pulp and Paper Applications

By CRGI on

mechanical packing for pulp and paper applicationsCompanies producing pulp and paper products use a wide range of machinery and equipment within their processing facilities to make the final product. Boilers, turbines, heaters, and pumps are used to convert source water into steam, while de-barkers, washers, chippers, digesters and the like process incoming wood materials into pulp. Bleaching equipment is used to produce bleached pulp stock, and refiners and paper machines transform pulp stock into paper.

In virtually every pulp and paper facility, mechanical packing (also known as compression packing) is an integral input for keeping all of this equipment running efficiently and effectively. Choosing the right packing for the right equipment reduces unplanned downtime and maintenance costs. In this blog, we examine two types of mechanical packing that CRG often recommends for pulp and paper applications where abrasive media, or fluids with suspended solids, are often being handled: Teadit styles 2773 and 2774.

Mechanical packing for pulp and paper applications: Style 2773

Style 2773 packing comprises an interbraid cross-section with a proprietary yarn composed of Novoloid and other high-quality synthetic fibers. It is impregnated with PTFE, graphite and silicone oil.

This packing is well-suited for equipment in processes which use abrasive media, such as the manufacturing of non-bleached packaging paper. Style 2773 also performs well in equipment designed for fluids that contain solids or suspended solids, such as the source water pumps, water and effluent treatment equipment, and log washers found in pulp and paper plants.

Style 2773 mechanical packing will support equipment in applications having a service temperature range of -100°C (-150°F) to 250°C (480°F). It will service equipment in applications with a static pressure of 1740 psi (120 bar), rotating pressure of 290 psi (20 bar), or reciprocating pressure of 870 psi (60 bar). Style 2773 packing will handle media with a pH range of 1-13, and shaft speeds of 3937 feet per minute (20 meters per second).

Mechanical packing for pulp and paper applications: Style 2774

For applications involving fluids containing suspended solids and where contamination from graphite in a mechanical packing cannot be tolerated, style 2774 packing is the preferred choice. This packing can be used in pumps, agitators, and mixers, as well as rotating equipment and valves.

Style 2774 packing is made with an interbraid cross-section with a proprietary yarn composed of Phenolic and other high-quality synthetic fibers. It is impregnated with PTFE and mineral lubricant. This packing has an excellent cost versus benefit ratio, and qualifies as one of the best options for pulp and paper applications which require a packing that is able to withstand granular and abrasive media. It provides high durability and resistance to chemical attack without wearing out or damaging equipment shafts.

Style 2774 mechanical packing will support equipment in applications having a service temperature range of -100°C (-150°F) to 250°C (480°F). It will service equipment in applications with a static pressure of 1740 psi (120 bar), rotating pressure of 290 psi (20 bar), or reciprocating pressure of 870 psi (60 bar). Style 2774 packing will handle media with a pH range of 1-13, and shaft speeds of 2950 feet per minute (15 meters per second).

CRG works extensively with pulp and paper facilities to meet their fluid sealing needs. We can supply a wide range of mechanical packing and other sealing products to keep equipment running effectively, reducing downtime and maintenance costs. To find out more about the mechanical packing for pulp and paper applications which we can supply, please contact our sales team at crg@canadarubbergroup.com.