TU18078 Stuffing Box for 20x18 Concentrator Process Pumps

Tobee Stuffing Box TU18078 is the best important parts in the 20/18 AH gland seal slurry pump, the big pump can be used as a concentrator process pump.

Slurry pump stuffing box of a sailboat will have a stern tube that is slightly bigger than the prop shaft. It will also have packing nut threads or a gland nut. The packing is inside the gland nut and creates the seal. The shaft is wrapped by the packing and put in the gland nut. Through tightening it onto the stern tube, the packing is compressed, creating a seal against the shaft. Creating a proper plunger alignment is critical for correct flow and a long wear life. Stuffing box components are of D21 cast iron, A05 high chrome, stainless steel, brass or other application-specific materials.
Stuffing Box Design:

When centrifugal pumps were developed there was a need to prevent the pumpage from pouring out thru the open clearance between the pump casing back and the rotating shaft, which turns the impeller.  This was accomplished by stuffing rope like material, called packing, into a cylindrical opening in the rear of the casing where the shaft passes through it.  Packing is usually 1/4”, 3/8”, or 1/2” square cross sectional, the size to match the annular section between the shaft OD and the stuffing box ID.  It comes in coils, and is cut to fit around the shaft OD. It is a soft material and usually has a lubricant in it. The opening, the stuffing box, has a shoulder at the bottom or “throat” (inboard end closest to impeller) and is fitted with a follower, called the gland, on the outboard end, which compresses the packing into the inner sides of the stuffing box against the shoulder in the bottom of the box, and against the rotating pump shaft. This effectively limits the leakage out of the pump.  It will not completely prevent leakage.  A small amount of pumpage must leak out of the pump in order to cool and lubricate the packing.

20x18TU-AH Slurry Pump is the world's most comprehensive centrifugal slurry pumps for use in mining, chemical and industrial applications. The 20x18 slurry pumps are designed for ultra heavy duty applications such as mill discharge, process plant and tailings, high pressure pipelines, as well as other specialty applications.

Design Features:

√ Heavy duty construction with through-bolt design provides ease of maintenance and minimal downtime.
√ Ductile iron fully lined casing provides durability, strength, safety, and long service life.
√ Large diameter, slow turning, high efficiency impellers designed to achieve maximum wear life and low operating costs.
√ Large, open internal passages designed to reduce internal velocities, maximise wear life and lower operating costs.
√ Thick elastomer or alloy bolt-in liners provide superior corrosion resistance plus offer ease of liner change-out and interchangeability to reduce overall maintenance costs and maximise wear life.
√ Minimal shaft/impeller overhang reduces shaft deflection and increases packing life.
√ Cartridge-style bearing assembly allows for maintenance in a clean environment without removal of the pump, resulting in reliable operation and prolonged bearing life.
√ Grease or oil lubrication bearing assembly options offer ease of maintenance and reduced downtime.
√ Optional dry running shaft seal reduces or eliminates flush water requirements
√ Effective expeller prolongs packing life while reducing or eliminating flush water requirement.
√ Interchangeability of seal arrangements – full flush, low flow, centrifugal, or mechanical seals may be fitted to any sized pump.

Slurry Pump Stuffing Box Codes: