4 china sump pumps

Tobee® TH Slurry Pumps

Cartridge-type Shaft and Bearing Assembly

A large diameter shaft with a short overhang minimizes deflection and vibration. Heavy-duty,grease-lubricated cylindrical and/or taper roller bearings are enclosed in a c artridge-type housing protected at both ends by a rotating labyrinth with double piston ring and patented -10 grease purged lip seal. Only four through bolts are required to hold the “cartridge”assembly in the frame.

Pump Frame

A rigid, one-piece casting cradles the “cartridge” shaft and bearing assembly. A minimal number of through bolts hold the pump casing to the frame. An easy means of external impeller adjustment is provided in a convenient position below the bearing housing.

Interchangeable Shaft Seal

Tobee pumps provide complete interchangeability of seal arrangement s. Full-flush, low-fl ow centrifugal,or mechanical seals can be fitted to any size pump.

Slip-Fit Shaft Sleeve

A reversible, 420 stainless steel shaft sleeve, through hardened to Rockwell 55C, with 0-rings at both ends, completely protects the shaft.

Centrifugal Shaft Seal

Tobee’s centrifugal seal eliminates the need for a gland-water system and potential slurry contamination. More than 70% of all Tobee pumps are equipped with this seal arrangement.

Impeller

Front and rear shrouds have pump-out vanes. This design reduces recirculation and seal contamination.Hard metal and molded elastomer impellers are interchangeable. Cast-in impeller threads require no impeller insert or nuts.

Positively Attached Liner

Hard metal liners are interchangeable with pressure molded elastomers. The elastomer li ners are bolted,not bonded, to the outer casing. Elastomer seal rings back all liner joints.

Outer Casing

Casing halves of cast or ductile iron with external reinforcing ribs contain the wear liners and provide high operating pressure capabilities.

VARIATIONS OF THE TOBEE CENTRIFUGAL SHAFT SEAL

AVAILABLE WITH STANDARD OR OPTIONAL CENTRIFUGAL SEALS

METAL LINED

The expeller ring is interchangeable with a gland sealed stuffing box. The expeller and expeller rings are made of 650 BHN high chrome iron as a standard but can be provided in other materials suitable for specific applications.

ELASTOMER LINED

RUL E OF TH UMB:If the suct ion press ure of the pump is no greater than 10% of the discharge pressure, the application is suitable for a centrifugal shaft seal. For variations from this general rule, consult Tobee pump.

UNIQUE TOBEE IMPELLER DESIGN

Outward spiral of slurry in conventiona l pumps causes serious recirculation and consequent wear at the close impeller clearances.The pump-out vanes and concave impeller vane of a Tobee pump force the slurry to form a double inward spiral. This results in uniform wear, a greater utilization of wearing parts, an increased shaft seal life, and sustained high efficiency.