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Casing:
Top centreline discharge, self-venting casing, arranged for back pull-out. Fully confined gasket. Foot support under casing for maximum resistance to misalignment and distortion from pipe loads. ANSI-B-16.5 ( Class 150 ) flanges standard, ANSI-B-16.5 (Class 300) optional for working pressures to 2550 kPa with 3 mm corrosion allowance. For Maximum Corrosion-erosion resistance casing is supplied without tapped openings but gauge and drain plug openings are provided when specified.

Impeller:
Impeller matched to casing for high efficiency and low NPSH. Fully open, has partial shrouds for maximum vane support without high thrust inherent in closed impellers. Stuffing box pressure reduced and entrance of solids prevented by back pump-out vanes. Large smoothly contoured flow passages combine best slurry and solid handling ability. Impeller is locked on shaft with impeller lock-nut and are sealed by PTFE gasket. State of the art casting methods provide smoothest possible surfaces for highest efficiency. All impellers are statically and dynamically balanced

Stuffing box cover:
Encloses back of causing and contains stuffing box chamber. Cover is fastened to frame or adopter so that a spare back pull-out asembally can be stocked completely assembled.Cover can be supplied with jacket for cooling stuffing box chamber in high temperature services. Jacket can also be used for heating viscous or high freezing point liquids.
Packed box has five rings of packing and a lantern ring. Quench gland with water tapes and an auxiliary ring of packing is standard. Gland is spilt for easy removal. Tapped openings to latern ring permit "in" and "out" sealing,external flushing or lubrication as required. Stuffing box is completely machined for mechanical seal installation,either originally or as a field conversion. Inside, outside, unbalanced, balanced, single, double or tandem seals with any required gland, throat bushing, throttle bushing and flushing lines furnished to meet individual sealing problems. Gland completely confines stationary mating ring gasket.

Bearing Frame:
Sturdy cast iron construction provides rigid bearing alignment and shaft support. Contains large oil reservoir, with water jacket. Oil level maintained by constant level oiler with water jacket. Oil seals on each end and oil breather fully protect oil from contamination while allowing for expansion or contraction of air caused by ambient 0 temperature change. To handle liquids above 175 C, cast integral cooling chamber is designed for 600 kpa working pressure or 900 kpa test pressure.

Shaft:
A single piece shaft is designed for 0.05 mm maximum deflection at stuffing box face.All critical surfaces ground to less than 0.8 micron.

Shaft Sleeve:
Renewable shaft sleeve is positive driven,hooktype, with one end free to expand with temperature variations, PTFE gasket prevents leakage under sleeve. Sleeve permits application of inside balanced mechanical seals where required.

Bearings:
Inboard bearing is pressed on shaft and is free to float axially in frame-carries radial load anly. Outboard bearing is shouldered and locked on shaft with locknut and washer and in bearing housing to carry radial and any unbalanced thrust load. All bearing fits are precision bored. Inboard bearing is single row, deep groove. Outboard bearing is double row, deep groove angular contact. Both bearing are sized for two year minimum life.

Base Plate:
Heavy duty MS Channel base plate with large holes. Only three sizes of base plates accomodate all pumps sizes and all applicable IS or IEC frame size motors.

Coupling:
A standard spacer type coupling is furnished to take full advantage of the back pull-out feature. Factory selected coupling from leading manufacturers are supplied unless atherwise specified.

Specification:
Based on ANSI B73.1

 
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