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Centrifugal Chemical Process Pumps

Series : PCF
Series : SCP
Series : PPC
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According to ANSI B 73.1
JEC make Chemical Process Pump : SCP series.

Constructional features:

Casing: Top centerline 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 B16.5, 150# flanges standard and also ANSI B16.5, 300# optional for working pressures to 2550 kPa with 3mm corrosion allowance. For maximum corrosion/erosion resistance casing is supplied without tapped openings but if specified, gauge and drain plug openings are provided.
Impeller: Statically & dynamically balanced 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 to avoid entrance of solids by back pump-out vanes. Large smoothly contoured flow passages combine best slurry and solid handling ability. Impeller is locked on shaft with impeller locknut and are sealed by PTFE gasket. Our state of art casting methods provide smoothest possible surfaces for highest efficiency.

Stuffing box cover: Encloses back of causing, contains stuffing box chamber. Cover is fastened to frame or adopter so that a spare back pull-out assembly can be stocked completely assembled. For high temperature services, a jacketed cooling stuffing box chamber can be supplied. A Jacketed arrangement can also be used for heating viscous / high freezing point liquids. Packed box consists of five packing rings & a lantern ring. Quench gland with water tapes and an auxiliary packing ring is standard. Gland is spilt for easy removal. Tapped openings to lantern ring permit IN & OUT sealing, with 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 oilier 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, hook type, 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: Onboard bearing is pressed on shaft and is free to float axially in frame-carries radial load only. Outboard bearing is shouldered and locked on shaft with locknut, washer & 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 accommodate all pumps sizes & 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 otherwise specified.

Specification: Based on ANSI B73.1

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