Premier Pumps


Constructional Features

Advantages
Applications
Pump Sizes
PV Series

PRINCIPLE OF OPERATION :
Premier P-501 series operation of the pump is shown in figure below. A rotor (2) revolves without metallic contact in a circular casing (4) that contains a liquid compressant (usually water) (5). The rotor (2) is a casting consisting of a series of blades that project from hollow cylindrical hub through which the shaft has been pressed. These blades are shrouded at the sides and form a series of chambers. The curvature of these blades is in the direction of rotation indicated by the arrow.
Starting at point A, the chambers of the rotor are filled with water. This water rotates with the rotor, but follows the contour of the casing (4). The water (5), which entirely fills the rotor chamber at a point A, recedes into casing as the rotor advances, until at point C, the rotor chamber is empty.

The converging casing forces the water back into the rotor chamber until at point D, the chamber is again full. This cycle occurs once during each revolution of the rotor. As water recedes from the rotor chamber at point B, the water is replaced by air drawn through an inlet port (8) in the stationary conical cone casing (3) that connects to the pump inlet (1). As the rotor turns through 360 degrees and water is forced by the casing back into the rotor chamber, the air that has filled the chamber is forced through discharge ports (7) in the cone (3) to the pump discharge (6).
The water used as the liquid compressant also serves to seal clearances between the rotor and the cone and is referred to as seal water.

CONSTRUCTIONAL FEATURES:

Body, Heads, Cones are made of close grained heavy duty cast iron and rotor of spheroidal graphite (SG) iron free from cavities and blow holes. The shaft is made of carbon steel and carries the only one moving part, the rotor which is dynamically balanced for vibration free running. The shaft is carried on both the ends by antifriction taper roller bearings which maintain the close running clearance between working parts through out the working life of the pump. Bearings are grease lubricated before shipment and require no further lubrication for approximately six months.
The pumps can also be supplied with contact parts in SS 316 or SS 316 cladded body.
The stuffing box which prevents the leakage of gases and or air from the machine to the atmosphere or vice versa is proportioned for efficient operation by using a good quality packing rope. Replaceable shaft sleeves of phosphorous bronze/stainless steel are provided at the stuffing box portion of the pump.

SPECIAL ADVANTAGES:

Premier P-501 Series can handle excess liquid carryover without any difficulty, even if it arrives as massive slugs.
20-vane rotors handle air more efficiently than 16-vane rotor.
Ease in maintenance as bearing bracket is externally mounted.
Power efficient.
No pressure throb.
Highest CFM per BHP ratios.
Due to twin inlets available the pump can be operated as two independent Vacuum Pumps of half the capacity at different vacuum levels.
Enhanced capacity can be achieved when handling saturated gas by using inlet spray nozzles provided near the suction flanges of the pumps.

APPLICATIONS:

Pulp & Paper Industry Power Plants Sugar Industry Chemical & Pharmaceutical Industry
Food and Beverages Textile Industry Fertilizer plants Other process Industries

PUMP SIZES:

Maximum Achievable Vacuum 710 mm Hg

Premier Vacuum Pump Model	Nash Series	Capacity Range Min M3/Hr	Capacity Range Max M3/Hr
501-L1	904 L1	5000	9400
501-L2	904 L2	5400	9350
501-M1	904 M1	5760	10300
501-M2	904 M2	6100	10200
501-P1	904 P1	7450	13560
501-P2	904 P2	7960	13550
501-R1	904 R1	8810	15900
501-R2	904 R2	9490	16000

Note: Higher capacity ranges are under development

Gardner Denver Nash® is registered trademark of their
respective original manufacturing pump company, none of which have any affiliation with Premier Pumps.

Advantages

Applications

Pump Sizes