Ws+ Series (IEC) - Self-Priming Centrifugal Pumps

Ws+ is a self-priming centrifugal pump

Reduce your noise level and benefit from the amazing development in self-priming.

The self-priming Ws+ is designed to handle CIP (Clean In Place) return and other fluids with entrained air and foam. The unique design reduces the energy consumption and noise of traditional liquid ring pumps by using a high efficiency impeller that can be trimmed to match a specific duty. The Ws+ employs a built in eccentric air screw to form the liquid ring required for its self-priming capability.

20-90% more efficient than other liquid rings due to improved fluid flow through pump.
Performance optimized by matching impeller size to duty.
Low noise level: Due to its hydraulic design the noise level of the Ws+ is significantly lower than traditional liquid ring pumps.
3-A (optional) and EHEDG approved.
Interchangeable with W+ parts. Inventory is reduced by sharing common parts.
Less prone to damage. Small objects can pass through pump with minimal damage.

The pump is approved according to the American 3-A standard (optional). Consequently the pump can be used as a CIP as well as a first class hygienic product pump. The Ws+ series consist of 3 pump sizes.

Ws+ 20/15
Ws+ 30/30
Ws+ 44/50

At 50 Hz the Ws+ operates at a maximum pressure of 6.5 bar (94 psi) and a flow capacity of 90 m3/hour (396 GPM), while the values for a pump with a 60 Hz motor is 9.5 bar (138 psi) and 110 m3/hour (484 GPM).

Key Applications

Bakery and Confectionery

Batters
Fats & Oils
Flavorings
Sweeteners
Yeast Slurry
Syrups

Dairy

Whey
Cream
Milk
Sweetended Condensed
RO/UF Systems

Pharmaceutical/Cosmetics

Emulsions
Extracts
Slurries
Syrups
Dyes
Alcohols
Essential Oils

Chemical/Industrial

Detergents
Dyes
Soap Liquors & Solutions
Ammonium Nitrate
Propyl Alcohol
Potassium Chloride
Sodium Acetate

Model	Inlet Size mm	Oulet Size mm	Max. Impeller mm	Max. Cap. (M3/H) 2900 RPM	Max. Head (MWC*) 2900 RPM	Max. Discharge Pressure (bar)	Max. Operating Temperature
20/15	65	51	142	30	27	6	95°C > 95°C, please contact SPX FLOW
30/30	65	51	175	50	40	8
44/50	76	51	220	90	65	13

Model

Inlet Size
mm

Oulet Size
mm

Max. Impeller
mm

Max. Cap. (M3/H)
2900 RPM

Max. Head (MWC*)
2900 RPM

Max. Discharge Pressure (bar)

Max. Operating
Temperature

20/15

142

95°C

> 95°C, please contact SPX FLOW

30/30

175

44/50

220

* 10 mwc equals 1 bar

Ws+ pumps meet the requirements of the Regulation (EC) No 1935/2004 on materials and articles intended to come into contact with food and repealing Directives 80/590/EEC and 89/109/EEC.

Materials		Port Connections	Motor
Casing	SS 316L	Pumps can be supplied with all standard threads an d clamps in accordance to DS, BS, DIN, SMS and ISO as we ll as DIN flanges.	IEC metric standard, at 50/60 Hz, IP55, insulation class F. Ws+ pumps are as standard in Europe delivered with motors meeting the IE2 efficiency level in accordance to the Directive 2005/32/ EC Eco-design of Energy using Products.
Front Cover	SS 316L
Impeller	SS 316L
Air Screw and Recirculation Pipe	SS 316L
Back Plate	SS 316L
Shaft	SS 316L
Clamp Rings	SS 304
Extension Frame	SS 304
Legs	SS 304
Motor Shroud	SS 304
Shaft Seal	Carbon/Silicon Carbide Optional: Silicon Carbide/Silicon Carbide
Elastomers	EPDM (FDA Compliant) Optional: FPM (FDA Compliant)

The Ws+ range consists of 3 basic models – Ws+20/15, Ws+30/30 and Ws+44/50 - with pressure and flow capacities to 6,5 bar (50 Hz) and to 90 m3/h (50 Hz). The use of a conventional open impeller design ensures a flexible flow range enabling adjustment of performance to application. A Ws+ pump can be optimized the same way as a conventional end-suction centrifugal pump.