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

Product Type(s) : Centrifugal Pumps
Description :

The Ws+ uses a unique design that combines the abilities of most liquid ring pumps with the efficiencies of the W+ centrifugal series. As a result customers can now handle entrained air and lift requirements with lower horsepower, less noise and at lower cost.
WHERE TO BUY

FEATURES

Reduce your noise level and benefit from the amazing development in self-priming. The self-priming Ws+ is designed to handle Clean In Place (CIP) 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 by the EHEDG (European Hygienic Equipment & Design Group) as a hygienic pump and is also 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 94 psi (6.5 bar) and a flow capacity of 396 GPM (90 m3/hour,) while the values for a pump with a 60 Hz motor is 138 psi (9.5 bar) and 484 GPM (110 m3/hour).  

Theory of Operation

Unique Design

The Ws+ employs a unique eccentric screw and recirculation loop to generate the liquid ring required to handle aerated product and produce a vacuum. The design allows the use of standard centrifugal components to match the pump to a specific duty point to produce efficiencies previously unobtainable with liquid rings. Impellers can be trimmed to further reduce horsepower requirements. The result is higher efficiency, decreased power consumption, simpler components and less noise.

Callouts:

  1. Fluid recirculation loop
  2. Impeller
  3. Eccentric Screw

 

 

The APV Ws+ uses a unique design that combines the abilities of most liquid ring pumps with the efficiencies of the W+ centrifugal series. As a result customers can now handle entrained air and lift requirements with lower power
consumption, less noise and at lower cost. 

The Ws+ employs a unique air screw, spinning in an eccentric arranged priming liquid chamber, and a recirculation loop to generate the liquid ring required to handle aerated product and produce a vacuum in the suction pipe. The design allows the use of standard centrifugal pump components to configure the pump to a specific duty point to produce efficiencies previously unobtainable with liquid rings. Impellers can be trimmed to further reduce power consumption.

The result is:

  • Higher efficiency
  • Decreased power consumption
  • Simpler components
  • Less noise

Callouts:

  1. Air Screw
  2. Liquid Ring

Air screw spinning in an eccentric Liquid ring arranged chamber forms the liquid ring

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

DIMENSIONS & SPECIFICATIONS

Model 20/15

Unit Width Height
FRAME F1
in (mm)		 F2
in (mm)		 F3
in (mm)		 D
in (mm)		 A
in (mm)		 E
in (mm)		 L
in (mm)		 C
in
(mm)		 B
in
(mm)		 ZZ
in
(mm)		 OL
in
(mm)		 Z
in
(mm)		 X
in
(mm)		 Y
in
(mm)
145TC 3.75
(93.5)		 5.00
(127)		 10.25
(260.4)		 3.50
(88.9)		 5.50
(139.7)		 7.00
(177.8)		 9.46
(240)		 0.315
(8)		 5.98
(152)		 2.5
(63.5)		 2.0
(51.6)		 2.60
(66)		 8.47
(215)		 4.48
(190)
182TC 4.37
(111)		 4.50
(114.3)		 11.37
(288.8)		 4.50
(114.3)		 7.50
(190.5)		 8.00
(203.2)		 9.87
(250)		 7.01
(178)
184TC 5.50
(139.7)

NOTE: Dimensions are for guidance purposes only. Contact your SPX FLOW representative if more detailed measurements are needed.

Model 30/30

Unit Width Height
FRAME F1
in (mm)		 F2
in (mm)		 F3
in (mm)		 D
in (mm)		 A
in (mm)		 E
in (mm)		 L
in (mm)		 C
in
(mm)		 B
in
(mm)		 ZZ
in
(mm)		 OL
in
(mm)		 Z
in
(mm)		 X
in
(mm)		 Y
in
(mm)
184TC 4.37
(111)		 5.50
(139.7)		 11.37
(288.8)		 4.50
(114.3)		 7.50
(190.5)		 8.00
(203.2)		 12.12
(308)		 0.39
(10)		 6.14
(156)		 2.5
(63.5)		 2.0
(51.6)		 3.27
(83)		 9.06
(230)		 7.60
(193)
213TC 5.38
(136.7)		 13.88
(352.6)		 5.25
(133.4)		 8.50
(215.9)		 8.75
(222.3)		 11.86
(301)
215TC 7.00
(177.8)		 6.25
(158.8)
254TC 6.50
(165.1)		 8.25
(209.6)		 18.00
(457.2)		 10.00
(254)		 9.75
(267.7)		 12.12
(308)		 6.77
(172)

NOTE: Dimensions are for guidance purposes only. Contact your SPX FLOW representative if more detailed measurements are needed.

Model 44/50

Unit Width Height
FRAME F1
in (mm)		 F2
in (mm)		 F3
in (mm)		 D
in (mm)		 A
in (mm)		 E
in (mm)		 L
in (mm)		 C
in
(mm)		 B
in
(mm)		 ZZ
in
(mm)		 OL
in
(mm)		 Z
in
(mm)		 X
in
(mm)		 Y
in
(mm)
145TC 3.75
(93.5)		 5.00
(127)		 10.25
(260.4)		 3.50
(88.9)		 5.50
(139.7)		 7.00
(177.8)		 9.46
(240)		 0.315
(8)		 5.98
(152)		 2.5
(63.5)		 2.0
(51.6)		 2.60
(66)		 8.47
(215)		 4.48
(190)
182TC 4.37
(111)		 4.50
(114.3)		 11.37
(288.8)		 4.50
(114.3)		 7.50
(190.5)		 8.00
(203.2)		 9.87
(250)		 7.01
(178)
184TC 5.50
(139.7)

NOTE: Dimensions are for guidance purposes only. Contact your SPX FLOW representative if more detailed measurements are needed.

Model Inlet Size Outlet Size Maximum Impeller Size Maximum Capacity (GPM) Maximum Head (FT) Maximum Discharge Pressure Maximum Operating Pressure
inch mm inch mm inch mm 1750 rpm 3500 rpm 1750 rpm 3500 rpm

260 psi (18 bar): W+10/8, W+22/20, W+30/80, W+35/55, W+35/35, W+110/130 200 psi (14 bar): W+25/210, W+30/120, W+50/8, W+55/35, W+55/60, W+60/110, W+65/350, W+70/40, W+80/80

 

Optional: Heavy duty clamping ring, increasing max. outlet pressure to

360 psi (25 bar): W+30/120, W+55/35, W+55/60, W+60/110, W+70/40)

290 psi (20 bar): W+80/80

203°F (95°C) as standard.

>203°F, please contact SPX FLOW
10/8 1.5 38 1 25 4.3 110 32 65 17 68
22/20 2 51 2 51 5.6 142 85 175 34 138
25/210 6 152 4 102 11.4 290 1610 - 134 -
30/80 4 102 3 76 76 76 315 650 43 171
30/120 4 102 3 76 6.9 175 410 810 47 190
35/35 2.5 65 2 51 6.9 175 142 280 49 198
35/55 3 3 2.5 65 7.1 180 230 465 50 200
50/8 1.5 38 1 1 7.9 200 42 85 68 275
55/35 2.5 65 1.5 38 8.3 210 140 245 76 302
55/60 3 76 2 51 8.7 220 305 615 78 315
60/110 4 102 3 76 9.1 230 475 975 90 359
65/350 6 152 4 102 10.2 260 1250 2300 100 400
70/40 2.5 65 1.5 38 9.4 240 110 235 98 390
80/80 3 76 2 51 10 255 310 625 112 450

 

Materials Port Connections Motor
Casing SS 316L S-Line connections are standard. Bevel seat, I-line, ISO and other standard fittings are available. TE FC or Washdown enclosures available. Energy-efficient, Chem-duty, Explosion Proof and stainless steel also available, as well as single phase or three phase, 60 or 50 Hertz.
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
Adaptor SS 304
Support SS 304
Shaft Seal

Standard:
Carbon/Silicon Carbide

Optional:
Silicon Carbide/Silicon Carbide
Elastomers

Standard:
FKM

 

Optional:
EPDM

OPTIONS & PERFORMANCE

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VIDEOS

W+ Series Centrifugal Pump Animation

Downloads