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Service & Suport

Universal 1 Series - 420/520 High Capacity - Positive Displacement Pumps
Positive Displacement Pumps designed to overcome the challenge of accurate pumping at high-volume capacities.
420 & 520 Series High-Volume PD Pumps
Learn more about our eXpress app pump services.
Designed for demanding applications in the tomato, vegetable, and pet food industries, as well as chemical and industrial processes. These pumps deliver exceptional volume per revolution:
- Model 420: Pumps over 1 gallon (6 liters) per revolution
- Model 520: Pumps over 2 gallons (8 liters) per revolution
Sanitation Features
- Rotor/shaft connection sealed from product zone
- Sideway mounting capability for improved draining
- 316L stainless steel pump body and cover
- Standard non-galling Waukesha 鈥88鈥 alloy rotors for tighter clearances and higher efficiency; 316 stainless rotors also available
- Mechanical seals standard
- Aseptic model option available
Long-Life Features
- Large diameter 17-4 PH shafts for enhanced strength
- Heavy-duty bearing frame for durability
- Double tapered roller bearings for precise rotor movement and extended seal life
- Body bolted to gear case to maintain seal face contact during cover and rotor removal
- Grease-lubricated bearings ensure consistent lubrication across all operating conditions
- No bearings in the product zone
- Rotor nuts engineered for long-term service without loosening
MODEL | DISPLACEMENT PER REVOLUTION |
NOMINAL CAPACITY TO |
PRESSURE PSI |
---|---|---|---|
420-UHC | 1.62 Gal. (6.129 Liter) | 640 GPM (145.4 m鲁/hr.) | 200 PSI (13.8 bar) |
423-UHC | 1.62 Gal. (6.129 Liter) | 640 GPM (145.4 m鲁/hr.) | 200 PSI (13.8 bar) |
520-UHC | 2.38 Gal. (8.990 Liter) | 830 GPM (188.5 m鲁/hr.) | 150 PSI (10.3 bar) |
523-UHC | 2.38 Gal. (8.990 Liter) | 830 GPM (188.5 m鲁/hr.) | 150 PSI (10.3 bar) |
MODELS 420-UHC AND 423-UHC
0-400 RPM speed range. 6", 150# flanged port size; suitable to 200 PSI (13.8 bar) differential pressure. Temperature range -40掳F (-40掳C) to 300掳F (149掳C).
Double barriers or seals protect at every opening to the pump chamber. Live steam or a sterile fluid is circulated between these double seals at the ports, in the cover and at the shaft seals form an impenetrable barrier to contaminants.

AO | CP | D | I | J | L | O | U | 2X | FLANGE SIZE | |
---|---|---|---|---|---|---|---|---|---|---|
IN | 27.25 | 49.60 | 18.75 | 33.60 | 9.75 | 39.19 | 14.25 | 3.875 | 22.50 | ANSI 6" |
MM | 692.2 | 1259.8 | 476.2 | 853.4 | 247.6 | 995.4 | 362 | 98.42 | 571.5 |
Approximate shipping weight: 2600 lb. (1180 kg.).
MODELS 520-UHC AND 523-UHC
0-350 RPM speed range. 8", 150# flanged port size; suitable to 150 PSI (10.3 bar) differential pressure. Temperature range -40掳F (-40掳C) to 300掳F (149掳C).
Double barriers or seals protect at every opening to the pump chamber. Live steam or a sterile fluid is circulated between these double seals at the ports, in the cover and at the shaft seals form an impenetrable barrier to contaminants.

AO | CP | D | I | J | L | O | U | 2X | FLANGE SIZE | |
---|---|---|---|---|---|---|---|---|---|---|
IN | 27.25 | 51.47 | 18.75 | 33.60 | 9.75 | 39.55 | 14.25 | 3.875 | 22.50 | ANSI 8" |
MM | 692.2 | 1307.3 | 476.2 | 853.4 | 247.6 | 1004.6 | 362 | 98.42 | 571.5 |
Approximate shipping weight: 3000 lb. (1360 kg.).
NOTES: Dimensions are for guidance purposes only. Contact your WCB Representative if more detailed measurements are needed. Waukesha Cherry-Burrell (WCB) curves are intended for use as an aid for preliminary selection of pumps by trained and qualified engineers. All selections must be reviewed by authorized WCB personnel prior to placing an order. WCB is not responsible for unauthorized or incorrect selections resulting from the use of these curves.Body Standard:听 316L Stainless Steel Options:
- Flush taps for future double seals
- Body retaining screws
Ports Standard:听 S-Line Options:
- Bevel Seat, I-Line, Q-Line; European DIN, SMS or RJT
- Male NPT, 150 lb. & 300 lb. Flanges. (150 lb. standard on Model 320)
- Rectangular Flange Inlet or Aseptic ports
- Extended ports
- Optional port sizes on 6, 18, 30 and 60 Models
Covers Standard:听听316L SS plain cover, hex cover nuts Options:
- Vent or drain connections
- Aseptic, jacketed or vented
Rotors Standard:听听Alloy 88 Twin Wing. Standard clearance for up to听180掳 F (82掳 C) Options:
- Hot clearance to 300掳 F (149掳 C)
- Clearance above 300掳 F (149掳 C) on application
- Special & front face clearances and slotted rotor hub for special applications
O-Rings Standard:听Buna-N Options:
- Fluoroelastomer (FKM)
- EPDM
- Silicone
- EPDM-SF
Seals Standard:听Single Mechanical Options:
- Double Mechanical
- Seal faces:听 Ceramic, Silicon Carbide, Tungsten Carbide, Carbon, John Crane Type 8B2 Carbon,听 Seal Faces
Gearcase Standard: Painted cast iron WCB blue, 316L SS shafts, top shaft听position,听17-4 PH shafts Options:
- Steel-It paint
- Lower shaft position
- Pedestal shims for side mounted pumps. Left hand shaft position standard
- Right hand shaft position on side mounted gearcase
Bases Standard:听Flat plate, epoxy painted, with adjustable feet, SS coupling听guard, and Lovejoy or Woods coupling Options:
- Carbon steel channel
Drives Standard:听Nord/Baldor Inline Option:
- Right angle gear reducer