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Grundfos 98924635 - 77S50-10
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Grundfos 98924635 - 77S50-10
Grundfos Pumps & Systems

Grundfos 98924635 - 77S50-10

GRUNDFOSSKU: 98924635
Price:
$6,899.00

Delivery date to be confirmed on Sales Order

or Call for most up to date lead times. (781) 281-8905

Description

Grundfos — World's Largest Pump Manufacturer · Bjerringbro, Denmark
77S50-10 · Grundfos Accessory / Spare Part / Control
ACC5HP440-460V3.0-Phase60 HzIP68Stainless steel

The Grundfos 98924635 (77S50-10) is a Grundfos Accessory / Spare Part / Control. Genuine Grundfos accessory, control component, spare part, or sensor. Nominal performance: 73.5US gpm at 198.8ft. Rated 440-460V, 3.0-Phase, 60 Hz. Applications include Residential groundwater intake, Residential water pressure boosting, Municipal wells and more.

Power
5HP
Voltage
440-460V
Phase
3.0-Phase
Max Flow
73.5US gpm
Max Head
198.8ft
Max Pressure
870.23psi
Grundfos
World's largest pump manufacturer — engineering and manufacturing in 17 countries since 1945
Industrial Grade
Built and tested to IEC and NEMA standards
Authorized Distributor
Genuine Grundfos product — full manufacturer warranty coverage
Expert Support
Technical help available — call (781) 281-8905 or chat
Why This Product

Genuine Grundfos Part

OEM component engineered and manufactured to Grundfos specifications. Maintains pump performance and warranty coverage.

Full Traceability

Genuine Grundfos parts carry manufacturer traceability from production through delivery. No counterfeit risk.

Authorized Source

PumpStop is an authorized Grundfos distributor. All parts are genuine — not aftermarket, not surplus.

Confirm Compatibility

Always verify part number against your pump model number and serial number before ordering. Contact PumpStop for parts identification assistance.

Technical Support Available

PumpStop technical team can identify correct parts from pump nameplate data, serial number, or model code. Call (781) 281-8905 or chat.

Contact for Availability

Parts availability varies. Contact PumpStop to confirm stock, lead time, and pricing before placing an order.

Model Information — 77S50-10
Series: ACC
Model Code: 77S50-10
Impeller Material: Stainless steel
Technical Specifications
Model Number 98924635
Product Series ACC
Series Description Grundfos Accessory / Spare Part / Control
Power 5HP
Voltage 440-460V
Phase 3.0-Phase
Frequency 60 Hz
Motor Speed 3470-3480rpm
Pump Speed 3450rpm
Full Load Current 8.1-8.1A
Motor Type MS4000
Insulation Class F
Protection Class (IP) IP68
Nominal Flow 73.5US gpm
Nominal Head 198.8ft
Max Operating Pressure 870.23psi
Max Fluid Temperature 104°F
Nominal Pipe Bore 2inch
Pipe Standard NPT(F)
Impeller Material Stainless steel
Approvals / Certifications CULDWUS, CCSAUS
Applications
Residential groundwater intake
Residential water pressure boosting
Municipal wells
Municipal solar solutions
Rotor & spray irrigation
Ground water transfer
Livestock & Wildlife Watering
Water Treatment Fertigation
Chemigation & Dosing
Pivot & Lateral Irrigation
Frost protection
Solar boosting and water supply solutions
Controls and digital groundwater management
Solar controls and digital water management
Municipal solar solutions
Agriculture solar solutions
Livestock watering with solar solutions
Community solar solutions
Important Notices
Electrical Verify supply voltage, phase, and frequency match nameplate before installation: 440-460V, 3.0-Phase, 60 Hz.
Temperature limits Do not exceed max fluid temperature 104°F. Exceeding limits damages seals and motor insulation.
Dry running Do not run dry. ACC pumps use the pumped fluid to lubricate the shaft seal. Dry running destroys the seal within seconds. Install dry-run protection on all automatic installations.
Maintenance Refer to the Grundfos Installation and Operating Manual (IOM) for correct installation, commissioning, and maintenance. Contact PumpStop for documentation.
Documentation
✓ Installation and Operating Manual (IOM) — ACC Series
✓ Product Data Sheet — 77S50-10
✓ Service Manual and Spare Parts List
Need the IOM, data sheet, or spare parts list? Contact PumpStop and we'll send it over.
Before You OrderConfirm model code, voltage, phase, and frequency match your installation. For sizing help, spare parts, or documentation, call (781) 281-8905 or chat with PumpStop.
Grundfos — 98924635 · 77S50-10Authorized Grundfos Distributor · pump-stop.com
Approvals
CULDWUS,CCSAUS
Approvals for drinking water
PROP65
Approvals for motor
CE,EAC,CSACE,EAC,CSA
Built-in motor protection
NONE
Connection
2 inch
Curve tolerance
ISO9906:2012 3B
Diameter
4.13 in
DOE Pump Energy Index CL
0.91
Enclosure class (IEC 34-5)
IP68
Frequency
60 Hz
Gross weight
129.0 lb
Impeller
Stainless steel
Impellers
NONE
Insulation
F
Insulation class (IEC 85)
F
IP Class
IP68
KVA code
J
Liquid max temp
104°F
Liquid temperature range
5 .. 104 °F
Maximum operating pressure
870.23 psi
Maximum outlet pressure
127.63 psi
Minimum borehole diameter
4.13 in
Model
A
Motor
Stainless steel
Motor diameter
4 inch
Motor flange design
NEMA
Motor type
MS4000
Motor version
T40
n rpm
F
Net weight
73.6 lb
Number of reduced-diameter impellers
NONE
P2 kW
5 HP
Phase
3
Power (P2) required by pump
5 HP
Power factor 1
0.83-0.80
Pump
5 HP
Pump speed on which pump data are based
3450 rpm
Rated current
8.65-8.65 A
Rated flow
73.5 US gpm
Rated head
198.8 ft
Rated power - P2
5 HP
Rated speed
3460-3470 rpm
Rated voltage
3 x 440-460 V
Return valve
YES
Service factor
1.15
Shaft
Product name:77S50-10
Shaft seal
HM/CER
Size of connection
2 inch
Stages
10
Start. 1 method
DOL
Starting current
550-590 %
Type
MS4000
Type of connection
NPT(F)
Valve
YES
Version
T40
Windings
Enamelled

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