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Interpump PUMP WK5021 SX - Pumps & Compressors
InterpumpPumps & Compressors

Interpump PUMP WK5021 SX

The Interpump PUMP WK5021 SX is a 20.59 kW industrial pump delivering 21 L/min at 500 bar, designed for high-pressure applications across Southeast Asian manufacturing and processing sectors. Operating at 1450 rpm…

SKU 3G-ITP-01819

Also listed as: WK5021S000 · WK5021S 000

Brand
Interpump
Item
PUMP WK5021 SX
Part Number
WK5021S-000
Category
Pumps & Compressors
UNSPSC
40151527 — Plunger pumps
Available to Order
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Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Interpump
Flow Rate
21 L/min
Pressure
500 bar
Power
20.59 kW
Speed
1450 RPM
Weight
21.5 kg
Dimensions
350 mm
Manufacturer Part Number
WK5021
Power
28 HP
Flow (US)
5.55 GPM
Pressure
50 MPa
Pressure
7250 PSI

Technical Documents

(1)
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Interpump Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Interpump PUMP WK5021 SX is a 20.59 kW industrial pump delivering 21 L/min at 500 bar, designed for high-pressure applications across Southeast Asian manufacturing and processing sectors. Operating at 1450 rpm with a compact footprint (350 mm length), this unit combines proven Interpump engineering with the power density required for demanding industrial workflows. 3G Electric supplies the WK5021 SX as an authorised distributor with full DDP logistics support to Singapore and the region.

Frequently Asked Questions

What is the Interpump PUMP WK5021 SX used for?

The Interpump PUMP WK5021 SX is a high-pressure industrial pump used for demanding applications such as water jet cutting, hydro-demolition, and pressure testing in manufacturing and processing sectors across Southeast Asia.

What are the specifications of the Interpump PUMP WK5021 SX?

The Interpump PUMP WK5021 SX delivers 21 L/min at 500 bar (7250 psi) and 20.59 kW (28 hp). It operates at 1450 rpm, weighs 21.5 kg, and has overall dimensions of 350 mm x 243 mm x 187.5 mm.

Where to buy the Interpump PUMP WK5021 SX in Singapore?

You can buy the Interpump PUMP WK5021 SX in Singapore through 3G Electric, an authorised distributor. We handle full DDP logistics, including customs clearance and delivery, to ensure the pump reaches your facility in Singapore.

How to maintain the Interpump PUMP WK5021 SX?

Regular maintenance of the Interpump PUMP WK5021 SX includes checking oil seals, replacing packing and valve kits as needed, and monitoring oil level via the sight glass. Always follow Interpump’s service intervals for seals and pistons to ensure reliable high-pressure operation.

Used in

Common applications for Interpump
Shipyard hull cleaning and surface prep — HT100 and W951 paired with dual-lance guns for dockyard service
Petrochemical heat-exchanger descaling — WS-series stainless pumps for neutral-pH cleaning chemistry
Outdoor HVAC condenser mist cooling — ZP180 pumps on rooftop chiller decks
Textile fibre-finishing — W170 and W270 for mist-jet application across drying lines
Municipal water treatment — W951 motor pumps for high-pressure disinfection chemical injection

Spare Parts & Repair Kits

Official WK5021 parts list107 parts, 54 available in catalog

Official Parts List
WK5021 — Male shaft (key) exploded diagram

Repair Kits — Order These for Routine Maintenance

KIT2
KIT 2 OIL SEAL D. 22X32X5,5
34000201×1Available
KIT3
KIT 3 OIL SEAL D.30X55X7
34000301×1Available
View
KIT150
KIT 150 INTAKE/DEL.VALVE
34015001×1Available
KIT176
KIT176 COMPLETE SEALS D.18
34017601×1Available
View
KIT180
KIT 180 SEALS D. 18
34018001×1Available
View

Individual Components

PosCodeDescriptionQty
3
PLUG G1/8X8 S.S.
98197200×3Available
View
7
O-RING 17,12X2,62 (3068)
90384100×6Available
View
8
VALVE SEAT
36200366×6Available
View
9
SPHERICAL VALVE
36203266×6Available
10
SPRING D. 9,4X14,8
94737600×6Available
View
11
VALVE CAGE
36202551×6Available
View
12
INTAKE/DELIVERY VALVE
36712101×6Available
View
13
O-RING 23,81X2,62 (132)
90385700×6Available
14
ANTI-EXTR.RING D.24.7x29x1.5
90516500×3Available
View
18
O-RING 17,86X2,62 (123)
90384300×3Available
View
19
ANTI-EXTRUSION RING
90511500×3Available
View
22
WASHER 21,5X27X1,5
96751400×1Available
View
23
PLUG G 1/2X10 NICKEL
98217900×1Available
View
24
PLUG G. 3/8X13 NICKEL
98209900×1Available
View
26
PISTON BOLT
66219566×3Available
View
28
PISTON D.18X54
66040309×3Available
View
29
PACKING 18.0x28x10.0 HP 66
90265500×3Available
View
30
INTERMEDIATE RING D. 18 WK5021
66216370×3Available
View
31
SEAL D.18X26X6,5 L.P.
90265200×3Available
32
O-RING 34,65X1,78 (2137)
90361600×3Available

Need multiple parts? Request a bundled quote

54 parts available in our catalog — get a single quote with volume pricing

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Official WK5021 parts listIndustrial Pumps (Series 69)

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Interpump Products

3G Electric supplies Interpump pumps & compressors. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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