InterpumpPumps & Compressors

Interpump PUMP W4518 SX

The Interpump W4518 SX is an industrial-duty high-pressure pump delivering 18 L/min at 450 bar, rated 15.44 kW at 1450 rpm. Suited for demanding hydraulic and cleaning applications requiring sustained pressure…

SKU 3G-ITP-01755

Also listed as: W04518S000 · W04518S 000

Brand

Interpump

Item

PUMP W4518 SX

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

18 L/min

Pressure

450 bar

Power

15.44 kW

Speed

1450 RPM

Weight

19.5 kg

Dimensions

351.5 mm

Power

21 HP

Flow (US)

4.75 GPM

Pressure

45 MPa

Pressure

6525 PSI

Datasheet Content

W4518




TECHNICAL INFORMATION
Flow (L/min)                        18
Flow (US Gpm)                       4,75
Rotation regime (rpm)               1450
Pressure (MPa)                      45
Pressure (bar)                      450
Pressure (psi)                      6525
Power (hp)                          21
Power (kW)                          15,44
Overall dimensions L x l x h (mm)   351,5x242,5x195,5
Weight (kg)                         19,5




W4518                                                   3/21/2026   Page 1 - 8
Copyright INTERPUMP GROUP S.P.A
W4518

     Documents

Male shaft (key)

Male shaft (key) - vers. ATEX




W4518                             3/21/2026   Page 2 - 8
Copyright INTERPUMP GROUP S.P.A
Illustration Male shaft (key)




W4518                             3/21/2026   Page 3 - 8
Copyright INTERPUMP GROUP S.P.A
Illustration Male shaft (key)

Pos.     Code           Description                   Qty Notes
KIT3     34000301       KIT 3 OIL SEAL D.30X55X7      1
KIT2     34000201       KIT 2 OIL SEAL D. 22X32X5,5   1

KIT175   34017501                                     1
KIT174   34017401                                     1
KIT150   34015001       KIT 150 INTAKE/DEL.VALVE      1
60       98204300       PLUG G1/4X10                  1
59       93185800                                     1
58       90162500       OIL SEAL 22x32x5              3
57       90912600       BUSHING 22X25X30              3
56       99364400       SCREW M 10x18-5931            4
55       96710600       WASHER 10,2                   4
54       47200074       PUMP FOOT                     2
53       90263400                                     3
52       66216270                                     3
51       90263100                                     3
50       90361600       O-RING 34,65X1,78 (2137)      3
49       66080270                                     3
48       98210000       PLUG G3/8X13                  1
46       90164800       OIL SEAL 30x55x7              1
45       47151022       OPEN SIDE COVER (47-66)       1
44       66219566       PISTON BOLT                   3
43       90358400       O-RING D.10,82X1,78(2043)90SH 3


42       66040209                                     3
41       96710100       WASHER D. 10X28X0.5           3
40       66050066       PISTON GUIDE - S.S.           3
39       97740500       CONNECTING ROD-PIN D.14X39 3


38       99309900       SCREW M 8x35 UNI 5931         6
37       90358500       O-RING 10,82X1,78 (2043)      2
36       98204250       PLUG G1/4"x12                 1
35       98217600       PLUG G1/2X10                  1
34       96751400       WASHER 21,5X27X1,5            1
33       99188400       SCREW M 6x20 UNI 5931         4
32       66160022       REAR COVER                    1
31       90392200       O-RING D.133.02X 2,62(3525)   1


30       66030001       CONNECTING ROD                3
29       91489200       KEY 8(h9)X7X35 UNI 6604/A     1


28       66020435       CRANKSHAFT C.21 - D. 24       1
27       98210600       OIL DIP-STICK G3/8X80         1




W4518                                                             3/21/2026   Page 4 - 8
Copyright INTERPUMP GROUP S.P.A
Illustration Male shaft (key)

Pos.   Code             Description                 Qty Notes

26     66010022         CRANKCASE                   1
25     91838000         ROLLER BEARING NJ2206EC     2
24     90075600         CIRCLIP D.45 (ZJ45)         1
23     70211801         OIL SIGHT GLASS             1
22     90387700         O-RING 39,34X2,62 (3156)    1
21     90391300         O-RING 67,95X2,62 (3268)    2
20     47151222         SIDE CRANKCASE COVER FOR    1
                        OIL GAUGE
19     99303900         SCREW M 8x16 UNI 5931       8
18     66130141                                     3
17     90516500         ANTI-EXTR.RING D.24.7x29x1.5 3


16     66210070                                     3
15     90385700         O-RING 23,81X2,62 (132)     6
14     66210166                                     3
13     90384300         O-RING 17,86X2,62 (123)     3
12     90511500         ANTI-EXTRUSION RING         3
11     36202551         VALVE CAGE                  6
10     94737600         SPRING D. 9,4X14,8          6
9      36203266         SPHERICAL VALVE             6
8      36200366         VALVE SEAT                  6
7      90384100         O-RING 17,12X2,62 (3068)    6
6      36712101         INTAKE/DELIVERY VALVE       6
5      66210270                                     3
4      90359600                                     3
3      90511800                                     3
2      99382000                                     8
1      66124041                                     1




W4518                                                           3/21/2026   Page 5 - 8
Copyright INTERPUMP GROUP S.P.A
Illustration Male shaft (key) - vers. ATEX




W4518                                        3/21/2026   Page 6 - 8
Copyright INTERPUMP GROUP S.P.A
Illustration Male shaft (key) - vers. ATEX

Pos.     Code           Description                   Qty Notes
KIT3     34000301       KIT 3 OIL SEAL D.30X55X7      1
KIT2     34000201       KIT 2 OIL SEAL D. 22X32X5,5   1

KIT175   34017501                                     1
KIT174   34017401                                     1
KIT150   34015001       KIT 150 INTAKE/DEL.VALVE      1
63       99180900       SCREW M06X10 5931 A2-70       1
62       96693950       WASHER 6.4x11.0x0.7 D6798A    1
                        INOX
61       98203600       PLUG G1/4x8 FOR PROBE D.6     1
                        S.S.
60       90075500       STOP RING J45 UNI7437         1
60       98204300       PLUG G1/4X10                  1
59       93185800                                     1
58       90162500       OIL SEAL 22x32x5              3
57       90912600       BUSHING 22X25X30              3
56       99364400       SCREW M 10x18-5931            4
55       96710600       WASHER 10,2                   4
54       47200074       PUMP FOOT                     2
53       90263400                                     3
52       66216270                                     3
51       90263100                                     3
50       90361600       O-RING 34,65X1,78 (2137)      3
49       66080270                                     3
48       98210000       PLUG G3/8X13                  1
46       90164800       OIL SEAL 30x55x7              1
45       47151022       OPEN SIDE COVER (47-66)       1
44       66219566       PISTON BOLT                   3
43       90358400       O-RING D.10,82X1,78(2043)90SH 3


42       66040209                                     3
41       96710100       WASHER D. 10X28X0.5           3
40       66050066       PISTON GUIDE - S.S.           3
39       97740500       CONNECTING ROD-PIN D.14X39 3


38       99309900       SCREW M 8x35 UNI 5931         6
37       90358500       O-RING 10,82X1,78 (2043)      2
35       98217600       PLUG G1/2X10                  1
34       96751400       WASHER 21,5X27X1,5            1
33       99188400       SCREW M 6x20 UNI 5931         4
32       66160022       REAR COVER                    1
31       90392200       O-RING D.133.02X 2,62(3525)   1




W4518                                                             3/21/2026   Page 7 - 8
Copyright INTERPUMP GROUP S.P.A
Illustration Male shaft (key) - vers. ATEX

Pos.   Code             Description                 Qty Notes

30     66030001         CONNECTING ROD              3
29     91489200         KEY 8(h9)X7X35 UNI 6604/A   1


28     66020435         CRANKSHAFT C.21 - D. 24     1
27     98210700         OIL DIPSTICK G3/8X64        1
                        D4+FILTER ATEX
26     66010022         CRANKCASE                   1
25     91838000         ROLLER BEARING NJ2206EC     2
23     70211751                                     1
22     90387700         O-RING 39,34X2,62 (3156)    1
21     90391300         O-RING 67,95X2,62 (3268)    2
20     47151322         SIDE CRANKCASE COVER (ATEX) 1


19     99303900         SCREW M 8x16 UNI 5931       8
18     66130141                                     3
17     90516500         ANTI-EXTR.RING D.24.7x29x1.5 3


16     66210070                                     3
15     90385700         O-RING 23,81X2,62 (132)     6
14     66210166                                     3
13     90384300         O-RING 17,86X2,62 (123)     3
12     90511500         ANTI-EXTRUSION RING         3
11     36202551         VALVE CAGE                  6
10     94737600         SPRING D. 9,4X14,8          6
9      36203266         SPHERICAL VALVE             6
8      36200366         VALVE SEAT                  6
7      90384100         O-RING 17,12X2,62 (3068)    6
6      36712101         INTAKE/DELIVERY VALVE       6
5      66210270                                     3
4      90359600                                     3
3      90511800                                     3
2      99382000                                     8
1      66124041                                     1




W4518                                                           3/21/2026   Page 8 - 8
Copyright INTERPUMP GROUP S.P.A

Technical Documents

(1)

Technical Data Sheet

PDF Document

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Interpump Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

Frequently Asked Questions

What is the Interpump W4518 SX pump used for?

The Interpump W4518 SX is an industrial high-pressure pump used in demanding hydraulic and cleaning applications that require sustained pressure performance. It delivers 18 L/min at 450 bar, making it suitable for water jetting, pressure washing, and industrial fluid transfer systems in Singapore.

What are the specifications of the Interpump W4518 SX pump?

The Interpump W4518 SX pump delivers 18 L/min at 450 bar (45 MPa, 6525 psi). It is rated at 15.44 kW (21 hp) at 1450 rpm, weighs 19.5 kg, and has overall dimensions of 351.5 x 242.5 x 195.5 mm. The pump features a male shaft (key) design and is built for continuous industrial use.

Where to buy the Interpump W4518 SX pump in Singapore?

3G Electric sources and delivers the Interpump W4518 SX pump to Singapore. We handle logistics, customs clearance, and local delivery, providing technical support for industrial applications. Contact us for pricing and lead time on this high-pressure pump.

How to maintain the Interpump W4518 SX pump?

Regular maintenance of the Interpump W4518 SX includes checking oil seals (e.g., kit 3 oil seal D.30x55x7 and kit 2 oil seal D.22x32x5.5), inspecting intake/delivery valves, and monitoring oil level via the dip-stick. Use genuine Interpump spare parts and follow the manufacturer's service intervals for optimal performance.

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 W4518 parts list — 94 parts, 47 available in catalog

Official Parts List

W4518 — Male shaft (key) exploded diagram

Repair Kits — Order These for Routine Maintenance

KIT2

KIT 2 OIL SEAL D. 22X32X5,5

34000201×1Available

Interpump PUMP W4518 SX

Local availability & support — Singapore

Technical Specifications

Datasheet Content

Technical Documents

Need installation or engineering help?

Ask a question

Product Description

Frequently Asked Questions

Used in

Spare Parts & Repair Kits

Interpump Products

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