InterpumpPumps & Compressors

Interpump PUMP WS252 R ATEX

The Interpump WS252 R ATEX is an industrial reciprocating pump designed for high-pressure applications, delivering 21 L/min at 250 bar maximum pressure. Operating at 1450 rpm with 10.29 kW power, it suits demanding…

SKU 3G-ITP-01955

Also listed as: WS0252EX000 · WS0252EX 000

Brand

Interpump

Item

PUMP WS252 R ATEX

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

250 bar

Power

10.29 kW

Speed

1450 RPM

Weight

14.5 kg

Dimensions

317.5 mm

Power

14 HP

Flow (US)

5.5 GPM

Pressure

25 MPa

Pressure

3625 PSI

Datasheet Content

WK5021




TECHNICAL INFORMATION
Flow (L/min)                        21
Flow (US Gpm)                       5,55
Rotation regime (rpm)               1450
Pressure (MPa)                      50
Pressure (bar)                      500
Pressure (psi)                      7250
Power (hp)                          28
Power (kW)                          20,59
Overall dimensions L x l x h (mm)   350x243x187,5
Weight (kg)                         21,5




WK5021                                              3/21/2026   Page 1 - 8
Copyright INTERPUMP GROUP S.P.A
WK5021

     Documents

Male shaft (key)

Male shaft (key) - Flushing




WK5021                            3/21/2026   Page 2 - 8
Copyright INTERPUMP GROUP S.P.A
Illustration Male shaft (key)




WK5021                            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

KIT180   34018001       KIT 180 SEALS D. 18           1
KIT176   34017601       KIT176 COMPLETE SEALS D.18    1

KIT150   34015001       KIT 150 INTAKE/DEL.VALVE      1
61       47151022       OPEN SIDE COVER (47-66)       1
60       91489200       KEY 8(h9)X7X35 UNI 6604/A     1


59       66020035       CRANKSHAFT C.19 - D. 24       1
58       90164800       OIL SEAL 30x55x7              1
57       99188400       SCREW M 6x20 UNI 5931         4
56       90391300       O-RING 67,95X2,62 (3268)      2
55       47151222       SIDE CRANKCASE COVER FOR      1
                        OIL GAUGE
54       91838000       ROLLER BEARING NJ2206EC       2
53       90387700       O-RING 39,34X2,62 (3156)      1
52       70211801       OIL SIGHT GLASS               1
51       90075600       CIRCLIP D.45 (ZJ45)           1
50       99303900       SCREW M 8x16 UNI 5931         8
49       66050066       PISTON GUIDE - S.S.           3
48       90162500       OIL SEAL 22x32x5              3
47       90912600       BUSHING 22X25X30              3
46       66010022       CRANKCASE                     1
45       99309900       SCREW M 8x35 UNI 5931         6
44       98210600       OIL DIP-STICK G3/8X80         1
43       90392200       O-RING D.133.02X 2,62(3525)   1


42       66160022       REAR COVER                    1
41       47200074       PUMP FOOT                     2
40       96710600       WASHER 10,2                   1
39       98204250       PLUG G1/4"x12                 1
38       99364400       SCREW M 10x18-5931            1
37       97740500       CONNECTING ROD-PIN D.14X39 3


36       66030001       CONNECTING ROD                3
35       96710100       WASHER D. 10X28X0.5           3
34       90358500       O-RING 10,82X1,78 (2043)      1
33       66080370       PACKING RETAINER D.18         3
32       90361600       O-RING 34,65X1,78 (2137)      3
31       90265200       SEAL D.18X26X6,5 L.P.         3
30       66216370       INTERMEDIATE RING D. 18       3




WK5021                                                            3/21/2026   Page 4 - 8
Copyright INTERPUMP GROUP S.P.A
Illustration Male shaft (key)

Pos.   Code             Description                  Qty Notes

29     90265500         PACKING 18.0x28x10.0 HP      3
                        66
28     66040309         PISTON D.18X54               3
27     90358400         O-RING D.10,82X1,78(2043)90SH 3


26     66219566         PISTON BOLT                  3
25     93185800                                      1
24     98209900         PLUG G. 3/8X13 NICKEL        1
23     98217900         PLUG G 1/2X10 NICKEL         1
22     96751400         WASHER 21,5X27X1,5           1
21     99382000                                      8
20     66210166                                      3
19     90511500         ANTI-EXTRUSION RING          3
18     90384300         O-RING 17,86X2,62 (123)      3
17     99368700                                      8
16     66220336                                      1
15     66210070                                      3
14     90516500         ANTI-EXTR.RING D.24.7x29x1.5 3


13     90385700         O-RING 23,81X2,62 (132)      6
12     36712101         INTAKE/DELIVERY VALVE        6
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      90359600                                      3
5      90511800                                      3
4      66210270                                      3
3      98197200         PLUG G1/8X8 S.S.             3
2      90357600                                      3
1      66124936                                      1




WK5021                                                           3/21/2026   Page 5 - 8
Copyright INTERPUMP GROUP S.P.A
Illustration Male shaft (key) - Flushing




WK5021                                     3/21/2026   Page 6 - 8
Copyright INTERPUMP GROUP S.P.A
Illustration Male shaft (key) - Flushing

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

KIT180   34018001       KIT 180 SEALS D. 18           1
KIT176   34017601       KIT176 COMPLETE SEALS D.18    1

KIT150   34015001       KIT 150 INTAKE/DEL.VALVE      1
61       47151022       OPEN SIDE COVER (47-66)       1
60       91489200       KEY 8(h9)X7X35 UNI 6604/A     1


59       66020035       CRANKSHAFT C.19 - D. 24       1
58       90164800       OIL SEAL 30x55x7              1
57       99188400       SCREW M 6x20 UNI 5931         4
56       90391300       O-RING 67,95X2,62 (3268)      2
55       47151222       SIDE CRANKCASE COVER FOR      1
                        OIL GAUGE
54       91838000       ROLLER BEARING NJ2206EC       2
53       90387700       O-RING 39,34X2,62 (3156)      1
52       70211801       OIL SIGHT GLASS               1
51       90075600       CIRCLIP D.45 (ZJ45)           1
50       99303900       SCREW M 8x16 UNI 5931         8
49       66050066       PISTON GUIDE - S.S.           3
48       90162500       OIL SEAL 22x32x5              3
47       90912600       BUSHING 22X25X30              3
46       66010022       CRANKCASE                     1
45       99309900       SCREW M 8x35 UNI 5931         6
44       98210600       OIL DIP-STICK G3/8X80         1
43       90392200       O-RING D.133.02X 2,62(3525)   1


42       66160022       REAR COVER                    1
41       47200074       PUMP FOOT                     2
40       96710600       WASHER 10,2                   1
39       98204250       PLUG G1/4"x12                 1
38       99364400       SCREW M 10x18-5931            1
37       97740500       CONNECTING ROD-PIN D.14X39 3


36       66030001       CONNECTING ROD                3
35       96710100       WASHER D. 10X28X0.5           3
34       90358500       O-RING 10,82X1,78 (2043)      1
33       66080370       PACKING RETAINER D.18         3
32       90361600       O-RING 34,65X1,78 (2137)      3
31       90265200       SEAL D.18X26X6,5 L.P.         3
30       66220570                                     3




WK5021                                                            3/21/2026   Page 7 - 8
Copyright INTERPUMP GROUP S.P.A
Illustration Male shaft (key) - Flushing

Pos.   Code             Description                  Qty Notes

29     90265500         PACKING 18.0x28x10.0 HP      3
                        66
28     66040309         PISTON D.18X54               3
27     90358400         O-RING D.10,82X1,78(2043)90SH 3


26     66219566         PISTON BOLT                  3
25     93185800                                      1
24     98209900         PLUG G. 3/8X13 NICKEL        1
23     98217900         PLUG G 1/2X10 NICKEL         1
22     96751400         WASHER 21,5X27X1,5           1
21     99382000                                      8
20     66210166                                      3
19     90511500         ANTI-EXTRUSION RING          3
18     90384300         O-RING 17,86X2,62 (123)      3
17     99368700                                      8
16     66220336                                      1
15     66210070                                      3
14     90516500         ANTI-EXTR.RING D.24.7x29x1.5 3


13     90385700         O-RING 23,81X2,62 (132)      6
12     36712101         INTAKE/DELIVERY VALVE        6
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      90359600                                      3
5      90511800                                      3
4      66210270                                      3
3      98197200         PLUG G1/8X8 S.S.             3
2      90357600                                      3
1      66125136                                      1




WK5021                                                           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 WS252 R ATEX pump used for?

The Interpump WS252 R ATEX is an industrial reciprocating pump for high-pressure applications up to 250 bar. It is used in hydraulic systems, process plants, and explosion-proof environments requiring certified ATEX equipment. Typical uses include pressure washing, water jetting, and fluid transfer in hazardous areas.

What are the specifications of the Interpump WS252 R ATEX pump?

The Interpump WS252 R ATEX delivers 21 L/min at 250 bar maximum pressure, operating at 1450 rpm with 10.29 kW power. It weighs 14.5 kg and has overall dimensions of 317.5 mm. The pump features a male shaft with key and is designed for demanding industrial applications.

Where to buy the Interpump WS252 R ATEX pump in Singapore?

You can source the Interpump WS252 R ATEX pump through 3G Electric in Singapore. We handle logistics, customs clearance, and delivery to your facility. Contact our team for pricing and lead time on this Interpump reciprocating pump for high-pressure ATEX applications.

How to maintain the Interpump WS252 R ATEX pump?

Regular maintenance includes checking oil level via the sight glass and dip-stick, inspecting seals and packings (e.g., KIT 3 oil seal D.30x55x7), and replacing worn pistons and valves. Always follow Interpump's manual for torque specs and use genuine parts to ensure ATEX compliance and safe 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 WS252 parts list — 128 parts, 62 available in catalog

Official Parts List

WS252 — Male shaft (key) exploded diagram

Repair Kits — Order These for Routine Maintenance

KIT1

KIT 1 INTAKE/DELIVERY VALVE

34000101×1Available

Interpump PUMP WS252 R ATEX

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

Recommended Spare Parts

Interpump Products

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