EVAK Stainox 5.20 400v - Anglian Pumping Services

Name: EVAK Stainox 5.20 400v
Brand: EVAK
SKU: evakstainox5.20400v
Price: 1353.6 GBP
Availability: InStock

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Established 1975
Trusted by thousands of customers

The Evak Stainox 5.20 (400V) is a fully cast AISI 316 stainless steel submersible sewage pump for arduous contaminated water, corrosive effluent, and heavier-duty solids handling. 1.5 kW / 2 HP three-phase 400V motor, 2″ or 3″ elbow discharge, vortex impeller with 45 mm solids handling.

A significant jump from the 5.10 — 630 L/min max flow at 19 m max head, and the free-passage steps up from 35 mm to 45 mm for coarser sewage and effluent solids. Three-phase operation draws just 10.5 A at full load with smoother start-up and no capacitor. First pump in the range fitted with the larger SQM seal frame. Manual operation only.

1.5 kW

Motor output

630 L/min

Max flow

19 m

Max head

45 mm

Solids handling

400V 3-phase
Cast 316 SS
Vortex impeller
Twin SiC seals
Viton throughout
2″ or 3″

Three-phase supply required — manual operation only (no float-switch auto variant on 3-phase). Uses SQM seal frame — requires the SQM Guiderail Kit for auto-coupling installation (the SQS kit fits 5.05/5.10 only). For 230V single-phase supply (with optional auto float switch), see the 5.20 (230V).

Full Description

More about this product

Full Description

The Evak Stainox 5.20 (400V) is the 2 HP three-phase variant in Evak’s fully cast AISI 316 stainless steel submersible sewage pump range, and marks the range’s transition from light-duty to full sewage-station capability. Manufactured by lost-wax casting for high dimensional accuracy, the entire pump — body, impeller, motor housing, cover, shaft, rotor, and handle — is 316 SS. A 1.5 kW / 2 HP 2-pole three-phase motor drives a vortex impeller through a shaft supported by long-life ball bearings.

Two significant changes from the 1 HP 5.10 make this a genuine step-up rather than an incremental variant: the free passage opens up from 35 mm to 45 mm, letting the pump handle coarser typical sewage solids without the risk of clogging, and the pump is available with either 2″ or 3″ elbow discharge so you can size for higher flow or higher lift depending on the duty. Maximum delivery reaches 630 L/min at 19 m head — 34% more flow and 36% more lift than the 5.10.

Combined with Viton gaskets, O-rings, lip seal, and cable gland throughout, the Stainox 5.20 handles environments that would rapidly corrode a cast iron pump — making it the working choice for chemical, pharmaceutical, food-industry, marine, and treatment-plant duties at genuine sewage-station scale. Three-phase 400V operation delivers smoother start-up, no starting capacitor, and simpler motor construction than single-phase — suits installations with dedicated 3-phase distribution and appropriately-rated motor starters. An SQM-80 series double mechanical seal — upper Ca/Ce, lower SiC/SiC by EKK Eagle Burgmann — runs in an oil chamber for reliability. Class F insulation replaces the Class B used on the 5.05/5.10 (better thermal margin for higher-power operation). Optional epoxy-based nano-coating and acid/alkali-resistant cable sleeve extend service life in the most aggressive environments.

Key features

1.5 kW

Motor output

2 HP

Horsepower

10.5 A

FLA @ 400V

2″ or 3″

Elbow discharge

630 L/min

Max flow

19 m

Max head

45 mm

Free passage

32.8 kg

Weight

Duty point: Rated 375 L/min at 12 m head (best efficiency). Maximum 630 L/min or 19 m head at extremes of the curve.

Construction

Fully cast 316 stainless steel

Lost-wax cast AISI 316 SS throughout — pump casing, impeller, motor housing, cover, shaft, rotor, and handle. Full corrosion resistance in chemical and marine environments.

45 mm free-passage vortex

Non-clogging vortex design with enlarged 45 mm free passage — handles coarser sewage solids than the 35 mm 5.05/5.10.

2″ or 3″ elbow discharge

Choose 2″ for higher head or 3″ for higher flow on the same motor. Elbow-type discharge (not flange) suits both direct pipework and guiderail claw fitment.

SQM-80 twin SiC seal

EKK Eagle Burgmann SQM-80 double mechanical seal — upper Ca/Ce, lower SiC/SiC — running in oil chamber with Viton lip seal. Larger frame than the 5.05/5.10 SQS-50.

Class F insulation

Upgraded from Class B used on the 5.05/5.10 — better thermal margin for continuous-duty operation at 2 HP and above.

Three-phase advantage

Smoother start-up, no starting capacitor, and simpler motor construction than single-phase — suits installations with dedicated 3-phase distribution.

Applications

Chemical & pharmaceutical

Drainage of process water and effluent in chemical plants, laboratories, and pharmaceutical manufacturing at station scale.

Corrosive wastewater

Wastewater with corrosive contaminants that would attack cast iron pumps — industrial cleaning, plating, food processing effluent.

Wastewater treatment plants

Treatment plant sumps, transfer stations, and effluent handling where 316 SS is specified and solids handling matters.

Marine & coastal

Salt water bilge, harbour, and marina sumps where chloride corrosion is a concern.

Food industry effluent

Dairy, brewery, and food-processing effluent handling where hygiene and corrosion resistance are both critical.

Three-phase 400V supply required — manual operation only. Float-switch auto operation is not available on the three-phase model; use with a suitable motor starter and level controller. Uses the SQM (not SQS) seal frame — requires the SQM Guiderail Kit for auto-coupling installation. Maximum liquid temperature 40 °C. Maximum submersion depth 10 m. Not for potable water. For 230V single-phase supply (with optional auto float switch), see the Stainox 5.20 (230V). For lower duty (1 HP), see the 5.10. For higher head at same discharge sizes, see the 5.30 (3 HP). For non-corrosive sewage duties on cast iron, see the Evak Hippo range.

Technical specifications

Model	50STEEL-5.20T / 80STEEL-5.20T
Series	Evak Stainox — Cast 316 SS submersible sewage
Voltage / phase	400V three-phase
Motor output	1.5 kW (2 HP)
Full load amps	10.5 A
Frequency	50 Hz
Poles / speed	2 pole / 2850 rpm
Motor type	Dry type
Operation	Manual (no float-switch auto on 3-phase)
Discharge	50 mm (2″) or 80 mm (3″) elbow type
Rated head / flow	12 m @ 375 L/min
Max head	19 m
Max flow rate	630 L/min
Free passage (solids)	45 mm
Max liquid temperature	40 °C (0–40 °C range)
Max submersion depth	10 m
Insulation class	Class F
Protection	IP68
Thermal protection	Klixon auto-cut
Bearings	Long-life ball type
Impeller	Vortex, AISI 316 stainless steel
Body construction	Loss-wax cast AISI 316 stainless steel throughout
Mechanical seal	SQM-80 double mechanical (upper Ca/Ce, lower SiC/SiC) — EKK Eagle Burgmann
Gaskets, O-rings, lip seal, cable gland	Viton (fluoroelastomer)
Cable	H07RN-F, 10 m standard
Dimensions (H × H1)	660 × 534 mm
Weight (without cable)	32.8 kg
Optional extras	Epoxy nano-coating · Acid/alkali-resistant cable sleeve · Quick Discharge Connection (QDC) · Stainox SQM Guiderail Kit

Delivery Information

Standard delivery:
Standard delivery is free on most orders. Some items may incur a delivery charge depending on weight, size or value. Any applicable charge will be displayed at checkout.

Deliveries will typically be made between 7am and 6pm, Monday to Friday (excluding public holidays).

Next day delivery:
Next working day delivery is available for a £16.50 + VAT delivery charge.

Orders must be placed before 12 noon to qualify for next working day delivery. Orders placed after 12 noon on Thursday but before noon on Friday will be delivered the following Monday. Orders placed after 12 noon on Friday will be delivered on Tuesday.

Pallet/Large/Difficult items:
Some large, heavy or difficult to transport items may incur an additional delivery charge. Please contact us for a delivery quote before ordering.

Frequently Asked Questions

Quick answers to common questions about the EVAK Stainox 5.20 400v. For technical specifications, see the product details above; for sizing or installation advice, contact our team. If you have any other questions, we're happy to help.

What is a submersible pump?

A submersible pump is designed to operate fully submerged in the liquid it is moving. The motor is sealed inside the pump body and cooled by the surrounding water. Submersibles are used for drainage, sewage, septic tanks, deep wells and boreholes, and for raising water from sumps, cellars and floodwater. Many stocked at Anglian Pumping handle solids in suspension.

Can submersible pumps handle solids and sewage?

Yes – some submersibles are designed for clean water only, others handle solids up to 50 mm or full raw sewage. Anglian Pumping stocks ABS, BBC, Flygt and T-T Submersibles ranges that include vortex, single channel and grinder impellers for different solids handling requirements. Always match the pump to the maximum solid size and the type of effluent it will see.

When should I use a submersible pump instead of a surface pump?

Use a submersible when the water level is more than around 8 metres below the pump installation point – surface pumps cannot self-prime beyond that depth. Submersibles are also better when the liquid contains solids, when noise must be minimised, or when the pump needs to operate in confined spaces such as sumps and chambers where a surface pump would not fit.