EVAK Stainox 5.50 400v - Anglian Pumping Services

Name: EVAK Stainox 5.50 400v
Brand: EVAK
SKU: evakstainox5.50400v
Price: 2307.6 GBP
Availability: InStock

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Established 1975
Trusted by thousands of customers

The Evak Stainox 5.50 (400V) is a heavy-duty fully cast AISI 316 stainless steel submersible sewage pump for major corrosive-fluid and effluent duties. 3.7 kW / 5 HP three-phase 400V motor, 3″ or 4″ elbow discharge, vortex impeller with 45 mm solids handling.

A serious step up from the 3 HP 5.30 — 1,000 L/min max flow at 22 m max head. Suits major sewage stations, industrial wastewater plants, and food-industry installations where a 2 or 3 HP pump can’t sustain the duty. Three-phase supply required, manual operation, SQM seal frame.

3.7 kW

Motor output

1,000 L/min

Max flow

22 m

Max head

45 mm

Solids handling

400V 3-phase
5 HP heavy-duty
Cast 316 SS
Vortex impeller
Twin SiC seals
3″ or 4″

Three-phase supply required — manual operation only. 3.7 kW motor requires appropriately-rated cabling and motor starter. Uses SQM seal frame — requires the SQM Guiderail Kit for auto-coupling installation. For lower duty (3 HP), see the 5.30. For higher duty (7.5 HP), see the 5.75.

Full Description

More about this product

Full Description

The Evak Stainox 5.50 (400V) is the 5 HP heavy-duty variant in Evak’s fully cast AISI 316 stainless steel submersible sewage pump range — the point where the range moves fully into industrial territory. 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 3.7 kW / 5 HP 2-pole three-phase motor drives a vortex impeller through a shaft supported by long-life ball bearings.

Compared with the 2.2 kW 5.30, this pump delivers 1,000 L/min at up to 22 m of head — 43% more flow and only slight loss of head margin for the extra 68% motor power. Available with 3″ or 4″ elbow discharge: choose 3″ for higher head, 4″ for higher flow. Suits major corrosion-critical duties — industrial effluent plants, chemical processing wastewater stations, food-industry treatment, and marine installations where cast iron would fail rapidly.

Combined with Viton gaskets, O-rings, lip seal, and cable gland throughout, the Stainox 5.50 handles environments that would rapidly corrode a cast iron pump. 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-100 series double mechanical seal — upper Ca/Ce, lower SiC/SiC by EKK Eagle Burgmann — runs in an oil chamber for reliability. Class F insulation for continuous-duty operation at 5 HP. Optional epoxy-based nano-coating and acid/alkali-resistant cable sleeve extend service life in the most aggressive environments.

Key features

3.7 kW

Motor output

5 HP

Horsepower

7.2 A

FLA @ 400V

3″ or 4″

Elbow discharge

1,000 L/min

Max flow

22 m

Max head

45 mm

Free passage

48 kg

Weight

Duty point: Rated 500 L/min at 13 m head (best efficiency). Maximum 1,000 L/min or 22 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 at industrial scale.

45 mm free-passage vortex

Non-clogging vortex design with 45 mm free passage — handles coarser sewage solids reliably at sustained industrial duty.

3″ or 4″ elbow discharge

Choose 3″ for higher head or 4″ for higher flow on the same motor. Elbow-type discharge suits both direct pipework and guiderail claw fitment.

SQM-100 twin SiC seal

EKK Eagle Burgmann SQM-100 double mechanical seal — upper Ca/Ce, lower SiC/SiC — running in oil chamber with Viton lip seal. Heaviest seal frame in the SQM series.

Class F insulation

Class F thermal margin for sustained industrial-duty operation at 5 HP under continuous load.

Three-phase efficiency

Smoother start-up, no starting capacitor, and lower running current per phase than single-phase equivalents. Requires 400V distribution.

Applications

Major chemical & pharmaceutical

Large-scale process water and effluent handling in chemical plants and pharmaceutical manufacturing.

Industrial corrosive wastewater

Heavy-duty industrial wastewater with corrosive contaminants — plating plants, industrial cleaning, aggressive food-industry effluent.

Wastewater treatment stations

Municipal and industrial treatment plant sumps, transfer stations, and effluent handling where 316 SS is specified at scale.

Marine & coastal industrial

Large marina, harbour, and coastal industrial installations where sustained saltwater corrosion resistance is essential.

Food industry at scale

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

Three-phase 400V supply required — manual operation only. 3.7 kW motor requires appropriately-rated cabling, isolation, and motor starter. Float-switch auto operation is not available. Uses the SQM 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 lower duty (3 HP), see the Stainox 5.30. For higher duty (7.5 HP), see the 5.75. For non-corrosive sewage duties on cast iron, see the Evak Hippo range.

Technical specifications

Model	80STEEL-5.50T / 100STEEL-5.50T
Series	Evak Stainox — Cast 316 SS submersible sewage
Voltage / phase	400V three-phase
Motor output	3.7 kW (5 HP)
Full load amps	7.2 A
Frequency	50 Hz
Poles / speed	2 pole / 2850 rpm
Motor type	Dry type
Operation	Manual (no float-switch auto on 3-phase)
Discharge	80 mm (3″) or 100 mm (4″) elbow type
Rated head / flow	13 m @ 500 L/min
Max head	22 m
Max flow rate	1,000 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-100 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)	739 × 574 mm
Weight (without cable)	48 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 5.50 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.