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Square Casing

A squared outer shell for booster sets where the footprint is fixed.

Square Casing

A squared outer shell for booster sets where the footprint is fixed.

The volute inside is the same spiral as any other casing — the difference is on the outside. Squaring the shell lets two or three pumps sit side by side on a skid without the wasted space a round body leaves between them.

Flat outer walls also give somewhere to cast the mounting bosses and the nameplate pad, so they do not have to be welded on afterwards. On a pressure-carrying part that matters: a welded boss is a heat-affected zone on the outside of the pressure boundary.

Casting process	Vertical-line sand moulding on two lines (national patent)
Materials	Grey iron · ductile iron · WCB carbon steel · CF8M stainless
Machined features	Joint face and bolt circle · suction and discharge bores · mounting boss faces · register
Minimum order	100 pieces
Certification	EN 10204 3.1 per heat, spectrometer results
Source of geometry	Your drawing, 3D file or a worn sample

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Casting Notes

What Is Difficult About This One

Every casting has one or two features that decide whether the batch repeats. On this part they are these.

Flat walls want to bow

Large flat sections cool unevenly and pull. Internal ribs plus a gating layout that fills the corners last is what keeps the joint face flat enough to machine.

Every internal corner gets a radius

A sharp corner inside a casting this shape is where the crack starts after a few thousand pressure cycles. Radii go in at pattern stage, not with a grinder afterwards.

Volute core in a square box

The core print has less room than in a round body, so its location has to be held tighter — otherwise the wall thickness goes uneven around the spiral.

Materials

Alloy Options

The same geometry is a different part in three different plants. Chloride content, abrasion and temperature drive the choice — not the name of the fluid.

Alloy	Grade	When it is the right choice
Grey iron	HT200 / HT250	Default for water duty. Damps vibration, machines easily, lowest cost.
Ductile iron	QT450 / QT500	When the duty is cyclic or the part takes shock. Tougher than grey.
WCB carbon steel	ASTM A216 WCB	Higher strength, weldable. For pressure-bearing bodies.
CF8M stainless	ASTM A743 CF8M	Chloride and corrosion duty — the cast equivalent of 316.

Enquiry

What to Send Us

These are the ones specific to this part. A drawing, a 3D file or the worn original covers all of them at once.

Item	Why it matters
Footprint limit	The dimension that made you want a square body rather than a round one
Suction and discharge sizes	Thread or flange standard, and which side each sits on
Volute profile	A drawing or the worn casing — we reconstruct from either