Twin-Outlet Pump Head
Two discharge ports coming off one chamber, with the parting line forced to run between them. That single constraint is most of the tooling work in this part.
With one outlet you put the parting line wherever the draw is easiest. With two, the line has to thread between both ports and still leave draft on each. Get it wrong and you are either pulling a loose piece for every mould or cleaning a flash line off the inside of a port that nobody can reach.
The envelope is 135 × 112 × 213 mm at around 3.0 kg in grey iron. Both ports are cored and finish-machined; the chamber face behind them is on the same bolt circle as the single-outlet bodies in this family.
| Envelope | 134.7 × 111.9 × 212.9 mm |
| Cast volume | 421.9 cm³ |
| Weight, grey iron | approx. 3.04 kg as-cast |
| Casting process | Vertical-line sand moulding on two lines (national patent) |
| Materials | Grey iron · ductile iron · WCB carbon steel · CF8M stainless |
| Machined features | Both outlet bores and threads · chamber face and bolt circle · top 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 |
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.
Parting line between the ports
Both ports draw from the same line with draft on each. This is decided at pattern stage — it cannot be fixed later on the moulding line.
Two cores, one print
The outlet passages share a core print so they cannot be assembled out of position relative to each other.
Flow split has to be symmetric
The two passages are cast, not machined. If the cores shift, one outlet flows more than the other and no amount of machining afterwards puts it back.
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. |
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 |
|---|---|
| Outlet spacing and thread | Centre-to-centre plus the thread standard on each |
| Whether both outlets are live | Some builds plug one — it changes nothing in the casting but everything in the test |
| Chamber bolt circle | Tells us whether it mates to the covers you already stock |
Related Castings
Other parts in the same range — all shown as 3D models you can turn.
