Technocast Foundry casts pump casings, volutes, impellers, valve bodies, bonnets and flanged fittings in grey iron, ductile (SG) iron, cast steel and stainless grades. PED certified, pressure tested on site, and machined complete at Arasur, Coimbatore, Tamil Nadu, India.
Pumps and Valves
Pressure-tight castings for the flow industry, poured and proven in Coimbatore.
Pumps and valves are about 15 per cent of everything we pour, and it is work Coimbatore knows well - the district is one of India’s main pump manufacturing centres, and our plant at Arasur sits inside it. Typical parts are pump casings and volutes, impellers and diffusers, valve bodies and bonnets, bearing housings, flanged fittings and base plates.
A pump or valve casting fails on porosity long before it fails on strength. That is why these parts are moulded with tight gating and checked all the way through: ultrasonic and magnetic particle inspection in house, and a pressure testing rig on site so leaks are found here, not on your assembly bench.
We hold PED certification, which is what lets a casting go into pressure-bearing equipment sold in the European Union. Flow-industry approvals are held with international pump and valve manufacturers. Grey iron, ductile (SG) iron, cast steel including ASTM A216 WCB, and stainless grades such as CF3M are all poured here.
What We Make
Casings, volutes, impellers, valve bodies and flanged fittings across iron and stainless grades.
Why Flow Buyers Come Here
A pressure certificate, proof the casting is sound, the right grade, and finished flange faces. All four are handled on one site.
The Pressure Equipment Directive certificate is what allows a casting to go into pressure-bearing equipment sold in the European Union. It sits alongside ISO 9001, ISO 14001, ISO 45001 and IATF 16949.
A pressure testing rig on site means bodies and housings are proved before they ship. Ultrasonic and magnetic particle inspection are also in house; radiography is arranged through an accredited partner when the drawing calls for it.
Grey iron for damping and cost, ductile (SG) iron for strength, cast steel including ASTM A216 WCB for higher pressure and temperature, and stainless grades such as CF3M where the fluid is aggressive.
Five vertical turret lathes, thirteen turning centres and vertical turn mill to 1,750 mm diameter. Flange faces, bores and seat areas are machined on site, then checked with contour testing and ring gauge masters.
Specifications
Send a drawing and we will confirm against your part. The figures below are the working envelope at Arasur, Coimbatore.
| Item | What We Offer |
|---|---|
| Materials | Grey cast iron EN-GJL-250 to EN-GJL-300, ductile (SG) iron EN-GJS-400-18 to EN-GJS-900-2, cast steel to IS 1030 and ASTM A27 / A148 / A216 including WCB, and stainless grades such as CF3M |
| Typical part weight | 1 kg to 1,500 kg in a single piece |
| Moulding routes | DISA MATCH 130 high pressure for volume parts, ARPA 450 and ARPA 1300 for mid weights, Alpha-set No Bake for large casings and base plates |
| Core making | Five cold box shooters from 5 kg to 30 kg, a 5 kg shell core shooter, and a four-table CO2 facility for the internal passages |
| Heat treatment | Stress relieving, normalising, annealing, hardening and tempering, and induction hardening |
| Machining | 5 VTL, 13 turning centres, 20 VMC with 4th axis and through-coolant, 4 HMC including a five-axis, and vertical turn mill to 1,750 mm diameter |
| Non-destructive testing | Ultrasonic and magnetic particle inspection in house. Radiographic inspection through an accredited partner when specified |
| Pressure testing | On our own rig at Arasur, to the pressure and hold time on your drawing |
| Certification | PED, plus ISO 9001:2015, ISO 14001:2015, ISO 45001:2018 and IATF 16949:2016 |
| Supply condition | Raw casting, machined, painted, or fully assembled and tested |
Applications
Six part families we run regularly for pump and valve builders in Coimbatore, across India and overseas.
Cored casings where the internal passage decides the pump curve. Cast in iron or steel, machined on the vertical turret lathes and pressure tested before despatch.
Thin, cored sections that have to be sound and balanced. Dynamically balanced to 1 gram where the drawing calls for it.
Gate, globe and butterfly bodies in iron, cast steel and stainless grades. Seat and flange faces machined here, then pressure tested to your specification.
Grey and ductile iron housings where bore concentricity and face flatness decide how long the bearing lasts.
Flanged pipe fittings, bends and elbows, faced and drilled to standard or to your own flange pattern.
Large grey iron and fabricated base plates, floor moulded up to 1,500 kg, stress relieved and machined flat so the pump and motor stay aligned.
Quality Gates
Six checks between the furnace and the packing bay, ending with a pressure test. A part that fails one does not move to the next.
Every heat is read on an ARL spectrometer before pouring, and the result is recorded against the batch.
Ductile iron is checked by ultrasonic velocity, then confirmed under a microscope with image analyser for graphite shape and count.
Tensile strength, elongation and hardness are tested on samples poured from the same heat as your castings.
Bores, flange faces and seat areas are proven on Brown and Sharpe coordinate measuring machines, with contour testing and ring gauge masters for profiles.
Ultrasonic and magnetic particle inspection in house. Radiographic inspection through an accredited partner when the drawing calls for it.
Bodies and casings are pressure tested on our own rig to the pressure and hold time you specify, then painted, packed and documented.
Common Questions
At 127/3B, Sangothipalayam Road, Arasur, Coimbatore, Tamil Nadu 641407, India – inside one of India’s main pump manufacturing districts. Foundry, machine shop, pressure testing and inspection are all on one 523,200 sq ft site.
Yes. Technocast holds PED certification, which is what allows a casting to go into pressure-bearing equipment sold in the European Union, alongside ISO 9001:2015, ISO 14001:2015, ISO 45001:2018 and IATF 16949:2016.
Yes. A pressure testing rig on site tests bodies, casings and housings to the pressure and hold time on your drawing, before the part is painted and packed.
Pump casings and volutes, impellers and diffusers, valve bodies and bonnets, bearing housings and covers, flanged fittings and elbows, and pump base plates.
Grey cast iron EN-GJL-250 to EN-GJL-300, ductile (SG) iron EN-GJS-400-18 to EN-GJS-900-2, cast steel to IS 1030 and ASTM A27, A148 and A216 including WCB, and stainless grades such as CF3M.
Yes. Stainless grades including CF3M are poured for valve bodies and other flow components where the fluid is aggressive.
Ultrasonic and magnetic particle inspection are done in house, followed by pressure testing. Radiographic inspection is arranged through an accredited partner when the drawing calls for it.
Up to 1,500 kg in a single piece. Large casings and base plates are floor moulded at 2,000 x 2,000 x 700 mm, stress relieved and then machined flat.
Yes, in India and overseas. Around 25 per cent of output stays in India and the rest is exported, mainly to the United States, Europe and the rest of Asia.
Certifications
Send a Drawing
Send the drawing with the material grade, the test pressure and hold time, the single-piece weight and the annual volume. You get back the moulding route, a lead time and a price.
Before you go
Our brochure and every current certificate, in PDF, for your vendor file.
Or send us a drawing
