Valve and Pump Manufacturing
Valve and pump builders need bar and forged stock in the specific grade, condition and tolerance their machining cells expect, delivered predictably. Trim material frequently differs from body material, and the hardness differential between seat and disc has to be maintained. Shafts additionally require the strength and straightness that only a controlled delivery condition provides.
What gets specified in valves & pumps
Ordered by how commonly they are called for in this sector.
- UNS S31600 / S31603316 / 316LPREN 25
304 plus 2–3% molybdenum. The standard answer to chlorides and mild acids.
- UNS S1740017-4 PHPREN 20
Martensitic PH grade. Machine soft, then age to tensile strengths above 1300 MPa.
- UNS S30300303PREN 18
304 with sulphur added for machinability. The free-machining austenitic.
- UNS S31803 / S32205 / S32550 / S32750 / S32760Duplex / Super DuplexPREN 41
Roughly equal austenite and ferrite. Around twice the yield strength of 316L.
- UNS S40900 / S41000 / S43000400 SeriesPREN 17
Ferritic and martensitic chromium grades. Magnetic, nickel-free, hardenable.
- UNS N08020Alloy 20PREN 30
Nickel-iron-chromium with copper and niobium. Developed for sulphuric acid.
Applications
05- Valve bodies and bonnets
- Valve stems and spindles
- Pump shafts and impellers
- Seat rings and discs
- Bushes and housings
Governing standards
04- ASME B16.34
- ASTM A276
- ASTM A564
- API 6D
Verification available
10- Spectrometer
- Chemical Testing Laboratory
- Positive Material Identification (PMI)
- Spectro Test
- Tensile Testing Machine
- Hardness Testing Machine
- Portable Hardness Tester
- Flattening Test
- Reverse-Bend Test
- Hydrostatic Test Machine
What valves & pumps buys
Other industries
Supplying into valves & pumps?
Send the specification and service conditions. We will confirm the grade, the availability and the documentation you will need.