Hydraulic Valve Body — Oil & Gas Grade
Precision-machined valve body for hydraulic and pneumatic control valves in oil and gas production equipment. Alloy steel or stainless.
// Reference Parts
Workshop & product library photos
These images show the type of work EKINSUN can quote from drawings, samples, photos, rough sketches, or existing parts.
Pump Impeller — 5-Axis Steel
5-axis milled steel pump impeller for centrifugal and turbine pumps. Produced from tool steel, alloy steel or duplex stainless on request.
Turbine Impeller — Top View
Precision machined turbine impeller: blade profile, bore and hub machined to close tolerance. Common material: 316L, duplex stainless or 4140 steel.
Stainless Threaded Pipe Coupling Batch
Batch of 316L stainless threaded pipe couplings to NPT or BSP standard. Used in process piping, instrumentation and control lines.
Pump Shaft — Deep Hole Precision
Deep-hole drilled and precision-ground pump shafts for centrifugal and positive displacement pumps in upstream and downstream oil and gas.
Keyway Drive Shafts — Batch Production
Precision keyway shafts for pump and compressor drives. Machined from 4140 or 17-4 PH stainless; heat treatment on request.
BSP / NPT / Metric Thread Adapters
Custom thread adapters for connecting metric, BSP and NPT fittings in process pipework. 316L stainless as standard; alloy steel on request.
Instrument & Sensor Fittings — Batch
Precision sensor and instrument fittings for pressure, temperature and flow instrumentation in oil and gas process lines.
Quality Inspection — Oil & Gas Parts
All EKINSUN parts are subject to dimensional inspection and traceability. Material certs (3.1 certificates) available on request for critical applications.
CNC Machined Parts for Oil & Gas Applications
Oil and gas production, processing and distribution impose strict requirements: high pressures, corrosive media (H₂S, CO₂, chlorides), cyclic mechanical loading, high temperatures and remote locations where field failures are expensive. CNC machined parts in this sector must be made from the right material, machined to tight tolerances, and traceable to material certification standards. EKINSUN manufactures to these requirements across upstream, midstream and downstream applications.
Materials for Oil & Gas Parts
- 316L / 316 Stainless Steel — the baseline material for corrosion-resistant instrumentation fittings, sensor housings and process connections. PREN ~24 in seawater-exposed environments — acceptable for most onshore/mild offshore service.
- Duplex 2205 / Super Duplex 2507 — for high-chloride environments (subsea, high-salinity produced water); PREN >35 for 2205, >40 for 2507. We machine both grades on request.
- 4140 / 4340 Alloy Steel — pump shafts, valve bodies, drill collars and downhole tooling where high yield strength and toughness are required; heat-treated and surface-treated (nickel, chrome, phosphate) as needed.
- Inconel 625 / 718 — for high-temperature, high-corrosion applications (flare tips, wellhead parts, downhole tools in HPHT wells); expensive to machine but chemically inert to virtually all produced fluids.
- PTFE / PEEK — for valve seats, seals and insulators where chemical resistance is paramount and metal-to-metal contact is to be avoided.
Common Oil & Gas CNC Part Requests
- Pump impellers and wear rings — centrifugal and progressing cavity pumps in 316L, duplex or 4140
- Valve bodies and spools — gate, globe, ball valve internals in alloy steel and stainless
- Instrumentation and sensor fittings — NPT and BSP instrument connections, thermowell bodies, orifice plate flanges
- Thread adapters and pipe reducers — cross-standard adapters connecting legacy imperial and metric systems on existing plant
- Replacement parts from sample — obsolete pump components, valve internals and fittings reproduced from worn originals when OEM drawings are unavailable
- Downhole tooling components — mandrels, centralizers, packers and fishing tool parts in 4140 or 4340
Material traceability for oil & gas. For critical applications we supply EN 10204 3.1 mill test certificates, heat number traceability and dimensional inspection reports. Specify your certification requirement in the enquiry and we will confirm scope.
Who Gets Quotes From Us?
Common scenarios where oil and gas maintenance teams, OEMs and procurement managers contact EKINSUN.
// Plant Maintenance Engineer
"Our centrifugal pump impeller failed — OEM wants 14 weeks and $8,000. We need it in 3 weeks"
Send us the worn impeller or OEM drawing. We machine a replacement from 316L, duplex 2205 or 4140 depending on the process fluid — blade profile, bore and hub to exact spec. Typical lead time 2–4 weeks. EN 10204 3.1 certs available.
// Engineering Procurement Officer
"New plant build — instrumentation is NPT but the control system is metric. Need 200 adapters"
Cross-standard thread adapters in 316L or duplex stainless — NPT to metric, BSP to NPT, any combination. We machine to your drawing or specification list. Batch of 200 in 4 weeks. Material certs and dimensional inspection reports standard.
// Pump OEM / Manufacturer
"We manufacture our own pump range — need impellers in duplex 2205, 50 pcs quarterly with 3.1 certs"
We supply pump OEMs with impellers, wear rings, shaft sleeves and valve internals on a recurring basis. Duplex, super duplex, Inconel, 4140 — any material. EN 10204 3.1 certificates and heat number traceability as standard. OEM supply from 20 pcs/quarter.
// Retrofit / EPC Contractor
"We're upgrading a 1980s refinery — drawing archive is incomplete. Need parts from worn samples"
Obsolete valve bodies, pump sleeves and instrument fittings reproduced from worn originals. We reverse-engineer from the sample, rebuild the drawing, confirm critical dimensions with you, and machine in the correct material. The sample is enough to start.
What Oil & Gas Buyers Search For
custom pump impeller manufacturer China
Inconel super duplex machined parts
duplex stainless pump impeller CNC
replacement pump impeller from sample
valve body CNC machining custom
4140 steel pump shaft manufacturer
instrument fitting NPT BSP custom
EN 10204 3.1 machined parts China
API thread adapter custom machining
replacement pump wear ring supplier
downhole tool component manufacturer
API 6A wellhead component custom
gate valve stem and seat custom
obsolete oil gas parts reproduction
centrifugal pump impeller replacement
duplex 2205 CNC machining supplier
oil gas parts made to drawing
Ordering a Machined Part for Sour Service — What Your Enquiry Must State
EKINSUN LTD is a custom parts manufacturer in Guangdong, China, machining pump, valve, instrument and downhole components to drawing or from a worn sample. On oil and gas work the material decision is settled before anything is cut — and it is settled by you, not by us. This is what the enquiry needs to state, and what each line actually changes.
| What the enquiry must state | Why it decides the part | What we do with it |
|---|---|---|
| Service classification — sour or sweet, referenced to NACE MR0175 / ISO 15156 | Acceptance for sour service is not a property of the alloy on its own: H2S partial pressure, temperature, in-situ pH and chloride content are assessed together | We do not make this call. Sour-service material selection is your process engineering responsibility — we machine to the grade and limits you specify |
| Material grade — e.g. 316/316L, duplex 2205, 4140, 4340, alloy 625 | ISO 15156-2 covers carbon and low-alloy steels; ISO 15156-3 covers stainless, duplex and nickel-based alloys | Sourced to the stated grade with mill traceability, or machined from material you supply |
| Hardness cap — with the unit (HRC, HBW or HV) | The cap applies to base metal, weld metal and the heat-affected zone, not only the finished surface | Machining and any heat treatment controlled to the stated cap; the measured value is reported back |
| Certificate level — EN 10204 3.1 or 3.2 | 3.1 is issued by the manufacturer's own inspection function; 3.2 requires countersignature by an independent party present during production | 3.1 available — state the scope in the enquiry. 3.2 cannot be added after the parts are made — raise it before production so we can confirm whether it can be met |
| Heat number traceability — required or not | Ties the finished part back to one specific melt | Heat number recorded and carried onto the certificate |
| Dimensional inspection report — required or not | Decides whether critical dimensions are measured and recorded individually or sampled | Report supplied listing critical dimensions against your drawing |
| Nothing but a worn part — no drawing, no grade, no spec sheet | The usual case on obsolete pump internals, valve trim and legacy instrument fittings where the OEM is gone | Send the sample — we measure it and rebuild the geometry. The material and any sour-service duty still have to be confirmed by you before cutting |
Two things this table deliberately does not do: it gives you no H2S, temperature or pH limits, and it does not tell you which alloy to pick. Those come from the standard and from your own process data — a machine shop that hands you a number for either is guessing with your plant. What we do own is everything after the grade is fixed: machining to your drawing or your worn sample in 4140, duplex, 316L or nickel alloy, at the certification level you asked for, including parts rebuilt from a sample when the drawing no longer exists. Send the drawing or the part and you get a quote within 12 hours.
// Related services
Replacement Parts
Pump internals, valve bodies and fittings reproduced from worn samples.
View service →4140 Steel Machining
Pump shafts, valve bodies and downhole tooling in 4140 alloy steel.
Material guide →