OEM / Custom Manufacturing
You supply the drawing or datasheet—we manufacture the construction, materials, interfaces, tests, and documents agreed on the PO.
API 6D
API 600
API 602
API 608
API 607
CE / PED
ISO 9001
ISO 15848-1
Certificate names match our published scope—request current PDFs and check expiry and product coverage before award.
OEM / ODM delivery model
One project workflow from specification to release
We start from your datasheet, GA, standards, ITP, and document index—then lock the workflow in writing.
Private Label / Branding
The buyer owns the market-facing brand. The scope adds approved nameplates, marking, colors, packaging and document templates to an agreed product or custom specification.
One project can use both models: OEM defines the technical manufacturing basis, while private label defines how the finished valve is identified and packaged for the buyer's market.
- 01
Requirement review
We consolidate valve type, medium, size, class, materials, standards, drawings, inspection points, and your document index in one requirement review.
- 02
Engineering definition
Construction, trim, sealing, actuation, interfaces, marking and the document list are confirmed before release.
- 03
Sample or first article
For new configs or private-label lines we agree tooling, samples, or first-article inspection before mass production—scope is written on the quote.
- 04
Controlled production
Incoming material, machining, assembly, scoped NDT, and pressure tests follow the requirement set you approved at engineering freeze.
- 05
Documented release
Final marking, packing and the agreed manufacturing record package are checked before dispatch authorization.
Engineering definition
Turn service conditions into a manufacturable valve requirement
We begin with your project spec—FEA, CFD, and calc packages run only if you include them in the technical scope.
Drawing & data-sheet review
Confirm the valve construction and identify conflicts between service conditions, project specifications and requested interfaces.
Material selection support
Align body, trim, seat and sealing materials with pressure, temperature, corrosion, abrasion and low-temperature requirements.
Actuation & accessories
Coordinate manual, pneumatic, electric or hydraulic actuation with available connection and control requirements.
Manufacturability review
Check dimensions, machining access, welding, assembly and inspection feasibility before production release.
CONTROLLED QUALITY & MANUFACTURING ROUTE
A Controlled 12-Step Valve Manufacturing & QA/QC Route
From engineering freeze through API 598 and MDR, each step has a quality gate, calibrated gear, and a record you can file.
Your approved drawings and ITP govern every stage—we compile hydro, NDT, and material records into the MDR before dispatch.
STEP 01
Contract & Engineering Freeze
Freeze approved GA drawings, datasheets, BOM, and ITP hold/witness points (H/W/R). Establish full material traceability protocols and QA inspection matrices before manufacturing release.
- Standard
- API / ASME / ISO
- Deliverable
- Frozen ITP & VDS
STEP 02
Casting, Forging & Heat Treatment Control
Monitor pressure-retaining blanks from audited foundries. Verify heat treatment cycles (Normalizing, Quenching, Tempering) against ASTM A216/A105/A182 and archive automated time-temperature charts.
- Standard
- ASTM A216 / A105
- Verification
- Time-Temp Chart
STEP 03
Incoming IQC & Material Traceability
100% physical heat number verification and 100% portable PMI chemical spectrometry on alloy/stainless trim. Reconcile raw mill test certificates against EN 10204 3.1 with strict quarantine segregation.
- Method
- 100% Handheld PMI
- Standard
- EN 10204 3.1 MTC
STEP 04
Volumetric & Surface NDT
Execute non-destructive examination (PT/MT for casting surface, UT/RT for heavy-wall critical sections) per ASME Section V. All inspections evaluated by certified ASNT/ISO Level II/III inspectors.
- NDE Code
- ASME Section V
- Inspection
- PT/MT & RT/UT
STEP 05
Rough Machining & In-Process Checks
Establish datum faces, minimum wall thickness per ASME B16.34, and machining allowances. Maintain permanent heat number transfer logs across every machining operation.
- Standard
- ASME B16.34
- Control
- Min Wall & Heat Trace
STEP 06
Welding, Hardfacing & PWHT
Execute Stellite / Inconel 625 weld overlay on seating areas per qualified WPS/PQR (ASME IX). Perform mandatory PWHT stress relief, Rockwell hardness survey, and post-weld liquid penetrant inspection.
- WPS/PQR
- ASME Section IX
- Hardfacing
- Stellite 6 / Inconel
STEP 07
Finish CNC Machining & Sealing Surface Inspection
High-precision CNC machining of bores, flange serrations (Ra 3.2-6.3µm per ASME B16.5 / MSS SP-6), and fine mirror-grinding of valve balls/wedges. 100% sealing contact area verification.
- Serration
- Ra 3.2–6.3µm
- Standard
- ASME B16.5 / MSS SP-6
STEP 08
Trim & Fastener BOM Verification
Verify stem, seats, graphite packing, RTJ/spiral wound gaskets, and ASTM A193 B7/A194 2H fasteners against approved BOM. Perform hardness and dimension verification on critical trim items.
- Bolting
- A193 B7 / A194 2H
- Packing
- Die-Formed Graphite
STEP 09
Clean-Room Assembly & Torque Control
Degreased, particulate-controlled assembly following approved procedures. Apply calibrated hydraulic torque wrenches for cross-pattern bolting and travel/limit calibration.
- Assembly
- Controlled Clean-Bay
- Torque
- Calibrated Cross-Bolt
STEP 10
100% Hydrostatic, Pneumatic & Torque Testing
100% factory acceptance testing per API 598 / ISO 5208: high-pressure hydrostatic shell test (1.5x CWP), high/low-pressure bi-directional closure test, and backseat testing. Zero allowable leakage.
- Shell Test
- 1.5x CWP (Hydro)
- Seat Leakage
- Rate A (Zero Leak)
STEP 11
Surface Preparation, Coating & Marking
Surface blast cleaning to ISO 8501-1 Sa 2.5 profile. Apply C5-M marine/industrial 3-coat epoxy-polyurethane system with digital DFT measurement and MSS SP-25 compliant stamping/riveted SS316 nameplates.
- Blasting
- ISO 8501-1 Sa 2.5
- Coating
- C5-M 3-Coat + DFT
STEP 12
Final Inspection, MDR Dossier & Dispatch
Final dimensional audit, end protection, desiccated vapor-corrosion packaging in export crates. Finalize and release the 30-page Manufacturer's Data Report (MDR) with complete 3.1 MTCs and test charts.
- Dossier
- 30-Page Master MDR
- Release
- Signed IRN Release
INSPECTION & TESTING ACCEPTANCE MATRIX
ITP Hold Points & Verification Records
Each hold point on your ITP gets a pass/fail criterion and a record—we roll hydro, pneumatic, NDT, and material files into the MDR your PO lists.
| Stage / Inspection Item | Test Standard / Code | Acceptance Criteria | Point Type | Deliverable Record |
|---|---|---|---|---|
| 01. Raw Material & Blanks | ASTM A216 / A105 / A182 | 100% heat-stamp verify, PMI chemistry match, defect-free visual | H / R | EN 10204 3.1 MTC + PMI inspection record |
| 02. Volumetric & Surface NDE | ASME V / ASTM E165 / E709 | ASME VIII Div. 1 App. 4 (PT) / App. 7 (UT/RT) acceptance | W / R | Certified NDT Level II examination reports |
| 03. Critical Machining & Dimensions | ASME B16.34 / ASME B16.5 | Min wall thickness compliance, flange serration Ra 3.2–6.3µm | R | Machining dimensional & surface roughness report |
| 04. Stellite / Inconel Weld Overlay | ASME IX / NACE MR0175 | Qualified WPS/PQR, hardfacing thickness ≥1.6mm, 38–42 HRC | W / R | WPS/PQR + PWHT chart + hardness survey report |
| 05. Hydrostatic Shell Test | API 598 / API 6D / ISO 5208 | 1.5x CWP hold for specified duration; 0 visible leakage/sweating | H / W | Calibrated hydrostatic test record & chart |
| 06. High & Low Pressure Seat Closure | API 598 / ISO 5208 | 1.1x CWP hydro + 80 psi air under water; Rate A zero leakage | H / W | Pressure & leakage test certificate |
| 07. Surface Blasting & Coating | ISO 8501-1 / ISO 12944 | Sa 2.5 surface cleanliness; 3-coat marine C5-M DFT check | R / W | Surface profile & coating DFT measurement log |
| 08. Final Inspection & MDR Release | MSS SP-25 / EN 10204 3.1 | 100% SS316 riveted nameplate, end caps, desiccated export packing | H | 30-page master MDR dossier + shipping release (IRN) |
H: Hold Point (mandatory witness before next operation)W: Witness Point (notified customer/TPI inspection)R: Review Point (document & MTC audit)
Governed by project specification & ITP Rev. 1Featured OEM/ODM product capabilities
Manufacturing capability linked to valve products
See which product families tie to our machining, test, and document controls—then open the series that matches your line list.
Trunnion-Mounted Ball Valves
- Design
- API 6D · ISO 14313 · ASME B16.34
- Size & Class
- 2" – 56" · Class 150 – 2500
- Materials
- WCB / LCC / CF8M / Duplex
Pipeline isolation, DBB and severe-service projects. Fire-safe tested with complete material and pressure records.
Review product range
API 600 Heavy-Duty Gate Valves
- Design
- API 600 · ASME B16.34 · ISO 10434
- Size & Class
- 2" – 48" · Class 150 – 1500
- Materials
- WCB / WC6 / CF8M + Trim 5/8/12
Flexible wedge and through-conduit constructions for high-integrity isolation in EPC transmission systems.
Review product range
Triple-Offset Butterfly Valves
- Design
- API 609 Cat. B · ASME B16.34
- Size & Class
- 3" – 72" · Class 150 – 600
- Materials
- WCB / CF8M · Laminated SS316/Graphite
Bi-directional zero-leakage, low-torque metal seated isolation for large-diameter process and utility lines.
Review product range
Check Valves & Backflow Protection
- Design
- API 594 · API 6D · BS 1868
- Size & Class
- 2" – 36" · Class 150 – 2500
- Materials
- WCB / LCB / CF8M / Inconel Spring
Swing, dual-plate and piston check valves with complete MTC 3.1, NDT reports and pressure test charts.
Review product range
Project delivery support
Project coordination from technical review to documented delivery
We review your spec, assign the plant, track production, and match tests and records to your ITP.
✓Approved drawings and data sheets
✓Bill of materials or agreed material schedule
✓Material certificates and heat traceability
✓Dimensional and inspection records
✓Pressure and leakage test reports
✓NDT reports when specified
✓Marking, nameplate and packing requirements
✓Manufacturing record package / MDR index when agreed
Private label & configured supply
Control product identity without losing manufacturing traceability
Branding, marking, finish, packaging and document templates are defined during requirement review and released only after approval.
- •Customer brand and approved nameplate layout
- •Body marking and serial-number logic
- •Specified paint system and color
- •Customer packaging and labeling
- •Product data sheets and inspection templates
- •Reserved drawing and project-document handling
Start the engineering review
Submit the valve data sheet, drawing and required document list.
We'll review your spec and tell you exactly what's in scope for engineering, ITP, and documents—before we quote.
| Table description | |||
|---|---|---|---|
| Process capability by stage, with the inspection and standards applied at each step. Used by procurement teams to scope project-level QA requirements. | |||
| Parameter | Value | Unit | Standard |
| Casting capability | Sand casting, investment casting, lost-wax; size up to 5 t single piece | 3 processes | ASTM A216 / A351 |
| Forging capability | Open-die forging up to 800 kg; ring-rolled forging up to 1500 kg | 2 processes | ASTM A105 / A182 |
| Machining capability | CNC turning, 5-axis machining, boring; tolerance ±0.05 mm | 3 processes | ISO 2768-m |
| Welding capability | SMAW, GTAW, GMAW, FCAW, PAW; WPS/PQR per ASME IX | 5 processes | ASME IX |
| Assembly & test | Bench assembly, hydrostatic 1.5× / pneumatic 1.1×, torque verification, low-emission | 5 stages | API 598 / ISO 5208 / FCI 70-2 |
| Surface treatment | Pickling, passivation, phosphating, epoxy, zinc, PTFE lining, hard-facing | 7 finishes | ISO 8503 / NACE MR0175 |
| Marking & traceability | MSS-SP-25 marking, heat number, melt trace, MTC 3.1 | 4 lines | EN 10204 3.1 |
| Quality system | Document control, CAPA, calibration, management review, internal audit | 5 pillars | ISO 9001:2015 |