Make the first sample answer the right questions
A sample order should establish more than whether a block can be machined. It should resolve the part definition, identify the features that matter at acceptance and expose questions that would otherwise return in the next batch. The required output depends on whether you need to review a new design, qualify an existing manifold drawing or prepare for repeat production.
Establish the part definition
Confirm the drawing and model revision, exact material and condition, valve cavity references, finish, quantities and supply scope. Resolve conflicts between documents before manufacturing release.
Identify critical features
Highlight cavity diameters and depths, threads, sealing surfaces, mounting relationships and internal passages. Connect each required check to a suitable method and acceptance stage.
Agree the sample handover
Define the sample quantity, inspection records, customer review and any open questions. If the prototype uses a different material or finish, identify that difference and the limits of what it can establish.
Normal acceptance verifies the specified material and conformity to the manifold drawing. Pressure and functional testing are not routine checks for the machined block. Customer system validation and any separately agreed testing need their own scope.
Resolve manufacturability questions Agree feature inspection and its scopeRecord what was approved before releasing the next order
“The sample looks good” leaves room for different interpretations. Record which revision and sample were reviewed, the acceptance evidence, the feedback and any conditions still open. That gives engineering, purchasing and manufacturing the same basis for the next order.
Sample review
Compare the delivered sample and agreed records with the drawing. Capture customer feedback on the supplied features and any downstream assembly observations without treating those observations as a substitute for dimensional requirements.
Close the differences
Separate an accepted requirement from a proposed change or a concession limited to the sample. Update the controlled documents and agree any rework, replacement sample or additional checks needed.
Production release
Confirm the approved revision, material, finish, quantities, inspection and delivery requirements. A concession for one sample or batch does not automatically apply to future orders.
An approved physical sample can support comparison, but it does not replace the controlled drawing. Appearance references and inspection records should be linked to the same agreed part definition.
Link approval and records to the supplied partBuild consistency into the process and its checkpoints
Repeatability depends on the connection between the approved definition, the manufacturing route and the checks made as work proceeds. Zhongwei combines dedicated cavity tooling, workholding, tool-condition management and drawing-based inspection with the deburring and cleaning experience needed for complex manifold passages.
| Control area | What can drift | How the requirement carries forward |
|---|---|---|
| Drawing and material | An older drawing or a different supply condition can enter a repeat order. | Verify the released revision, exact grade and condition, together with the material evidence required for the order. |
| Setups and tooling | Tool wear or a changed setup can affect a feature even when the program name is unchanged. | Keep datum, workholding and tooling requirements connected to setup checks and the relevant in-process inspections. |
| Cavities and sealing features | A conforming sample does not establish that later diameters, threads and surfaces remain conforming. | Use the specified feature checks at the agreed stages. Sampling and report scope are defined for the project, not inferred from one approved part. |
| Finish and cleanliness | A different treatment route or later handling can alter the delivered condition. | Carry forward the approved finish, protected areas, deburring, cleaning and packaging requirements; review changes before use. |
| Batch identity and release | Parts, records or revisions can become disconnected during processing and delivery. | Maintain the agreed identification and record links, and resolve nonconforming or uncertain status before shipment. |
Check the features that can change
A first-part check confirms the applicable setup results. In-process checks address the relevant features as production continues; final checks address the specified delivery condition. Agree the methods and scope for the component rather than assuming the same inspection plan suits every order.
Keep the tooling connected to the requirement
The tooling-storage photograph at the top of this page illustrates a real workshop resource. The production plan must still connect the selected tools and their condition to the actual cavity geometry and acceptance requirements.
Make changes visible before they affect the next batch
A material substitution, revised port, changed finish or new cavity reference can affect more than the edited line on a drawing. Review the consequences for tooling, machining, inspection, cleaning and schedule. Changes to customer-approved requirements need approval before implementation.
Identify the change
State what differs from the released requirement, why it is proposed and which orders or parts it affects. Resolve the status of material and work already in progress.
Agree the checks
Determine whether the change needs document review, selected feature inspection or new samples. The extent depends on the change and the customer’s acceptance requirements.
Define the cutover
Record the approval and the revision or batch at which the change takes effect. Keep any old and new versions clearly identified when both remain in the delivery plan.
Routine tool replacement is not the same as a design change. It still needs the applicable setup and feature checks; customer notification or requalification follows the agreed change-control requirements.
Carry finish requirements through supplier processingReview an existing manifold against its current requirements
For an existing manifold project, start with the current drawing, known critical features and authorized reference samples. Zhongwei reviews the manufacturing and acceptance requirements with the customer, including any changes or known issues that the next order needs to address.
Bring the known requirements
Share the current drawing and model, material and finish, cavity references, inspection criteria and relevant problem history. Include only reference parts and information you are authorized to provide.
Resolve undocumented details
If a reference sample and drawing differ, identify the discrepancy for approval. A sample alone does not establish original tolerances, exact material condition or all hidden passage requirements.
Agree sample acceptance
Define which dimensions, interfaces, appearance characteristics and records will be compared. Agree any customer assembly review, sample feedback and production-release conditions before the trial order.
Existing production history provides useful context. Acceptance of the supplied parts remains tied to the current approved requirements and the evidence agreed for the order.
Confirm the valve and port referencesPlan lead time around the actual release conditions
We confirm lead time for the project and current production plan. Material availability, dedicated tool preparation, part complexity, surface treatment, inspection scope and order quantity all affect the schedule. A forecast helps planning, but it is not the same as a released order or a reserved production slot.
Before the schedule is confirmed
Provide sample and repeat-order quantities, required delivery date, drawing readiness and any sample approval or documentation requirements. Identify long-lead or customer-specified materials and processes.
Between sample and batch
Allow for customer review, any approved changes and the checks needed before release. If a decision or revised input changes the plan, confirm its impact on the next milestone.
At delivery and reorder
Agree shipment quantities, identification, packaging and records. For a repeat order after a gap, reconfirm the revision, requirements and current material or tooling readiness before fixing the schedule.
We do not publish a fixed sample lead time, minimum order quantity or monthly capacity that applies to every manifold. Confirm feasibility and timing against the actual part and order. Material certificates and dimensional reports can be provided; first-article, CMM and other report coverage are agreed by project.
Questions about samples, existing projects and repeat orders
Can you support prototypes and small batches as well as repeat orders?
Yes. Discuss the part, project stage and quantities so material, tooling, inspection and scheduling can be planned together. Order feasibility and commercial terms depend on the actual manifold.
Does approval of one sample guarantee the next batch?
Sample approval establishes an agreed reference and release basis. Later parts still require the applicable process controls and inspections; the approved sample is not evidence that every future part has already been checked.
Can we approve a prototype made in a different material or finish?
Record exactly what that prototype is intended to demonstrate and which requirements remain unverified. A different material or finish may change machining, dimensions or suitability, so the production condition needs its own agreed review.
Do repeat orders automatically include a full first-article report?
No. Confirm the report and inspection scope for the order, including any requirement after a revision, process change or production gap. Material and dimensional records can be provided as agreed.
What happens if the drawing changes after samples are made?
Identify the affected features and any work already in progress, review the manufacturing and inspection impact, and agree the revised release basis. Additional checks or samples depend on the change and the customer’s approval requirements.
Can an existing sample support a manifold project review?
It can support review alongside the approved documentation. If drawings or requirements are incomplete, the missing material, tolerance, internal geometry and acceptance information must be resolved before production release.
Can you quote a repeat order using the previous price and lead time?
The previous order is a useful reference, but quantity, revision, material availability, processing needs and current scheduling must be reconfirmed. Identify the previous part and the requested delivery plan when enquiring.
Tell us which stage your manifold project has reached
State whether this is a new design, a sample review, an existing-part review or a repeat order. Send the current revision, material and condition, finish, sample and production quantities, critical acceptance requirements and requested delivery date. For an existing part, include the known issue or change that matters most.
Complete manifold drawings are preferred; a schematic can start the discussion. Send DWG, DXF, PDF or JPG drawings and STEP, X_T, IGS or SLDPRT models by email or WhatsApp. Identify any documents still awaiting approval.
Prepare your manifold enquiry