Turn a drawing, a market requirement, or a new product concept into a production-ready industrial valve. Diefei combines engineering, precision casting, machining, coating, assembly, and testing under one manufacturing team.
Start with the model that matches how much design responsibility you want to keep. The production scope, tooling, intellectual property, and commercial terms are then defined in writing before work begins.
Built to your drawings, specifications, and operating requirements. We review manufacturability, then convert the approved design into a controlled production process.
Use a proven Diefei valve platform as the starting point. We adapt the design and production scope to your application, market, and customization brief.
Develop a new valve platform together. Joint engineering is suited to complex equipment programs where the final product must align with a broader system design.
Engineering, casting, machining, finishing, assembly, and dispatch sit inside one coordinated production system. That gives your project one accountable partner from first review to final packing.
Application review, drawing interpretation, material selection, and production feasibility.
Pattern and process selection matched to geometry, volume, and service conditions.
Controlled dimensions, sealing surfaces, and repeatable production fixtures.
Surface preparation and coating systems selected for the working environment.
Component verification, torque control, shell testing, and seat sealing checks.
Protected packing, documentation coordination, and export delivery support.
Each stage closes with a defined review or approval. This keeps the approved design, tooling, process, and quality plan aligned before production volume is committed.
Confirm application data, standards, drawing status, material requirements, and feasibility in a DFM review.
Iterate T1, T2, and T3 samples as required until the customer approves the reference sample.
Complete mold and fixture design, fabrication, and first-article verification against approved drawings.
Validate the production process, inspection method, and quality plan in a controlled small batch.
Manufacture, test, inspect, pack, and deliver under the approved production and quality controls.
Reference timelines, not a delivery promise. Actual timing depends on valve complexity, tooling, order volume, testing, material availability, and the approved project schedule.
Custom valve work depends on trust in the details. Drawings, BOMs, tooling, background IP, and change rights should be assigned before the first production release, not after a dispute.
Customer drawings and specifications remain customer property. Each party keeps its background IP. Joint or derivative IP, including process improvements and product modifications, must be allocated in writing.
Customer-funded molds and fixtures can be owned by the customer. Storage, maintenance, permitted use, insurance, and transfer rights should be defined in the tooling agreement.
Approved drawings govern manufacturing. BOM records identify critical materials and suppliers, with audit rights and document-control obligations agreed by both parties.
Any change to technical parameters, drawings, BOM, lead time, or price requires written confirmation. The cost and schedule impact is reviewed before a revised release is issued.
The quality plan is matched to the product, application, destination market, and contract requirements. Where a standard or certification scope is critical, Diefei provides the current supporting documents for review.
Valves receive shell-strength and seat-sealing tests before shipment, supported by the agreed inspection record.
Sampling levels can be specified in the contract. A reference plan is AQL 2.5 for major defects and AQL 4.0 for minor defects.
Manufacturing defects are Diefei's responsibility. Defects caused by customer design, specifications, or nominated materials are defined separately in the contract.
The proposed warranty period is 12 months after delivery for material and workmanship defects, subject to the final signed agreement.
Certification scope, certificate validity, and testing requirements vary by product and market. Current documents should be requested and verified for each project.
Share the working conditions and target outcome first. Our team will review the requirement, identify missing technical data, and recommend an OEM, ODM, or JDM route.
These are the first questions our engineering and sales teams usually discuss with a new OEM or ODM partner.
OEM uses your drawings, specifications, or operating requirements, with design rights retained by you. ODM uses a Diefei design platform and manufacturing, with customized results governed by the agreement. JDM is joint development, with ownership shared or allocated according to each party's contribution and the signed contract.
Provide the application, working medium, operating conditions, valve size and pressure class, material and connection requirements, relevant drawings or samples, target quantity, delivery schedule, and any standards or testing requirements. A Diefei engineer will review the package and confirm the open items.
MOQ depends on valve model, material, size, dedicated materials, tooling, and order quantity. Lead time depends on engineering complexity, sampling, tooling, production volume, testing, and material availability. Both are confirmed in the quotation and contract; the 12-day butterfly valve and 15-day check valve timelines shown on this page are reference examples only.
Customer-supplied drawings and customer-funded molds remain the customer's property unless the written agreement states otherwise. Diefei background intellectual property remains with Diefei. Joint or derivative intellectual property is allocated in the contract. Ownership, storage, maintenance, permitted use, and transfer rights should be documented before production begins.
Production follows the agreed inspection plan, with shell and seat tests before shipment. AQL levels, warranty terms, and remedies are confirmed in the contract; Diefei's standard proposal is a 12-month warranty for material and workmanship defects after delivery. Confidentiality covers drawings, BOMs, process data, and commercial information, with 3 to 5 years or the contract term as a recommended baseline, whichever is longer.
Send your application details and our OEM / ODM team will respond with the next technical steps.
