01Requirement review
Application, valve schedule and service scope.
Our services
Valve service beyond the product. Supported from packing to operation.
Diefei supports valve projects through protected packaging, traceable documentation, installation and commissioning, maintenance, renovation and replacement support. Each service scope is defined around the project requirements and confirmed before work begins.
Nationwide service network ISO 9001 / 14001 / 45001 Lifetime technical support
Valve lifecycle supportFrom order to operation
02Packaging
Protection, modular access and shipment planning.
03Documentation
Inspection, product and export records.
04Commissioning
On-site installation and commissioning support.
05Lifecycle care
Maintenance, renovation and replacement.
1972Manufacturing since
3ISO management systems
7×24Technical consultation
LifetimeTechnical O&M support
Service coverage
One service partner.
Across the whole valve lifecycle.
Diefei's documented service scope extends beyond valve supply. It covers project documentation, packaging coordination, installation and commissioning, repair and maintenance, sealing service, energy-consumption inspection, old valve-group renovation and imported-valve replacement.
Project review and traceable records
Support the valve schedule with specification sheets, BOM information, dimensional inspection records, test reports and other project documents where applicable.
Protection before the valve reaches site
Modular packaging can be arranged around visual access, easy removal and production-line delivery, with a documented packaging, handling and storage standard for new parts.
On-site installation and commissioning
Field service supports the installation and commissioning of Diefei main products, with the exact attendance scope, schedule and site responsibilities agreed for the project.
Repair, maintenance and sealing care
Service covers valve repair, maintenance, inspection, refurbishment, trade-in programs and dedicated sealing maintenance for applicable valve types.
Annual inspection and valve renovation
Annual energy-consumption inspection supports operating review, while old valve-group renovation can address outdated assemblies, service access and upgrade requirements.
Imported-valve replacement and lifecycle advice
Replacement and maintenance support is available for selected imported brands, backed by continuing technical operation and maintenance support through the product lifecycle.
Modular packaging logic
Packaging can be organized for visibility, controlled access and delivery to a production line.
Nationwide service reach
A nationwide service network supports installation, maintenance and replacement work in the field.
Long-term technical support
Diefei provides lifetime technical operation and maintenance support for its main products.
Packaging & protection
Protection is designed around
the valve, route and site.
Diefei can arrange modular packaging for visibility, controlled access and production-line delivery. Detailed packing protection, box construction and loading limits should be aligned with the valve size, transport mode and project requirements.
Modular packaging with line-side access
Packaging can be organized around visual inspection, easy removal and delivery to a production line. For new components, a Packaging, Handling and Storage Standard can be submitted as part of the agreed documentation.
- Visible and easy-to-access arrangement
- Modular tooling for quality protection
- Delivery aligned with production-line rhythm
Case selection by valve size
As a planning reference, valves below DN100 are commonly supplied in corrugated cartons or wooden cases, while DN100 and larger valves commonly use wooden cases with steel strapping and corner protection.
DN < 100DN ≥ 100Wood-frame option
Moisture, corrosion and surface protection
Export packing can include moisture-barrier paper or desiccant, rust-preventive oil on exposed machined surfaces, flange-face protection caps and closed valve discs. Solid-wood export packing should follow ISPM 15 and carry the IPPC mark.
ISPM 15 / IPPCGB/T 7284GB/T 7350
Securing and load stability
Reference practice uses pressure bars, blocks, braces, strapping and cushioning to prevent movement. Mixed cases should keep valves separated, and package fill is commonly planned at no less than 90%.
Fill ≥ 90%Mixed case ≤ 950 kgCushioned contact points
Reference boundary: packaging materials, weight limits, marking language, wood treatment and loading arrangement are project-specific. The approved drawing, packing specification and contract take precedence over the general figures shown on this page.
Documentation & shipment identity
Every shipment should carry
the records the project needs.
Diefei's product and export documentation can support inspection, installation, traceability and customs clearance. The exact document pack is confirmed against the valve scope, destination and commercial terms.
01
Product and quality documents
Supplied where applicable to the ordered valve and agreed scope.
- Certificate of conformityProduct release document
- Operating and maintenance manualInstallation and care
- Quality assurance certificateQuality record
- Packing listShipment content
- Specification / datasheetOrdered configuration
- Module and material BOMComponent reference
- Full-dimensional inspection reportDimensional record
- RoHS and factory test reportsCompliance and release
02
Export documents
Coordinated with the agreed Incoterms, destination and freight arrangement.
- Commercial invoiceCommercial record
- Packing listCartons, cases and weights
- Certificate of originOrigin evidence
- Quality inspection certificateInspection evidence
- Wood packaging declarationISPM 15 / IPPC status
- Cargo weighing recordShipment verification
Final document requirements should be confirmed before shipment, especially where customs, certification or customer inspection requirements apply.
Shipment control
Packing list, marks and serial identity should agree.
Reference controls help the receiver match the physical shipment to the order, inspection records and warranty history.
Packing list
Sealed, placed securely in the case and aligned with the actual quantity and description.
Marks
Product, model, net and gross weight, volume, origin, destination and handling symbols.
Serial traceability
Nameplate, certificate and factory date should remain consistent for later identification.
Loading reference: common planning figures include a 20' GP volume of about 33 m³, a 40' GP volume of about 67 m³ and a payload range of about 20–28 t. Container humidity is commonly controlled at 30%–70%. Actual capacity depends on case dimensions, weight distribution, route and carrier approval.
Warranty framework
Clear warranty scope.
No assumptions left open.
Diefei's documented foundation includes ISO-based management systems, pressure and sealing tests, national type testing and lifetime technical operation and maintenance support. Warranty duration and start date must still be confirmed in the formal contract or product warranty card.
Documented quality foundation
ISO 9001, ISO 14001 and ISO 45001 systems cover design, production, sales and after-sales service. Main products receive shell and sealing tests and national type-test validation.
Company-specificReference warranty periods
Common industry structures include 12 months from factory release, or 18 months from factory release and 12 months from commissioning, whichever comes first. Wear parts are commonly referenced at 6 months.
Industry referenceTypical covered components
Reference scope may include body or actuator material defects, weld cracks, machining non-conformance, internal sealing failure, abnormal wear and original-component quality faults.
Industry referenceTypical exclusions
Reference exclusions include human damage, operation outside the rating, force majeure, unauthorized dismantling or modification, normal wear, medium corrosion outside the material limit and failure to follow installation or maintenance instructions.
Industry referenceContract takes precedence: the applicable warranty period, start trigger, covered parts, exclusions, inspection method and remedy are those stated in the signed contract or product warranty card. The reference periods on this page are not an automatic, unconditional commitment.
After-sales support
Support that continues
after commissioning.
A nationwide service network and project-based field support connect installation, maintenance, sealing care, performance inspection, renovation and replacement into one service path.
Installation & commissioning
On-site installation and commissioning support for Diefei main products, with attendance scope and site responsibilities agreed for the project.
Repair & maintenance
Valve repair, maintenance, inspection, refurbishment and trade-in programs for applicable products and service conditions.
Sealing maintenance
Dedicated sealing maintenance supports leakage control and sealing-system care for applicable valve types.
Annual energy inspection
Annual energy-consumption inspection helps review operating performance and identify service or renovation priorities.
Valve-group renovation
Old valve groups can be renovated or upgraded to address reliability, access, performance or compatibility requirements.
Imported-valve replacement
Replacement and maintenance support is offered for selected imported brands, including Bray, DEMCO, WECO and RITE equipment.
7×24 technical consultation
Technical consultation is available around the clock to help define the next inspection, maintenance or replacement step.
Lifetime technical O&M
Lifetime technical operation and maintenance support is provided for Diefei main products as part of the documented service scope.
Company-stated benchmark
Service speed designed to reduce imported-brand downtime.
Diefei's supplied company material states that after-sales response is 80% faster than that of imported brands. Project-specific response performance should be confirmed with the service team and written into the applicable agreement where required.
Industry reference timeline
Reference service windows
for project planning.
The following values are included as general industry references for maintenance planning. They should not be read as automatic service-level commitments. Confirm the applicable response and repair window with Diefei for the project, location and spare-parts scope.
Technical acknowledgement
Initial telephone or technical response and a proposed troubleshooting path.
Local or other regions
Reference attendance within 24 hours in local or core areas and 48 hours in other areas; remote regions may require more time.
Service turnaround
Typical repair references are 3–5 working days for routine work and 7–10 working days for complex work. A replacement reference may be 72 hours.
Common spare parts
Common spare parts are commonly referenced at 24–48 hours, custom parts at about 15 working days, with parts and repair support for at least 15 years.
Planning note: distance, site access, fault diagnosis, spare-parts availability, customs, weather and shutdown windows can affect the actual schedule. The signed service agreement or order confirmation should define any binding response commitment.
Scope confirmation
Know what is documented.
Confirm what is contractual.
A clear service page separates proven company capability from general industry practice. This distinction protects both technical evaluation and commercial planning.
01
Supported in Diefei material
Company-specific capability
- Manufacturing since 1972
- ISO 9001, ISO 14001 and ISO 45001 management systems
- Shell and sealing tests plus national type-test validation
- Modular packaging and new-part packaging, handling and storage standards
- Nationwide service network and on-site installation and commissioning
- Repair, sealing maintenance, energy inspection and valve-group renovation
- Replacement support for selected imported valve brands
- 7×24 technical consultation and lifetime technical O&M support
02
Confirm before approval
Project and contract terms
- Final packing drawing, material and protection method
- Case dimensions, weights, stacking and lifting points
- Shipping route, carrier limits, insurance and Incoterms
- Warranty duration, start trigger, coverage and exclusions
- Technical response, site attendance and repair windows
- Spare-parts list, recommended stock and supply period
- Site responsibilities, access, utilities and safety rules
- Required certificates, inspection records and document language
Valve service FAQ
Questions before you
set the service scope.
Use these answers to prepare a clearer service request. Final packaging, warranty and response terms should be confirmed against the signed contract or product warranty card.
Does Diefei provide installation and commissioning support?
Yes. Diefei provides on-site installation and commissioning support for its main products through its nationwide service network. The attendance schedule, site responsibilities and scope should be agreed for each project.
Which documents can be supplied with a Diefei valve order?
Subject to the order and agreed scope, documents can include a certificate of conformity, operating and maintenance manual, quality assurance certificate, packing list, specification or datasheet, BOM, dimensional inspection report, RoHS report and factory test report. Export orders may also include a commercial invoice, certificate of origin, quality inspection certificate, wood packaging declaration and weighing record.
Are the warranty and response times on this page guaranteed?
No. Warranty periods, start dates, covered parts, exclusions, response windows and repair times marked as industry reference are planning guidance only. The terms in the signed contract or product warranty card are the controlling commitment for each order.
Can Diefei replace or service imported valves?
Diefei's documented service scope includes replacement and maintenance support for selected imported valves, including Bray, DEMCO, WECO and RITE products. Dimensional checks, materials, actuator compatibility and service access should be reviewed before replacement is approved.
How should packaging and shipping requirements be confirmed?
Confirm the valve size and weight, packing method, protection needs, marking language, destination, transport mode and carrier limits before shipment. Diefei can then align the packing specification and documents with the approved project and commercial terms.
Start a valve service review
Send us the product, scope and site.
Share the valve model, quantity, destination, installation plan, service need and required documents so the team can define the next step.
