Industrial Valve Manufacturer for Oil, Gas & Water Projects
API 6D and CE certified ball, gate and butterfly valves. Factory-direct pricing, 100% pressure tested, OEM branding available.
Valve Products
Browse DemoFlow ball, gate and butterfly valves with full specifications, MOQ and lead time.
Ball Valves
Floating and trunnion-mounted ball valves from 1/2" to 24", Class 150 to 900, for oil, gas and water service.
2 models →Gate Valves
Cast steel and ductile iron gate valves for pipelines, waterworks and industrial isolation service.
1 model →Butterfly Valves
Wafer, lug and double-flanged butterfly valves for water, HVAC and low-pressure process lines.
1 model →Why Buyers Choose DemoFlow
100% Pressure Tested
Every valve passes shell and seat tests to API 598 before packing. Test reports ship with each order.
Samples in 7 Days
Standard models ship as samples within 7 days, so you can validate fit and quality before a bulk order.
OEM & Private Label
Your logo cast on the body, custom colours, nameplates and export cartons from 10 pcs per model.
Engineer-Led Support
Talk directly to a valve engineer about media, pressure class and materials, not just a sales rep.
Factory, Production & Quality Control
Our 32,000 m² plant covers machining, assembly, painting and testing under one roof, so we control quality and lead time end to end.
- CNC machining centres for bodies, balls and stems
- In-house hydrostatic and pneumatic test benches up to 6,000 psi
- Spectrometer material checks on every casting batch
- Third-party inspection welcome (SGS, BV, TÜV)
How We Work With You
- RequirementSend media, size, pressure class and quantity.
- QuotationEngineer-checked quote within 24 hours.
- SampleStandard samples in 7 days.
- Production25–35 days with photo updates.
- InspectionPressure test reports and third-party QC.
- ShippingFOB Ningbo / Shanghai or CIF to your port.
Certified for Global Projects
Our quality system and products are certified for oil & gas, potable water and EU pressure equipment markets.
- ISO 9001:2015
- API 6D
- CE (PED 2014/68/EU)
- WRAS
What Our Customers Say
“Consistent quality across four years of orders. Their test reports make our customs and client approvals easy.”
“The engineer helped us switch seat material for a hot-water line and saved a costly field failure.”
Frequently Asked Questions
What is your minimum order quantity (MOQ)?
10 pcs per model for standard valves. OEM branding starts from 50 pcs per model.
Can I get samples before placing a bulk order?
Yes. Standard models ship as samples within 7 days. Sample cost is refunded on your first bulk order.
What is your production lead time?
25–35 days after drawing and deposit confirmation, depending on size and quantity.
Which certifications do your valves have?
ISO 9001:2015 quality system, API 6D, CE (PED 2014/68/EU) and WRAS for potable water models.
What payment and trade terms do you accept?
T/T (30% deposit, 70% before shipment) or L/C at sight. FOB, CIF and DDP terms are available.
Tell Us What You Need
Share size, pressure class, media and quantity. A valve engineer replies within 24 hours.
- ✉ sales-web@demoflow-valves.example
- ☎ +86 577 0000 0000
- ⌂ No. 88 Valve Industrial Park, Longwan District, Wenzhou, Zhejiang, China