Welcome to Alliance Industry Limited ! 


YDF VALVES is comitted to provide high quality industrial valves, creating competitve advantage for our customers. As one of the leading valve manufactures in China, YDF specializes in the development of innovative design, through intensive R&D programs and a commitment to be a good parter of flow control system.

YDF’s main product lines include Ball, Gate, Globe, Check, Butterfly and Power Station valves, size range of 1/2 inch up to 60 inch , pressure rating of 150LB~2500LB , capable material for carbon steel, stainless steel, duplex stainless steel, alloy steel etc., design temperature of -196~ 650 Deg. C, designed in accordance to standard of ASME, ASTM, ANSI, API, GB, BS, JIS and DIN Standard. YDF Valves have been widely used throughout the world in Oil, Gas, Chemical, Refining, Power Generation, Marine, Pipeline Transmission industrial and LNG application. YDF has been certified with ISO9001, ISO14001, OHSAS18001, CE/PED, ATEX, TA Luft/ISO15848-1 low emission, ABS, BV, DNV, CCS, SIL 3,CU-TR ,TS and CNAS(ISO 17025) for approvals.

  • ​3D molding and finite element analysis - Solid Works & Ansys
  • ​Drawing Sketch – AutoCAD software
  • ​BOMs & Material become real time – Through the ERP System
  • ​Casting Simulation molding &Pouring– Huazhu
Company Qualification

YDF's quality assurance is dedicated to supply zero defect valves to customers with reliable service life. Through YDF's quality compliance, they have achieved the following certifications: ISO9001, ISO14001, OHSAS18001, CE/PED, ATEX, TA Luft/ISO15848-1, ABS, BV, DNV, CCS, SIL 3,CU-TR ,TS and CNAS(ISO 17025).

Special Qualification

  • ​WPS&PQR&WPQ certified by TUV (ASME IX and CE/PED)
  • ​NDE (RT,MT,PT,UT), Level 2&3 ASNT, Level 1&2 EN475& ISO9712
  • ​NACE certified QC for Coating & Painting
Certificate Accreditation

  • ​ISO 9001
  • ​ISO 14001,OHSAS18000
  • ​API 6D
  • ​​CE/PED
  • ​ATEX
  • ​API 607&6FA fire safe
  • ​​​API 624
  • ​TA Luft/ISO 15848-1
  • ​API600
  • ​API 591
  • ​ABS
  • ​BV

End User Approval

Floating Ball Valves

Design Feature: 

Soft Seated / Metal to Metal / Fire Safe Tested / Cavity Pressure Relief / Cryogenic / Anti blow proof Stem / Low Emission / Anti-Static

Trunnion Mounted Ball



Double Piston / Single Piston / DBB / Soft Seated / Metal to Metal / Anti Blow proof stem / Anti-Static / Cryogenic / Fire Safe Tested / Cavity pressure Relief / Emergency Sealant injection

GGC Valves

Main Series: 

API 600 Casting / API 602 Forging

API 603 S.S. & Alloy / Power Station

Dual Plate Check

Aaxial Flow Check Valve

API6D Pipeline Valves

Main Series:

API 6D Through Conduit Gate Valve

API 6D Fully Welded Ball

API 6D Full Opening Swing Check

Main Product Series

Butterfly Valves

Main Series:

Concentric / Double Offset / Triple Offset

Actuator Valves

Main Actuator Brand:

Rotork / Limitorqe / Auma / Biffi / Bettis / HKC / Flowbus