Home Our valves Full rubber lined Double flanged ISO series

Double flanged ISO series



Type WVFL-F16     Type WVFL-F4


The World-Valve Iso-series concentric double flanged butterfly valves have a fully vulkanized liner for on/off and control services for liquids and gasses in general services, in the power industry, marine industry, chemical and petro chemical industry, on-/ofshore applications, ….               



  • Standardized actuation flange
  • Centric shaft position
  • Shaft in PTFE lines bearings
  • Lining bonded to the body
  • No fluid contact with body
  • Streamlined disc shape
  • No flange gaskets required
  • No cavities in the flow passage
  • Low operating torques
  • High reliability by bonded lining
  • Excellent sealing properties
  • No lining movement when cycling
  • No internal body corrosion
  • Suitable for vacuum conditions
  • Easy installation
Standard according to:                 ISO - DIN – BS –API*
Flange connection:                      DIN-PN 6/10/16, ANSI Class 125/150, JIS 5/10/16K*
Dimensions:                                 50 - 2.000mm*
Face to Face dimensions:           DIN 3202 F16/F4 (ISO Series 13/14) (BS Short/Long)
Maximum working pressure*:     16 bar
Temperature range*:                   -30°C ÷ 200°C
Body materials:                            GGG40/ Al. Bronze/ AISI 316/ GSC-25/Duplex/Other*
Disc materials:                             Al. Bronze/ AISI 316/ Duplex/ Hastelloy/Other*
Liner:                                            BUNA-N/ EPDM/ Viton/ Hypalon/ Vulkolan/ Other*

*Details on specification can be found in the PDF documentation, other requirements can be offered on request.



International standards

Lining vulcanised to the valve body face to face dimensions according international standards

WVFL-F4 Double flanged type pdf
WVFL-F16 Double flanged type pdf


Technical information

Installation and maintenance instruction

INSTALLATION Installation and maintenance instruction pdf
INSTRUCTIONS KV and CV values double ecentric pdf