More than 20 years of OEM and ODM service experience.

Pneumatic Actuators Control Butterfly Valve API609 En593 China factory

Short Description:

NORTECH is one of the leading China API609 butterfly valve  Manufacturer & Supplier.

API609 butterfly valve,wafer type,lined with rubber sleeve.

Compact design and simple structure

Easy maintanance with replaceable parts

Centric shaft position,100% bi-directional bubble tightness

Pinless disc design to prevent the leakage from the disc

Function as isolation valve and flow regulating valve.

wide range of application and low cost.

Wafer type between flanges of various standard

Lever / worm gearbox operator / electric operator / pneumatic operator

Working Pressure: PN10/16/25,Class125/150


Product Detail

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What is API609 butterfly valve ?

API609 Butterfly  Valve ,is also referred to as “concentric”,"rubber lined" and “rubber seated” butterfly valve,has a rubber (or resilient) seat between the external diameter of the disc and the internal wall of the valve.

Butterfly valve is a quarter-turn valve that rotates 90 degrees to open or close the media flow. It has a circular disc, also known as the butterfly, found at the center of the body that functions as the closing mechanism of the valve. The disc is connected to an actuator or handle through the shaft, which goes through from the disc to the top of the valve body.

Butterfly valve is also used as flow regulalting valve,if the disc does not rotate to a full quarter-turn, it means the valve is partially open,we can regulate the flow of fluids by various openning angle.

API609 Butterfly  Valve  ,the most compact design with short face to's fit between two flanges,with studs passing from one flange through other. The valve is held in place and sealed with gasket by the tension of studs.A resilient seated butterfly valve wafer type is a lightweight, maintenance-free, cost-effective, and reliable solution to various applications.


Main Features of NORTECH API609 Butterfly Valve


  • Quality and service:more than 20 years of experiences of OEM/ODM services for leading european valve companies.
  • Quick delivery,ready for shipment 1-4 weeks,with considerate stock of resilient seated butterfly valves and components
  • Quality guarantee 12- 24 months for resilient seated butterfly valves
  • Quality control for each piece of butterfly valve

Main features of API609 Butterfly  Valve   

  • ISO 5211 top flange is convinient for easy automation and retrofitting of actuator.
  • Low operating torques results in easy operation and economical actuator selection.
  • PTFE lined bearings are designed for anti-friction and wear,no lubrication is required.
  • Inserted lining to the body, liner easy to replace,no corrosion between body and lining, suitable for end of line use.
    • Compact construction results in low weight, less space in storage and installation.
    • Centric shaft position,100% bi-directional bubble tightness,which makes installation acceptable at any direction.
resilient seated butterfly valve drawing 01

Precision splined shaft

design for diameter DN32-DN350


Moulded rubber sleeve


Hexagon Shaft design

for diameter DN400 and above


please refer to our catalogue of butterfly valves for details or contact our sales team directly.

Types of Operation for API609 Butterfly  Valve   


Handle lever 
  • Butterfly valve PN10/16,Class125/150 DN32-DN200
  • Butterfly valve PN25,DN32-DN150
Manual gearbox
  • full range from DN32-DN600
Pneumatic actautor
  • Pneumatic actuator double acting(DA)
  • Pneumatic actuator spring return(SR)
Electric actuator
  • On-off type electric actuator
  • Modulating actuator
  • Water proof
  • Explosion proof
Free stem ISO5211 mouting pad   
  • stem dimension and ISO flange customized on request of customer.        

Technical specification of API609 Butterfly Valve


Design and Manufacturer API609/EN593
Face to face ISO5752/EN558-1 series 20
Flange end ISO1092 PN6/PN10/PN16/PN25,ANSI B16.1/ANSI B 16.5 125/150
Pressure rating PN6/PN6/PN16/PN25,ANSI Class125/150
Test and Inspection API598/EN12266/ISO5208
Actuator mounting pad ISO5211

Main parts materials of API609 Butterfly  Valve   :

Parts Materials
Body Ductile iron,carbon steel,stainless steel,duplex stainless steel,Monel,Alu-bronze
Disc Ductile iron nickel coated,ductile iron nylon coated/Alu-bronze/stainless steel/duplex/Monel/Hasterlloy
Stem Stainless steel/Monel/Duplex
Bushing PTFE
Bolts Stainless steel

Product Application:

Where is theAPI609 Butterfly Valve used for ?

API609 Butterfly  Valve   is widely used in

  • Water and waste effluent treatment plants
  • Paper, textiles and sugar industry
  • Compressed air, gas and desulphurization plants
  • Brewing, distilling, and chemical process industry
  • Transportation and dry bulk handling
  • Power industry

The API609 Butterfly  valves are certified with WRAS in UK and ACS in France,specially for the waterworks.


Attestation de Conformité Sanitaire


Water Regulations Advisory Scheme


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