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High Quality Wholesale IndustrialRubber seat butterfly valve China factory supplier Manufacturer

Short Description:

Rubber seat butterfly valve,wafer type,lined with rubber sleeve.

Centric shaft position,100% bi-directional bubble tightness

Pinless disc design to prevent the leakage from the disc

Compact design and simple structure

Easy maintanance with replaceable parts

Function as isolation valve and flow regulating valve.

wide range of application and low cost.

Wafer type between flanges of various standard

Face-to-Face dimension: API 609, ISO 5752, BS EN 558, BS 5155, MS SP-67.

Lever / worm gearbox operator / electric operator / pneumatic operator

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

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


Product Detail

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What is Rubber seat butterfly valve ?

Rubber seat 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.

Rubber seat butterfly valve ,the most compact design with short face to face.it'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 Rubber seat butterfly valve

Wafer Butterfly Valve design features of pinless disc

WHY TO CHOOSE US?

  • 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 Wafer Butterfly Valve  

  • Compact construction results in low weight, less space in storage and installation.
  • 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.
resilient seated butterfly valve drawing 01
splined-shaft

Precision splined shaft

design for diameter DN32-DN350

resilient-seated-butterfly-valve-drawing-02
resilient-seated-butterfly-valve-drawing-03
rubber-sleeve-seat-design

Moulded rubber sleeve

hexagon-shaft

Hexagon Shaft design

for diameter DN400 and above

resilient-seated-butterfly-valve-drawing-04

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

lever
manual-gear
pneumatic-actuator
electric-actuator
free-stem

Technical specification of Rubber seat butterfly valve

Standards:

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 Wafer 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
Liner EPDM/NBR/FPM/PTFE/Hypalon
Stem Stainless steel/Monel/Duplex
Bushing PTFE
Bolts Stainless steel

 

Product Application: Rubber seat butterfly valve

Where is the resilient seated butterfly valves wafer type used?

Rubber seat butterfly valve is widely used in

  • Construction industry, and drilling production
  • Heating, air conditioning, and cooling water circulation
  • Pneumatic conveyors, and vacuum applications
  • Compressed air, gas and desulphurization plants
  • Brewing, distilling, and chemical process industry

The resilient seated butterfly valves are certified with WRAS in UK and ACS in France,specially for the waterworks.

ACS
wras

Attestation de Conformité Sanitaire

(ACS)

Water Regulations Advisory Scheme

(WRAS)


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