More than 20 years of OEM and ODM service experience.

Resilient Seated Butterfly Valve Wafer Type

Short Description:

Resilient seated butterfly valves,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

NPS 1.5”-24”  Mounted between flanges ANSI B16.1,ASME B16.5

Diameter 40mm – 600 mm between flanges EN1092 PN10,PN16,PN25

Design standard: API 609, BS EN 593, MSS SP-67.

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 Resilient seated Butterfly Valve wafer type Manufacturer & Supplier.


Product Detail

Product Tags

What is Resilient Seated Butterfly Valve Wafer Type?

Resilient Seated 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.

The movement of the disc will determine the position of the butterfly valve.The resilient seated butterfly valve wafer type can work as isolating valve if the disc rotates a full 90-degree turn, the valve is completely opened or closed.

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.

(CV/KV chart of resilient seated butterfly valve is available on request)

Resilient Seated Butterfly Valve Wafer type,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 resilient seated butterfly valve wafer type

Resilient seated butterfly valve lug type 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 resilient seated butterfly valves wafer type

  • 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.
  • Full bore body gives low resistance to flow.
  • No cavities in the flow passage,which makes it easy to clean and disinfect for potable water system etc.
  • Rubber lined internally in the body makes fluid not to contact the body.
  • Pinless disc design is helpful to prevent the leakage point on the disc.
  • 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.

Types of Operation for Resilient seated butterfly valves wafer type

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

Technical specification of resilient seated butterfly valves wafer type

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 resilient seated butterfly valves wafer type:

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

Valve body materials of resilient seated butterfly valves

Ductile iron
  • GGG40/50
  • GGG40.3(heat treated) 
  • ASTM A536 60-40-18
  • BS2789 400-18
  • General application
  • Heavy applications,Cold applications,petrochemical industries,power stations   
Stainless steel
  • ASTM A 351 CF8/CF8M
  • Duplex UB6/31803
  • Medicine,food,drink
Alu-bronze
  • ASTM B584 C95400
  • BS 1400 LG1
  • DIN 1705(RG10) 
  • Marine Service

Valve disc materials of resilient seated butterfly valve wafer type

Ductile iron nickel coated
  • GGG40/50
  • GGG40.3(heat treated) 
  • ASTM A536 60-40-18
  • BS2789 400-18
  • Air, non corrosive hot or cold water
Ductile iron nylon coated
  • GGG40/50
  • GGG40.3(heat treated) 
  • ASTM A536 60-40-18
  • BS2789 400-18
  • Potable water, water(max. 70°C, PH value between 4.5 and 9)
Ductile iron PTFE lined
  • GGG40/50
  • GGG40.3(heat treated) 
  • ASTM A536 60-40-18
  • BS2789 400-18
  • Acids,alkalis,oil,water,air
Stainless steel
  • ASTM A 351 CF8/CF8M
  • Potable water, demineralized water, solvents, industrial water
Duplex stainless steel
  • Duplex UB6/31803
  • Potable water, cooling water, sea water, demineralized water, solvents, foodstuff
Alu-bronze
  • ASTM B584 C95400
  • BS 1400 AB2
  • DIN 1714-CuAl10Ni
  • Sea water, potable water, gas
Hasterlloy-C
  • CW-12MW A494
  • Phosphoric, hypochloric, acetic, formic, sulfurous

Rubber sleeve liner of resilient seated butterfly valve wafer type

NBR 0°C~90°C Aliphatic hydrocarbons(fuels,low aromatic containing oils,gasses),sea water,compressed air,powders,granular,vacuum,gas supply
EPDM -20°C~110°C Water in general(hot-,cold-,sea-,ozone-,swimming-,industrial-, etc).Weak acids,weak salt solutions,alcohols,ketones,sour gasses,sugar juice
Sanitary EPDM -10°C~100°C Potable water, foodstuffs, unchlorined drinking water
EPDM-H -20°C~150°C HVAC, chilled water, food stuffs & sugar juice
Viton 0°C~200°C Many aliphatic, aromatic and halogen hydrocarbons, hot gasses, hot water, steam, inorganic acid, alkali

Product Application:

Where is the resilient seated butterfly valves wafer type used?

Resilient seated butterfly valve wafer type is widely used in

  • Water and waste effluent treatment plants
  • Paper, textiles and sugar industry
  • 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
  • Transportation and dry bulk handling
  • Power 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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