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CONCENTRIC BUTTERFLY VALVE
resilient rubber seat
wafer type,lug type and flange type
handle lever and manual gearbox operation.
1.API609,BS5155
2.PN10/16,CLASS125/150
3.WAFER TYPE AND DOUBLE FLANGE TYPE
4.SUITABLE FOR VARIOUS FLANGE

Face to face:
1)wafer type:EN558-1 basic series 20(wafer short)
2)double flange type:EN558-1 basi series 13(double flange short)

DN40-DN600
1)full wafer type
2)Semi-lug type with alignment holes
3)Fully lug type
DN50-DN1200
4)wafer type with inserted seat,U type flange end
5)double flange type with bonded seat.

ESB20 butterfly valve design is based on the principle of high efficiency

1.Compact construction results in low weight,less space in storage and installation.

2.Centric shaft position, 100% bi-directionalbubble tight shut off make installation acceptable at any direction.

3.Full bore body give low resistance to flow.

4.No cavities in the flow passage, easy to clean and disinfect for potable water system etc.

5.Rubber lined internally in the body makesfluid not to contact the body.

6.ISO 5211 top flange for easy automation andretrofitting of actuator.

7.Low operating torques results in easyoperation and economical actuator selection.

8.PTFE lined bearing at both shaft friction andwear, no lubrication required.

9.   Lining Bonded to the body ensure nocorrosion between body and lining, longer life, suitable for vacuum service,eg. at the suction side of the pump, suitable for end of live use.

Inserted lining tothe body, liner easy to replace, no corrosion between body and lining, suitablefor end of line use.

ES-B20butterfly valves are for installation in flanged piping systems. They are easyto install or to remove from the pipeline, being bolted between the mating pipeflanges. A selection can be made from different body types, eg. wafer, flanged.The correct body type of the valve should be selected on the basis ofinstallation requirements

Body Materials

Ductile iron

GGG40, DIN 1693

60-40-18,ASTM A536

400-18, BS 2789

General application

Ductile iron(Heat treated)

GGG40.3 DIN 1693

Heavy applications, Cold applications, petrochemical industries, power stations, alternative for cast steel

Disc materials

Type of material

Material standard

Example for application

Ductile iron nickel plated

GGG40, DIN 1693

60-40-18,ASTM A536

400-18, BS 2789

Air, non corrosive hot or cold water

Ductile iron, 340μm nylon coated

GGG40, DIN 1693

60-40-18,ASTM A536

400-18, BS 2789

Potable water, water(max. 70℃, PH valve between 4.5 and 9)

Cast stainless steel

CF8M, ASTM A351

Potable water, demineralized water, solvents, industrial water, not recommended for sea water, gas

Aluminum bronze

G-CuAl10Ni, DIN 1714

C99500, ASTM B148

AB2, BS 1400

Sea water, potable water, gas

Hastelloy-C

A494, CW-12MW

Phosphoric, hypochloric, acetic, formic, sulfurous


Seat/body lining materials

Type of material

Material standard

Temperature range

Example for application

Nitrile rubber

NBR

0℃~90℃

Aliphatic hydrocarbons(fuels, low aromatic containing oils, gasses), sea water, compressed air, powders, granular, vacuum, gas supply

Ethylene-propylene rubber

EPDM

-20℃~110℃

Water in general (hot-, cold-, sea-, ozone-, swimming-, industrial-, etc). Weak acids, weak salt solutions, alcohols, ketones, sour gasses, sugar juice

Viton

Viton

0℃~200℃

Many aliphatic, aromatic and halogen hydrocarbons, hot gasses, hot water, steam, inorganic acid, alkali

PTFE

PTFE

10℃~155℃

Fit for acids, alkalis, oil, not fit for low temperature

Shaft materials

Type of material

Material standard

In combination with disc material

Stainless steel

SS410

Stainless steel, ductile iron

High strength stainless steel

1Cr17Ni2

ASTM A431

Stainless steel, ductile iron

Stainless steel

SS316

Stainless steel, ductile iron, aluminum bronze

NOTE:For use in fluids containing ammonia, all valve parts made from non coppercontaining materials.





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