Eccentric/Tripple Offset Flanged Butterfly Valve

Product Model:PD4P1YP-16 Product Structure: Eccentric Product grade: PN1.6~4.0MPa Product material: WCB/304/316 Product Specifications: DN50~1200
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Product Details

Eccentric/Tripple offset flanged butterfly valve


Spcificaions

Product Model:PD4P1YP-16

Product Structure: Eccentric

Product grade: PN1.6~4.0MPa

Product material: WCB/304/316

Product Specifications: DN50~1200


Design Standard: GB/T12238-1989

Flange connection size: GB/T9113.1-2000; GB/T9113.2-2000; GB/T9115.1-2000; GB/T9115.2-2000

Structure length: GB/T12221-1989

Pressure test: GB/T13927-1992; JB/T9092-1999


Main technical parameters


Nominal diameter

DN(mm)

50~2000

50~500

Nominal pressure

PN(MPa)

0.6

1.0

1.6

2.5

4.0

Test Pressure

Strength Test

0.9

1.5

2.4

3.75

6.0

Seat Test

0.66

1.1

1.76

2.75

4.4

gas seal test

0.6

0.6

0.6

0.6

0.6

Apply Temp.

Carbon steel:-29℃~425℃  Stainless Steel-40℃~600℃

Apply Medium

Air, water, steam, gas, oil, and acids, alkalis, and salts with weak corrosive media, etc.

Actuator

Worm gear , air , electric


Main parts material


Part Name


Material

Body

Cast iron, cast steel, stainless steel, chromium molybdenum steel, alloy steel

Disc

Cast steel, alloy steel (hard chromium plating), stainless steel, chromium molybdenum steel

Seal Ring

Stainless steel, polylactone, anti-wear materials

Stem

2Cr13, 1Cr13 stainless steel, chromium molybdenum steel

Packing

Graphite

Valve Eccentricity and Principle

1, deviation from the center of the pipeline

2, deviate from the center of the sealing surface

3, inclined cone

When the valve is opened, the butterfly plate and the valve seat are in momentary contact when they are closed, and the eccentricity of the disc 1 and the eccentricity 2 are quickly released from the valve seat, which reduces the wear of the sealing pair, and the friction torque is small, and the opening is flexible. The eccentric cone surface 3 enables the butterfly plate to pass through the inner hole of the valve seat when the valve is opened or closed to achieve contact sealing. In addition, the radius of rotation of the conical disc is greater than the radius of rotation of the seal contact position, so that the disc will close tighter when the valve is closed, enabling self-locking and preventing the disc from over-positioning.




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