BEIJING DAYU HOLY VALVE CO., LTD

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            |      ENGLISH Home         |  Company         |   Products         |   Contact           Product Introduction   Butterfly Valve Check Valve Manual Operated Wedge Gate Valve Globe Valve Stainless Steel Ball Valve Ball Valve Strainer       Product Introduction Butterfly Valve Resilient-seated Expantion Wafer Type Butterfly Valve Summarize Employing the non-pinned stem/disc connection, has effectively reduced the internal leak-tightness of the metallic seal wafer type Butterfly Valve. Sealing automatical technology not only lower the operating torque, but also increace the products’ reliability, furthermore it is very convenience for maintaining. This type of products kept non-leaking record in more than 50,000 times operation under pressure, which is far beyond the normal butterfly level.
material of Parts

No

Names of parts

Material

1

Stem

SS

2

Retaining ring

65Mn

3

Thrust washer

SS

4

Bushing

Lubricating Bronze

5

O-ring

EPDM NBR

6

Bushing

Lubricating Bronze

7

Bushing

Lubricating Bronze

8

Disc

Plated Ductile Iron, Dutile Iron Nylon Coating, Stainless Steel, Aluminum Bronze, Polyether chloride Coating

9

Seat

NBR,EPDM,PTFE,CR

10

Body

HT200,QT450,WCB,P,R

  performance

Nominal Diameter DN mm(inch) (mm)

DN50-DN1000

Nominal Pressure PN Mpa (MPa)

1.0/1.6

Shell Testing (MPa)

1.5/2.4

Sealing Testing (MPa)

1.1/1.76

Working Temperature ( ℃ )

-30-135

Suitable Mediums

Water, sea water, oil, alkali, weak acid, salt, organic compound, and ect.

Standard Material

Body

HT200,QT450

Disc

PA11 Coating

Seat

EPDM,PTFE

Stem

45#

Seal ring

EPDM

Outside Coating

Epoxy Powder Coating

  Copyright©BEIJING DAYU HOLY VALVE CO., LTD
Address:No.128 Yong Wai Street Chongwen District Beijing   Postal Code:100075
Tel:010-67223388 Fax:86-10-67235888   E-mail:lzgdyhl@163.com Web:http://www.dyhl.com.cn
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