Lined Butterfly Valve

Lined Butterfly Valve

Extensive field research and engineering have developed this state-of-the-art design which provides excellent shutoff protection (bubble-tight shutoff) and high Cv values. The resilient seated butterfly valve is crafted in a variety of materials such as PTFE, PFA, Stainless Steel, UHMWPE and special alloys to fit a wide range of customer requirements. As with all products, precision manufacturing and exceptional quality remain the keys to a proven record of long service life.

Product Details

                 Lined Butterfly Valve                   



Specifications

· Size Range:2" - 24" (50mm - 600mm)

· Body Style:Wafer, Lug

· Temperature Range:0°F to 392°F (-18°C to 200°C)

· Pressure Ratings:Bidirectional Bubble-tight Shutoff: to 150 psi (10.3 Bar)
Body (CWP): 150 psi (10.3 Bar)

· Body Materials:Ductile Iron, Carbon Steel, Stainless Steel

· Disc/Stem Materials:Stainless Steel, PTFE/SS, PFA/SS, UHMWPE/SS, UHMWPE/DI, Titanium

· Seat Materials:PTFE, Conductive PTFE, UHMWPE

· Applications:Highly Corrosive, Toxic Media

Lined Butterfly Valve

Extensive field research and engineering have developed this state-of-the-art design which provides excellent shutoff protection (bubble-tight shutoff) and high Cv values. The resilient seated butterfly valve is crafted in a variety of materials such as PTFE, PFA, Stainless Steel, UHMWPE and special alloys to fit a wide range of customer requirements. As with all products, precision manufacturing and exceptional quality remain the keys to a proven record of long service life.

Item

Name

Material

Qty.

1

Body

Ductile Iron 
Stainless Steel
Carbon Steel

1

2

Disc

Stainless Steel 
PTFE molded over stainless steel
PFA molded over stainless steel
UHMWPE molded over Stainless Steel
Hastelloy®
Titanium

1

3

Upper Stem

17-4 PH Stainless Steel

1

4

Lower Stem

17-4 PH Stainless Steel

1

5

Seat

PTFE
Conductive PTFE
UHMWPE

1

6

Bushing

Acetal
PTFE

1

7

Upper Stem Seal

BUNA-N
FKM*

1

8

Seal Capsule

PTFE/FKM

2

9

Bearing

PTFE/Steel

2

10

Seat Energizer

Silicone 
FKM*

2

11

Body Bolt

Stainless Steel

2

12

Retainer

Stainless Steel

1

13

Body Seal

Reinforced PTFE

2

14

ID Tag

Stainless Steel

1

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Valve Type:


Body:

· Shall be two piece wafer or lug design with extended neck to allow for 2" piping Insulation.

· Flange locating holes shall be provided on wafer bodies to allow for quick and precise alignment during valve installation.

· PTFE impregnated steel bearing shall be provided in the upper and lower valve journal for precision alignment of the upper and lower stem.

· Reinforced PTFE gaskets shall be placed between body halves to eliminate potential leak path and contamination from environmental conditions.

· Body bolts shall be 316 Stainless Steel.

Disc

· Disc edge and hub on metal discs shall be spherically machined and hand polished for minimum torque and maximum sealing capability.

· Lined discs shall have 1/8" (3mm) minimum thickness of pure, virgin PTFE or PFA encapsulated over the following metals: 2" - 12" (25mm-300mm) Valves - encapsulated over 316 Stainless Steel
14" - 24" (350mm-600mm) Valves - encapsulated over 17 - 4PH Stainless Steel

· Disc materials are to be fully certified and marked accordingly for trace ability.

Stem

· Shall be of two-piece design.

· No part of the stem shall be exposed to the line media.

· Disc-to-stem connection shall be an internal double "D" design with no possible leak paths in disc-to-stem connection. External disc-to-stem connections such as disc screws or pins are not allowed.

· Stem shall be mechanically retained in body neck for blowout proof protection and no part of the stem shall be exposed to line media.

· Stem materials are to be fully certified and marked accordingly for trace ability.

Seat

· Shall be designed to reduce seating/unseating torque and reduce wear on the contacting parts.

· Materials shall be pure, virgin PTFE, Conductive PTFE or UHMWPE with 1/8" (3mm) minimum thickness.

· Seat materials are to be fully certified and marked accordingly for trace ability.

· The design shall include a resilient seat energizer extending completely around the seat including the disc hub area to provide uniform force sufficient for tight shutoff.

· The seat shall totally encapsulate the body isolating it from the line media and no flange gaskets shall be required.

Testing:

Valve shall be tested to 110% of the rated pressure.

Pressure Ratings:

Valve shall be rated for bubble-tight shutoff at pressure rating shown below.

Bi-directional Service (With downstream flanges and disc in closed position):

All Series 22 and 23 Valves:

· 2"-24" (50mm-600mm) 150 psi (10.3 Bar)

Dead-End Service (No downstream flanges and disc in closed position):

All Series 23 Valves:

· 2"-12" (50mm-300mm) 75 psi (5.2 Bar)

· 14"-24" (350mm-600mm) 50 psi (3.4 Bar)

 


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