· 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
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 | 1 |
2 | Disc | Stainless Steel | 1 |
3 | Upper Stem | 17-4 PH Stainless Steel | 1 |
4 | Lower Stem | 17-4 PH Stainless Steel | 1 |
5 | Seat | PTFE | 1 |
6 | Bushing | Acetal | 1 |
7 | Upper Stem Seal | BUNA-N | 1 |
8 | Seal Capsule | PTFE/FKM | 2 |
9 | Bearing | PTFE/Steel | 2 |
10 | Seat Energizer | Silicone | 2 |
11 | Body Bolt | Stainless Steel | 2 |
12 | Retainer | Stainless Steel | 1 |
13 | Body Seal | Reinforced PTFE | 2 |
14 | ID Tag | Stainless Steel | 1 |
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 · 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) | |
