OVERVIEW: Stayflow Y Series Polypropylene Butterfly Valve Seats depart from traditional liner-seat type valves for improved performance, ease of operation and superior sealing. Engineered for high volume flow control or throttling, this high performance valve is ideally suited for use in applications requiring Polypropylene’s broad range of chemical resistance, such as Industrial & Chemical Processing, Mining, Pulp & Paper, Water Parks, and Municipal Water & Waste Water Treatment. Manufactured from UV stabilized Polypropylene in IPS sizes 1-1/2" to 24" with custom produced 30"- 60" valves available.
DESIGN:
- Special off-set Disc lifts quickly from seat to reduce wear and reduce operating torque.
- Patented Limited Contact Seat design provides free travel - eliminates seat creep, extrusion and wear. Field replaceable without full valve disassembly.
- Interlocking Body & Seat prevents wash-out or blow-out.
- Buna-N, EPDM or FKM Seat & Seals.
- Fully Isolated Solid Type 316L Stainless Steel Stem
- Reversible High Impact Polypropylene Lever Handle with 7-Position stops & Built-in Lockout (standard handle on 1-1/2" – 8" valves; not available on 10" & larger valves)
- High Efficiency Gear Operator with Cast Aluminum Housing, Polypropylene Handwheel, and Built-in Position Indicator (available for all sizes; standard on 10" & larger valves)
- Special order gear operators available for a variety of submersible and other environmental applications.
- ANSI/ASME B16.5 Class 150 Bolt Pattern
Suitable for Oil-Free air handling to 25 psi, not for distribution of compressed air or gas.
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| MODEL |
SIZE
(in)
|
ENDS | BODY MTL | SEAT | Cv |
WT
(lbs)
|
NOTE | ITEM NO |
|---|---|---|---|---|---|---|---|---|
| VBFLY-YS | 1 1/2 | 150# STD FLG | POLYPRO | EPDM | 81 | 2.12 | LEVER HANDLE | VBFLY-YSYE0150 |
| VBFLY-YS | 2" | 150# STD FLG | POLYPRO | EPDM | 109 | 2.5 | LEVER HANDLE | VBFLY-YSYE0200 |
| VBFLY-YS | 2 1/2" | 150# STD FLG | POLYPRO | EPDM | 192 | 2.83 | LEVER HANDLE | VBFLY-YSYE0250 |
| YBFLY-YS | 3" | 150# STD FLG | POLYPRO | EPDM | 345 | 5.01 | LEVER HANDLE | VBFLY-YSYE0300 |
| VBFLY-YS | 4" | 150# STD FLG | POLYPRO | EPDM | 411 | 6.13 | LEVER HANDLE | VBFLY-YSYE0400 |
| VBFLY-YS | 6" | 150# STD FLG | POLYPRO | EPDM | 1125 | 10.17 | LEVER HANDLE | VBFLY-YSYE0600 |
| VBFLY-YS | 8" | 150# STD FLG | POLYPRO | EPDM | 2249 | 14.68 | LEVER HANDLE | VBFLY-YSYE0800 |
| VBFLY-YS | 10" | 150# STD FLG | POLYPRO | EPDM | 4440 | 25.69 | GEAR HANDLE | VBFLY-YSYE1000 |
| VBFLY-YS | 12" | 150# STD FLG | POLYPRO | EPDM | 6309 | 35.07 | GEAR HANDLE | VBFLY-YSYE1200 |
| VBFLY-YS | 14" | 150# STD FLG | POLYPRO | EPDM | 7048 | 68.61 | GEAR HANDLE | VBFLY-YSYE1400 |
| VBFLY-YS | 16" | 150# STD FLG | POLYPRO | EPDM | 8455 | 126.97 | GEAR HANDLE | VBFLY-YSYE1600 |
| VBFLY-YS | 18" | 150# STD FLG | POLYPRO | EPDM | 10920 | 117.48 | GEAR HANDLE | VBFLY-YSYE1800 |
| VBFLY-YS | 20" | 150# STD FLG | POLYPRO | EPDM | 14180 | 155.36 | GEAR HANDLE | VBFLY-YSYE2000 |
| VBFLY-YS | 24" | 150# STD FLG | POLYPRO | EPDM | 18660 | 215.25 | GEAR HANDLE | VBFLY-YSYE2400 |
| VBFLY-YS | 1 1/2" | 150# SD FLG | POLYPRO | FKM | 81 | 2.12 | LEVER HANDLE | VBFLY-YSYV0150 |
| VBFLY-YS | 2" | 150# STD FLG | POLYPRO | FKM | 109 | 2.5 | LEVER HANDLE | VBFLY-YSYV0200 |
| VBFLY-YS | 2 1/2" | 150# STD FLG | POLYPRO | FKM | 192 | 2.83 | LEVER HANDLE | VBFLY-YSYV0250 |
| VBFLY-YS | 3" | 150# STD FLG | POLYPRO | FKM | 345 | 5.01 | LEVER HANDLE | VBFLY-YSYV0300 |
| VBFLY-YS | 4" | 150# STD FLG | POLYPRO | FKM | 411 | 6.13 | LEVER HANDLE | VBFLY-YSYV0400 |
| VBFLY-YS | 6" | 150# STD FLG | POLYPRO | FKM | 1125 | 10.17 | LEVER HANDLE | VBFLY-YSYV0600 |
| YBFLY-YS | 8" | 150# STD FLG | POLYPRO | FKM | 2249 | 14.68 | LEVER HANDLE | VBFLY-YSYV0800 |
| VBFLY-YS | 10" | 150# STD FLG | POLYPRO | FKM | 4440 | 25.69 | GEAR HANDLE | VBFLY-YSYV1000 |
| VBFLY-YS | 12" | 150# STD FLG | POLYPRO | FKM | 6309 | 35.07 | GEAR HANDLE | VBLFY-YSYV1200 |
| VBFLY-YS | 14" | 150 # STD FLG | POLYPRO | FKM | 7048 | 68.61 | GEAR HANDLE | VBFLY-YSYV1400 |
| VBFLY-YS | 16" | 150# STD FLG | POLYPRO | FKM | 8455 | 126.97 | GEAR HANDLE | VBFLY-YSYV1600 |
| VBFLY-YS | 18" | 150# STD FLG | POLYPRO | FKM | 10920 | 117.48 | GEAR HANDLE | VBFLY-YSYV1800 |
| VBFLY-YS | 20" | 150# STD FLG | POLYPRO | FKM | 14180 | 155.36 | GEAR HANDLE | VBFLY-YSYV2000 |
| VBFLY-YS | 24 | 150# STD FLG | POLYPRO | FKM | 18660 | 215.25 | GEAR HANDLE | VBFLY-YSYV2400 |
| VBFLY-YS | 1 1/2 | 150# STD FLG | POLYPRO | BUNA-N | 81 | 2.12 | LEVER HANDLE | VBFLY-YSYB0150 |
| VBFLY-YS | 2 | 150# STD FLG | POLYPRO | BUNA-N | 109 | 2.5 | LEVER HANDLE | VBFLY-YSYB0200 |
| VBFLY-YS | 2 1/2" | 150# STD FLG | POLYPRO | BUNA-N | 192 | 2.83 | LEVER HANDLE | VBFLY-YSYB0250 |
| VBFLY-YS | 3" | 150# STD FLG | POLYPRO | BUNA-N | 345 | 5.01 | LEVER HANDLE | VBFLY-YSYB0300 |
| VBFLY-YS | 4" | 150# STD FLG | POLYPRO | BUNA-N | 411 | 6.13 | LEVER HANDLE | VBFLY-YSYB0400 |
| VBFLY-YS | 6" | 150# STD FLG | POLYPRO | BUNA-N | 1225 | 10.17 | LEVER HANDLE | VBFLY-YSYB0600 |
| VBFLY-YS | 8" | 150# STD FLG | POLYPRO | BUNA-N | 2249 | 14.68 | LEVER HANDLE | VBFLY-YSYB0800 |
| VBFLY-YS | 10" | 150# STD FLG | POLYPRO | BUNA-N | 2249 | 18.23 | GEAR HANDLE | VBFLY-YSYB1000 |
| VBFLY-YS | 12" | 150# STG FLG | POLYPRO | BUNA-N | 4440 | 25.69 | GEAR HANDLE | VBFLY-YSYB1200 |