OVERVIEW: The Model YSS is a forged stainless steel Y-strainer with socket-weld ends, designed for compact, leak-free installation in high-pressure and corrosive fluid systems. Built from CF8M (316 stainless steel), it is ideal for demanding applications including chemical processing, steam, oil & gas, and high-purity water lines. Available in ANSI Class 600 and 1500 configurations (models YSS3 and YSS5), and in sizes from ½″ to 2″, the YSS offers exceptional pressure capacity with clean internal passages for minimal flow restriction. The 304 or 316 stainless steel perforated screen is housed in a precision-machined cavity and accessed through a threaded hex head cap for quick maintenance. A ¼″ NPT blow-off port is provided for inline purging. The socket-weld connections conform to ASME B16.11, making the YSS a preferred choice for permanent installations where flange or threaded joints are not acceptable.
| • Body: CF8M (316 stainless steel), forged | • Pressure classes: ANSI Class 600 (YSS3) and 1500 (YSS5) |
| • Ends: Socket-weld per ASME B16.11 | • Sizes: ½″ to 2″ |
| • Screen: 304 or 316 SS perforated; mesh inserts optional | • Cover: Threaded hex head cap |
| • Ports: ¼″ NPT blow-off port standard | • Testing: Hydrotested at 1.5× design pressure |
| • Applications: High-pressure chemical, steam, fuel, or clean water system | |
Complete dimensional and material data—see Submittal Sheet.
| MODEL | TYPE |
SIZE
(in)
|
CLASS | Cv |
PRESS (STEAM)
(psi)
|
PRESS (WOG)
(psi)
|
WT
(lbs)
|
A
(in)
|
B
(in)
|
C
(in)
|
D
(in)
|
ITEM NO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| YSS3 | SCREW CAP | 1/4 | 600 | 0.7 | 600 @ 489F | 1440 @ 100F | 1.50 | 2.93 | 2.37 | 2.62 | 1/4 | YSS3TI025 |
| YSS3 | SCREW CAP | 3/8 | 600 | 2 | 600 @ 489F | 1440 @ 100F | 1.50 | 2.93 | 2.37 | 2.62 | 1/4 | YSS3TI038 |
| YSS3 | SCREW CAP | 1/2 | 600 | 8 | 600 @ 489F | 1440 @ 100F | 1.50 | 2.93 | 2.37 | 2.62 | 1/4 | YSS3TI050 |
| YSS3 | SCREW CAP | 3/4 | 600 | 15 | 600 @ 489F | 1440 @ 100F | 2.50 | 3.68 | 2.81 | 3.37 | 3/8 | YSS3TI075 |
| YSS3 | SCREW CAP | 1 | 600 | 22 | 600 @ 489F | 1440 @ 100F | 5.00 | 4.56 | 3.68 | 4.75 | 3/8 | YSS3TI100 |
| YSS3 | SCREW CAP | 1 1/4 | 600 | 38 | 600 @ 489F | 1440 @ 100F | 5.50 | 4.93 | 4.12 | 5.25 | 3/4 | YSS3TI125 |
| YSS3 | SCREW CAP | 1 1/2 | 600 | 42 | 600 @ 489F | 1440 @ 100F | 9.00 | 5.56 | 4.75 | 6.00 | 3/4 | YSS3TI150 |
| YSS3 | SCREW CAP | 2 | 600 | 70 | 600 @ 489F | 1440 @ 100F | 13.00 | 6.93 | 6.00 | 7.25 | 1 | YSS3TI200 |
| YSSB3 | BOLTED COVER | 2 | 600 | 70 | 600 @ 489F | 1440 @ 100F | 13.00 | 7.50 | 6.00 | 7.25 | 1 | YSSB3TI200 |
| YSSB3 | BOLTED COVER | 2 1/2 | 600 | 110 | 600 @ 489F | 1440 @ 100F | 46.00 | 12.00 | 10.50 | 16.00 | 1 1/4 | YSSB3TI250 |
| YSSB3 | BOLTED COVER | 3 | 600 | 160 | 600 @ 489F | 1440 @ 100F | 4.5 | 12.00 | 3 | 4.25 | 1 1/4 | YSSB3TI300 |
| YSS5 | BOLTED COVER | 1/2 | 1500 | 6 | 1500 @ 603F | 3600 @ 100F | 4.5 | 3.94 | 3 | 4.25 | NA | YSS5TI050 |
| YSS5 | BOLTED COVER | 3/4 | 1500 | 11 | 1500 @ 603F | 3600 @ 100F | 8 | 4 1/4 | 3 3/4 | 5 1/4 | NA | YSS5TI075 |
| YSS5 | BOLTED COVER | 1 | 1500 | 16 | 1500 @ 603F | 3600 @ 100F | 12 | 6 | 5 3/4 | 7 | NA | YSS5TI100 |
| YSS5 | BOLTED COVER | 1 1/4 | 1500 | 32 | 1500 @ 603F | 3600 @ 100F | 27 | 8 3/8 | 5 1/2 | 8 | NA | YSS5TI125 |
| YSS5 | BOLTED COVER | 1 1/2 | 1500 | 34 | 1500 @ 603F | 3600 @ 100F | 26 1/2 | 8 3/8 | 5 1/2 | 8 | NA | YSS5TI150 |
| YSS5 | BOLTED COVER | 2 | 1500 | 60 | 1500 @ 603F | 3600 @ 100F | 44 1/2 | 10 1/2 | 9 1/4 | 11 | NA | YSS5TI200 |
| YSS5 | BOLTED COVER | 2 1/2 | 1500 | 140 | 1500 @ 603F | 3600 @ 100F | 96 | C/F | C/F | C/F | NA | YSS5TI250 |
| YSS5 | BOLTED COVER | 3 | 1500 | 140 | 1500 @ 603F | 3600 @ 100F | 104 | C/F | C/F | C/F | NA | YSS5TI300 |
| YSS6 | BOLTED COVER | 3/4 | 2500 | 9 | 2500 @ 673F | 6000 @ 100F | 34.50 | 9.25 | 8.55 | 11.00 | NA | YSS6TI075 |
| YSS6 | BOLTED COVER | 1 | 2500 | 9 | 2500 @ 673F | 6000 @ 100F | 31.00 | 9.25 | 8.55 | 11.00 | NA | YSS6TI100 |
| YSS6 | BOLTED COVER | 1 1/2 | 2500 | 30 | 2500 @ 673F | 6000 @ 100F | 75.00 | 12.00 | 9.00 | 14.00 | NA | YSS6TI150 |
| YSS6 | BOLTED COVER | 2 | 2500 | 42 | 2500 @ 673F | 6000 @ 100F | 75.00 | 12.00 | 9.00 | 14.00 | NA | YSS6TI200 |