OVERVIEW: The SIL-IW economical center-guided silent check valves with a cast iron body use a fully automatic spring assisted discs to eliminate water hammer while preventing flow reversal in the piping. The spring closure acts faster than swing check valves, which can slam shut with the flow reversal.
The wafer style body design is compact, versatile, and fits inside of the bolting in a flanged connection. For 2" to 10" diameters, the 125# wafer design allows for mating to either 125# or 250# flanges. For 8" and 10" diameters, a 250# wafer design is also available for mating to 250# flanges. Also available with grooved end adapters.
Standard discs for the SIL-IW from Stayflow are either nickel plated iron (shown below) or stainless steel, including with FM certification (both shown in submittals). Bronze is also available, with buna rubber disc seals if needed.
For clean liquids.
| MODEL | TYPE |
SIZE
(in)
|
ENDS | BODY MTL | SEAT | DISC | CLASS |
WT
(lbs)
|
A
(in)
|
B
(in)
|
NOTE | ITEM NO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NICKEL COATED DISC | WAFER | 2 | 125/250# FLGS | IRON | NICKEL PLATED IRON | STAINLESS STEEL | 125# | 5 | 4 1/4 | 2 5/8 | LEAD FREE | VCSIL-IW1NE0200 |
| NICKEL COATED DISC | WAFER | 2 1/2 | 125/250# FLGS | IRON | NICKEL PLATED IRON | STAINLESS STEEL | 125# | 8 | 5 | 2 7/8 | LEAD FREE | VCSIL-IW1NE0250 |
| NICKEL COATED DISC | WAFER | 3 | 125/250# FLGS | IRON | NICKEL PLATED IRON | STAINLESS STEEL | 125# | 11 | 5 3/4 | 3 1/8 | LEAD FREE | VCSIL-IW1NE0300 |
| NICKEL COATED DISC | WAFER | 4 | 125/250# FLGS | IRON | NICKEL PLATED IRON | STAINLESS STEEL | 125# | 18 | 7 | 4 | LEAD FREE | VCSIL-IW1NE0400 |
| NICKEL COATED DISC | WAFER | 5 | 125/250# FLGS | IRON | NICKEL PLATED IRON | STAINLESS STEEL | 125# | 27 | 8 3/8 | 4 3/4 | LEAD FREE | VCSIL-IW1NE0500 |
| NICKEL COATED DISC | WAFER | 6 | 125/250# FLGS | IRON | NICKEL PLATED IRON | STAINLESS STEEL | 125# | 52 | 9 3/4 | 5 1/2 | LEAD FREE | VCSIL-IW1NE0600 |
| NICKEL COATED DISC | WAFER | 8 | 125# FLGS | IRON | NICKEL PLATED IRON | STAINLESS STEEL | 125# | 86 | 13 3/8 | 6 1/2 | LEAD FREE | VCSIL-IW1NE0800 |
| NICKEL COATED DISC | WAFER | 10 | 125# FLGS | IRON | NICKEL PLATED IRON | STAINLESS STEEL | 125# | 129 | 16 | 8 1/4 | LEAD FREE | VCSIL-IW1NE1000 |
| NICKEL COATED DISC | WAFER | 8 | 250# FLGS | IRON | NICKEL PLATED IRON | STAINLESS STEEL | 250# | 92 | 13 3/8 | 6 1/2 | LEAD FREE | VCSIL-IW2NE0800 |
| NICKEL COATED DISC | WAFER | 10 | 250# FLGS | IRON | NICKEL PLATED IRON | STAINLESS STEEL | 250# | 137 | 16 | 8 1/4 | LEAD FREE | VCSIL-IW2NE1000 |