The Cla-Val Model 81-01 and 681-01 Check Valve are hydraulically operated No-Slam Check Valves. Both valves open when the pressure at the inlet exceeds the discharge pressure. A gradual rate of opening prevents sudden opening surges. When a pressure reversal occurs the higher downstream pressure is applied to the cover chamber through the control tube lines, and the valve closes drip tight.
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| SIZE | WALL THICKNESS | LENGTH | HOLE SIZE |
| 41mm x 21mm | 1.5mm | 3.00 meters | 14mm x 30mm |
A156Y001: Rough brass
A156Y005: Rough brass
A156Y031: Polished brass
A156Y035: Polished brass
A156X001: Rough chrome
A156X005: Rough chrome
A156X031: Polished chrome
A156X035: Polished chrome
| Code | Size |  |
 |
BIM(revit) | CAD(dxf) | Certification |
|---|---|---|---|---|---|---|
| A156Y001 | 1 1/2″ NPT F x 1 1/2″ NST M | 1 | 0 | – | – | |
| A156Y005 | 2 1/2″ NPT F x 2 1/2″ NST M | 1 | 0 | – | – | |
| A156Y031 | 1 1/2″ NPT F x 1 1/2″ NST M | 1 | 0 | – | – | |
| A156Y035 | 2 1/2″ NPT F x 2 1/2″ NST M | 1 | 0 | – | – | |
| A156X001 | 1 1/2″ NPT F x 1 1/2″ NST M | 1 | 0 | – | – | |
| A156X005 | 2 1/2″ NPT F x 2 1/2″ NST M | 1 | 0 | – | – | |
| A156X031 | 1 1/2″ NPT F x 1 1/2″ NST M | 1 | 0 | – | – | |
| A156X035 | 2 1/2″ NPT F x 2 1/2″ NST M | 1 | 0 | – | – |
| SIZE | OUTSIDE DIAMETER | WALL THICKNESS | LENGTH |
| 1/2 | 17.93mm | 1.07mm | 3.05 meters |
| 3/4 | 23.42mm | 1.24mm | 3.05 meters |
| 1″ | 29.54mm | 1.45mm | 3.05 meters |
| 1 1/4 | 38.35mm | 1.65mm | 3.05 meters |
| 1 1/2 | 44.20mm | 1.65mm | 3.05 meters |
| 2″ | 55.80mm | 1.65mm | 3.05 meters |
| A7AY001 | 1 1/2″ NST |
A98Y001: Rough brass – 2 way-angle
A98Y002: Rough brass – 2 way-angle
A98Y101: Rough brass – 2 way-angle
A98Y102: Rough brass – 2 way-angle
A98Y201: Rough brass – 3 way-angle
A98Y202: Rough brass – 3 way-angle
A98Y251: Rough brass – 3 way-angle
| Code | Size | |
|
BIM(revit) | CAD(dxf) | Certification |
|---|---|---|---|---|---|---|
| A98Y001 | 4″ NPT F x 2 1/2″ NPT M | 1 | 0 | – | – | |
| A98Y002 | 4″ NPT F x 2 1/2″ NST M | 1 | 0 | – | – | |
| A98Y101 | 6″ NPT F x 2 1/2″ NPT M | 1 | 0 | – | – | |
| A98Y102 | 4″ NPT F x 2 1/2″ NST M | 1 | 0 | – | – | |
| A98Y201 | 6″ NPT F x 2 1/2″ NPT M | 1 | 0 | – | – | |
| A98Y202 | 6″ NPT F x 2 1/2″ NST M | 1 | 0 | – | – | |
| A98Y251 | 4″ NPT F x 2 1/2″ NPT M | 1 | 0 | – | – |
A204Y001: Rough bronze
| Code | Size | |
|
BIM(revit) | CAD(dxf) | Certification |
|---|---|---|---|---|---|---|
| A204Y001 | 2 1/2″ NPT F x 2 1/2″ NST M | 1 | 0 | – | – |
| Code | Size | |
|
BIM(revit) | CAD(dxf) | Certification |
|---|---|---|---|---|---|---|
| A98Y001 | 4″ NPT F x 2 1/2″ NPT M | 1 | 0 | – | – | |
| A98Y002 | 4″ NPT F x 2 1/2″ NST M | 1 | 0 | – | – | |
| A98Y101 | 6″ NPT F x 2 1/2″ NPT M | 1 | 0 | – | – | |
| A98Y102 | 4″ NPT F x 2 1/2″ NST M | 1 | 0 | – | – | |
| A98Y201 | 6″ NPT F x 2 1/2″ NPT M | 1 | 0 | – | – | |
| A98Y202 | 6″ NPT F x 2 1/2″ NST M | 1 | 0 | – | – | |
| A98Y251 | 4″ NPT F x 2 1/2″ NPT M | 1 | 0 | – | – |
A53Y001: Rough brass – With pin lug cap and chain
A53Y002: Rough brass – With pin lug cap and chain
A53Y021: Rough brass
A53Y022: Rough brass
A53Y041: Polished brass – With pin lug cap and chain
A53Y042: Polished brass – With pin lug cap and chain
A53Y061: Polished brass
A53X001: Rough chrome – With pin lug cap and chain
A53X041: Polished chrome – With pin lug cap and chain
A53X061: Polished chrome
| Code | Size | |
|
|---|---|---|---|
| A53Y001 | 2 1/2″ NPT F x 2 1/2″ NST M | 1 | 0 |
| A53Y002 | 3″ NPT F x 2 1/2″ NST M | 1 | 0 |
| A53Y021 | 2 1/2″ NPT F x 2 1/2″ NST M | 1 | 0 |
| A53Y022 | 3″ NPT F x 2 1/2″ NST M | 1 | 0 |
| A53Y041 | 2 1/2″ NPT F x 2 1/2″ NST M | 1 | 0 |
| A53Y042 | 3″ NPT F x 2 1/2″ NST M | 1 | 0 |
| A53Y061 | 2 1/2″ NPT F x 2 1/2″ NST M | 1 | 0 |
| A53X001 | 2 1/2″ NPT F x 2 1/2″ NST M | 1 | 0 |
| A53X041 | 2 1/2″ NPT F x 2 1/2″ NST M | 1 | 0 |
| A53X061 | 2 1/2″ NPT F x 2 1/2″ NST M | 1 | 0 |
A88GY003: Rough brass
A88GY005: Rough brass
| Code | Size | |
|
BIM(revit) | CAD(dxf) | Certification |
|---|---|---|---|---|---|---|
| A88GY003 | 2 1/2″ NPT M x 2 1/2″groove | 1 | 0 | – | – | |
| A88GY005 | 4″ NPT M x 4″groove | 1 | 0 | – | – |
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