Product part numbers may have changed. Please contact your local TDW representative to verify.
SANDWICH® Valve
![Sandwich valve for pipeline hot tapping procedures shown on a white background](/sites/default/files/2021-01/Components-SANDWICH-valve.jpg)
Equipment Type
![ISO-type-Valve-100ppi](/sites/default/files/2020-05/ISO-type-Valve-100ppi_0.png)
Pressure/ANSI Class
![ISO-Pressure-153-100ppi](/sites/default/files/2020-05/ISO-Pressure-153-100ppi.png)
Size
![ISO-sizes-4-48-100ppi](/sites/default/files/2020-06/ISO-sizes-4-48-100ppi.png)
The SANDWICH® Valve is designed for use with TDW Tapping, Plugging Machines, and fittings during hot tapping and plugging (HT&P) operations. SANDWICH® Valves have a flat faced, serrated gasket surface and are supplied to match ASME class 150, 300, or 600 flanges.
Specifications
- 4-inch through 48-inch
- Engineered to match ASME Class 150, 300 or 600 flanges
- Valves 24-inch and larger are hydraulically operated
Key Features
- Bidirectional design allows for installation in any direction
- Can be oriented parallel or perpendicular to the pipeline to fit the excavation
- Equipped with an oversized bore, positive shutoff, built-in pressure equalizing valve and integral flange studs
Common Applications
- Hot tapping and isolation operations, including tie-ins, crossovers, line extensions, connections, main relocations, and bypasses
![](/sites/default/files/2021-01/Components-SANDWICH-valve.jpg)
The SANDWICH® Valve is designed for use with TDW Tapping, Plugging Machines, and fittings during hot tapping and plugging (HT&P) operations. SANDWICH® Valves have a flat faced, serrated gasket surface and are supplied to match ASME class 150, 300, or 600 flanges.
Equipment Type
![](/sites/default/files/2020-05/ISO-type-Valve-100ppi_0.png)
Pressure/ANSI Class
![](/sites/default/files/2020-05/ISO-Pressure-153-100ppi.png)
Size
![](/sites/default/files/2020-06/ISO-sizes-4-48-100ppi.png)
Specifications
- 4-inch through 48-inch
- Engineered to match ASME Class 150, 300 or 600 flanges
- Valves 24-inch and larger are hydraulically operated
Key Features
- Bidirectional design allows for installation in any direction
- Can be oriented parallel or perpendicular to the pipeline to fit the excavation
- Equipped with an oversized bore, positive shutoff, built-in pressure equalizing valve and integral flange studs
Common Applications
- Hot tapping and isolation operations, including tie-ins, crossovers, line extensions, connections, main relocations, and bypasses