TDW SANDWICH® valves can be used with TDW tapping machines, STOPPLE® plugging machines, and fittings with LOCK-O-RING® flanges. The valves average 75 percent less face-to-face dimension than traditional valves, which reduces installation time and allows for ease of use in hot tapping and plugging (HT&P) applications where space is limited.
SANDWICH valves are bidirectional and feature flat-faced, serrated gasket surfaces. Designed to match ASME Class 150, 300, or 600 flanges, the valves can be oriented parallel or perpendicular to the pipeline for added flexibility. They are available in a variety of sizes, ranging from 4-inch to 48-inch, and can accommodate the specific demands of any hot tapping and plugging operation.
- The valves are equipped with an oversized bore, positive shutoff, built-in pressure equalizing valve, and integral flange studs.
- Valves 24 inches and larger are hydraulically operated.
- The bidirectional design allows for installation in any direction as long as the valve bore is in line with the fitting bore.
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