Hydrostatic Test Isolation Plugs

Pressure ratings vary by product. Folding head models like the FH1412, FH2416, and FH4836 are rated to 250 psi for the folding head assembly. The Pivoting Head Linestop Machine offers the highest rating at 450 psi at 250°F, ideal for high-pressure and high-temperature industrial applications.

Yes. Schallert's line stop isolation plugs are specifically designed for live-line operations, allowing maintenance, valve repair or replacement, and pipeline section work without any service disruption to end users. This is one of the primary advantages of using folding or pivoting head linestop equipment.

Folding heads insert through a reduced branch fitting smaller than the pipe being stopped, lowering costs on taps, valves, and fittings. They're suited for standard water, wastewater, and industrial pipelines up to 250 psi. Pivoting heads provide a size-on-size line stop solution rated to 450 psi at 250°F, designed for high-pressure, high-temperature, or hazardous chemical and gas applications.

Schallert offers multiple sealing element materials to match the pipeline medium. Buna-N rubber is the standard material. EPDM and Viton are available as alternatives, particularly for the Pivoting Head Linestop Machine, making it suitable for hazardous gases, chemicals, and demanding temperature conditions found in mills and refineries.

Yes. A complete line stop assembly typically requires a linestop head (folding or pivoting), a compatible housing, a jackscrew actuator (such as the JS048-200 or JS072-300), and a plug setter (such as the PS1836 for larger pipes). Schallert manufactures all these components and provides compatibility specifications for each product to simplify selection.

Yes. All Schallert Enterprises tapping machines and line stop equipment are manufactured in the USA at their facility in Lake Elsinore, CA. This ensures consistent quality control, and the company also offers custom equipment manufacturing to fit exact customer specifications across any pipe size or application requirement.