Prevent Unintended Restart of Rotating Equipment

Prevent Unintended Restart of Rotating Equipment

The new H&S Tool Clamshell with DEFENDER™ ‘Hands-Free’ Protection System will reshape the way you approach your pipe cutting, beveling, and end-prep jobs.  One key feature included in the DEFENDER™ Protection System is the Low-pressure Safety Interlock System designed to prevent unintended re-starts of rotating equipment after the loss of or interruption of air pressure.

The H&S TOOL Clamshell pipe cutting and beveling machine is available for purchase or rent. For more information contact your sales representative at +1-503-538-2185 or visit our website at


State of the Art in Pressure Relief Valve Testing - See it LIVE!

40 years ago, CALDER began manufacturing Valve Testers because founder, John Emmitte, realized that companies were not testing valves properly.  Now there’s a new lineup of state-of-the-art pressure relief valve testers that will once again raise the bar with unrivaled performance and ease of use.

Be the first to see it in action on July 13,  2022, at 7:00 am Pacific and 10:00 am Eastern.