HSR High-Security Valve Restraints

HSR High-Security valve restraints are a reliable, economical solution to the problems of ordinary single-bolt (jack bolt) designs.

Single-bolt restraints require extreme torque to install and often loosen during operation. This creates a dilemma: continuing to increase torque can distort the valve cover gasket, allowing gas leaks or causing damage to the valve cage or cylinder gasket shelf. However, continued operation with a loose assembly can also damage studs, cages, valves or cylinders. Even worse, debris from failed components can enter the cylinder, resulting in catastrophic cylinder component failures and serious safety issues.

Multiple Studs Distribute Load, Improve Sealing

HSR restraints distribute load over multiple studs for reliable, long-lasting valve retention. Each stud requires less than half the torque of single-bolt designs, so installation is easier and loading on valves is more accurate. Just as important, HSR restraints stay tight without the need for periodic tightening. HSR restraints have O-ring seals, which contain gases much better than thread seals, gaskets or obsolete lead washers. The O-ring seal design – combined with lower torque requirements – simplifies maintenance, drastically reduces fugitive emissions and all but eliminates safety concerns.

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