MRO Magazine

Hunt Valve Announces New Proportional Poppet Valve for Descaling Applications

July 5, 2016
By Business Wire News


Hunt Valve (, a fluid power engineering company specializing in severe-duty valves and components, has announced a new proportional poppet valve for descaling applications that lasts three to five times longer than traditional poppet valves. By eliminating the effects of water hammer and system shock, this innovative poppet valve technology promotes safety in the plant and cuts operating costs in half.

Programmable Variable Closing Speed Fights Water Hammer

At steel mills, persistent water hammer in high-pressure piping systems often leads to burst pipes, cracked welds and descale header damage. Hunt Valve’s proportional poppet descale valve can be programmed to eliminate water hammer in the system. Typically, the speed is only reduced for the last 10 to 20 percent of the stroke, just before completely shutting off flow to the descale header. This slow rate of closure can be fine-turned via the integrated local control interface or programmable logic controller (PLC).

“By replacing all fast-closing poppet valves in the descale system with Hunt Valve’s proportional poppet design and eliminating water hammer, companies save up to $250,000 a year in replacement costs for damaged descale headers and pipes,” explained Tim Pulcini, Hunt Valve’s business development representative. “This helps reduce annual plant operating costs for descale valves and piping by as much as 50 percent and decreases unexpected downtime.”

Ceramic Seating Extends Service Life

To combat the high-velocity fluid flow created by the valve’s slow rate of closure, the proportional poppet descale valve incorporates ceramic seating surfaces that prevent wear from the fluid flow. Optimizing the valve’s useful service life, the full ceramic seat is three to five times more durable than conventional seat materials such as heat-treated stainless steel. No other industrial valve manufacturer provides ceramic wear protection at this level.

Electromechanical Linear Actuator Simplifies Maintenance

The proportional poppet valve’s electromechanical linear actuator avoids the maintenance and reliability issues commonly associated with all types of media-actuated valves. Unlike traditional poppet valves that use dirty descale water as a hydraulic media to shift the main valve, the proportional poppet valve actuator is not a wetted part and is completely isolated from the descale water. Because it uses an electrical actuator, it eliminates the moisture and contamination problems associated with pneumatic actuation.

Extended Warranty Helps OEMs and Aftermarket Users

The proportional poppet descale valve is ideal for the OEM builder who wants to provide the highest level of customer satisfaction and avoid warranty issues after installation and start-up. However, if a failure occurs during this extended timeframe, it is covered. Because of the valve’s exceptional durability, Hunt Valve is able to offer this extended warranty, which allows the OEM to pass this benefit along to his or her customer.

Hunt Valve’s extended warranty also assures aftermarket customers that the valve technology will deliver a significantly longer service life than traditional poppet valves, resulting in maintenance cost savings over the life of the valve.

Additional Product Features

The proportional poppet descale valve incorporates Hunt Valve’s patented balance chamber design feature. It offers proximity switches or linear variable differential transformer (LVDT) position feedback for constant monitoring of the valve’s position. The valve has a pressure rating of 5,000 psi (320 bar) and is available in sizes DIN 10 to 250 (0.5” to 10” in diameter). It is offered as a drop-in replacement for an existing valve without requiring any costly piping modifications to install the new valve.

About Hunt Valve

Hunt Valve brings nearly 100 years of fluid power engineering innovations and solutions to a wide range of industrial and military customers. It specializes in severe-duty valves and complementary engineered components and system solutions for applications that include primary metals (steel, aluminum), energy (nuclear, hydro, downstream oil & gas), process (chemical) and U.S. Navy nuclear-powered vessels, including all submarines and carriers in operation as well as the Virginia Class, Ford Class and soon-to-be-in-production Ohio Replacement. To learn more about the Experts in Extreme Engineering, visit

Proportional poppet descale valve (click to view the high-res image).

Hunt Valve
Tim Pulcini
Industrial Business Development