(330) 337-9535 / (800) 321-2757

redboxnewpoppetvideothumb

Figure 1: Proportional poppet descale valve.

Figure 1: Proportional poppet descale valve.

Proportional Poppet Descale Valve

Hunt Valve’s proportional poppet valve for descaling applications 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, reduces annual operating costs and decreases unscheduled downtime in the plant.

 

Fight Water Hammer and Cut Operating Costs

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.

Figure 2: Damaged seat on conventional poppet valve due to high-velocity flow (wire draw). Proportional poppet descale valve’s ceramic seat design prevents this scenario.

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 design and eliminating water hammer, companies save up to $250,000 a year in replacement costs for damaged descale headers and pipes. This helps reduce annual plant operating costs for descale valves and piping by as much as 50 percent and decreases unexpected downtime.

Key Savings and Results

  • Save up to $250,000 a year in replacement costs
  • Cut operating costs up to 50%
  • Extend service life as much as 3–5 times

Ceramic Seating Optimizes Valve’s 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.

 

Figure 3: High-maintenance pilot valve filter required for traditional poppet descale pilot valves (not required for proportionally controlled poppet descale valves).

Electromechanical Linear Actuator Prevents Maintenance Issues

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 is not a wetted part and is totally isolated from the descale water. Since it uses an electrical actuator, it eliminates the moisture and contamination problems associated with pneumatic actuation.

 

Extended Warranty Benefits OEMs and Aftermarket Customers

In addition to maintenance benefits and reduced operating costs, 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 on to his or her customer.

In addition, Hunt Valve’s extended warranty 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.

Figure 4: Several failed pilot valves staged to be sent back to the remanufacturer for repair/rebuilding. Dirty descale water causes the internal components of the pilot valves to fail quickly, creating constant maintenance issues for hydraulic-operated descale valves.

Figure 4: Several failed pilot valves staged to be sent back to the remanufacturer for repair/rebuilding. Dirty descale water causes the internal components of the pilot valves to fail quickly, creating constant maintenance issues for hydraulic-operated descale valves.

 

Additional Product Features Enhance Value

The proportional poppet descale valve:

  • Incorporates Hunt Valve’s patented balance chamber design feature.
  • Offers proximity switches or linear variable differential transformer (LVDT) position feedback for constant monitoring of the valve’s position.
  • Has a pressure rating of 5,000 psi (320 bar).

This product is available in sizes DIN 10 to 250 (0.5” to 10” in diameter). It’s also offered as a drop-in replacement for an existing valve without requiring any costly piping modifications to install the new valve.