Boiler blowdown service is one of the harshest environments for valves:
Most valve types experience seat washout, galling, packing blowout, and leakage over time.
Everlasting Valve’s rotating-disc blowdown design has been the industry benchmark for over 100 years.
Initially produced in 1906, our flagship product, the boiler blowdown valve, was designed to efficiently remove sludge and other impurities that accumulate during steam boiler operation. This valve is meticulously engineered for the most demanding industrial settings. Unlike conventional globe valves, which tend to deteriorate rapidly in industrial steam applications, our valve’s unique design prevents the ingress of dirt and scale into the valve seat, ensuring reliable sealing and preventing premature failure.
Movement drives rotation providing self-lapping to enhance performance and extended life.
Positive Shut-off: Leak rates are less than industry standard ANSI B.16.34; MSS-SP61 for metal seated valves.
The spring-loaded disc is held firmly against the path that it travels.
Self-lapping disc ensures positive shut-off
Shearing action wipes media away to seal
Valve body design creates a vortex, self-cleaning
Disc pressure ensures positive seal
Value bodies are available in a wide choice of materials
EV Valves may be used for converging applications
Self-lapping disc design
Everlasting Valves are designed for the most severe applications
Blowdown Flash Tank / Heat Recovery System Isolation
Guide users from boiler service conditions to the most likely Everlasting Valve direction — quick-opening, slow-opening, duplex / tandem blowdown, or severe-service review.
Use this as a front-end guide. Final valve selection should be reviewed against pressure, temperature, connection, code requirements, media, cycle frequency, and installation layout.
Best starting direction for intermittent bottom blowdown or drain points where fast opening and positive shutoff are required in scale-forming boiler service.
Boiler systems operate with high-temperature water and steam, scale, sediment, flashing flow, and frequent cycling. These conditions cause conventional valves to leak, seize, or suffer rapid seat erosion
Everlasting’s self-lapping rotating disc technology provides tight shut-off, self-cleaning action, and resistance to scale and thermal stress. The sealing surfaces polish with each cycle, improving performance over time.
Common services include:
Each actuation slightly rotates the disc, wiping away scale and sediment while evenly distributing wear. This prevents sticking, leakage, and premature seat damage.
Yes. Self-cleaning and self-lapping action significantly reduce scale buildup and packing wear, extending service intervals and lowering total maintenance costs.
Absolutely. Everlasting boiler blowdown valves routinely replace globe, gate, and plug valves that suffer leakage and short life in high-temperature blowdown service.
Longer service life, fewer valve failures, and consistent sealing performance improve boiler uptime and reduce unplanned outages.
