Analysis of problems existing in operation of regulating valve in complicated working condition

Regulating valves operating under complex conditions often face severe challenges such as corrosion, cavitation, erosion, blockage, and scratching. These issues can cause serious damage to the valve's sealing surfaces, leading to unreliable sealing performance and a significantly shortened service life. For decades, domestic regulating valves have struggled with these chronic problems. However, the full-featured ultra-light control valve has overcome the traditional limitations of cumbersome design and limited functionality, focusing on solving the most challenging sealing issues. First, let's understand what constitutes complex conditions and the problems they cause: 1. **High pressure and large pressure differential** – This leads to severe erosion or cavitation, which directly affects the lifespan of the seal. 2. **High temperature and large temperature differences** – Thermal expansion and contraction can alter the material properties at room temperature, causing leakage, jamming, or even the valve becoming stuck. 3. **Impure media** – Contaminants in the medium can cause serious erosion, blockage, and scratches on the valve core, affecting both movement and sealing. 4. **Corrosive media** – Direct contact with corrosive substances can damage the sealing materials over time. 5. **VI-level hard-seal shut-off** – Especially under high-pressure conditions, the valve seat and plug must close tightly, but the friction during opening and closing can damage the sealing surface. In summary, under harsh working conditions such as severe cavitation, erosion, corrosion, thermal expansion, blockage, and scratching, achieving a VI-level hard seal is extremely difficult. For decades, these challenges have plagued regulating valves, making them prone to failure. Second, let’s look at the reliability of traditional sealing structures: 1. **Soft seals made of soft materials** – While easy to seal, the materials are not durable, leading to poor long-term reliability. 2. **Soft seal against stainless steel** – Slightly better than the first option, but still not reliable enough for demanding applications. 3. **Stainless steel vs. stainless steel** – A slight improvement, but the hardness of stainless steel (HRC 20–25) is still too low for reliable sealing. 4. **Multi-layer sealing seats** – Combining stainless steel sheets with soft materials improves temperature resistance, but the sealing reliability remains limited. 5. **Wear-resistant alloy surfacing** – Typically using Stellite alloys, this is currently the best sealing material available. However, its hardness (HRC 40–45) is still insufficient for extreme environments. 6. **Ceramic seals** – Although very hard, ceramics lack toughness and are prone to cracking, even without initial damage. Through continuous innovation, the ultra-light control valve addresses these issues by integrating advanced materials and intelligent design, offering a reliable solution for even the most challenging industrial environments.

DOM Tube

TORICH is specialized manufacturer and supplier of DOM STEEL TUBE, DOM STEEL TUBING,DOM Tubing, DOM STEEL PIPE.

DOM Steel Tubes, are produced with Cold Drawn Process based on ERW Steel Tubes, to achieve Good outside and inside surface,

the advantage of the production is better Concentricity and Ovality, to reduce deviation of Roundness of the steel tubes.

DOM Steel Tubing is also called Welded Cold Drawn Precision Steel Tubes.

 

Technical Standard:

ASTM A513 Type5, Type 6, SSID

EN10305-2

SAE J525

 

Products Application:
Oil Cylinders
Air Cylinder,
Automotive Cylinder Liners
Jack Lifting
Telescopic Systems
Pneumatic Cylinders
Gas Spring Cylinders

Race Car Frames

Roll Cages

Motorcycle Frames

Spindles

Rollers

Shafts

Bushings

Clinders, Bore Cylinders

Size range is:
O.D. 4-350mm,
W.T. 0.5-30mm,
Length: according to customer`s requirement and agreement

 

 

 

DOM Round Steel Tube, is a ERW welded mechanical round steel tube with the internal weld seam removed achieving a smooth internal surface.

DOM round steel tube has been drawn over a mandrel and die to produce a tube having more accurate dimensional tolerances, and a very smooth inside and outside finish. DOM round steel tube is ideal for more stressful applications requiring higher quality, increased mechanical properties, uniformity, strength, and soundness.

Dom Tube,Seamless Welded Pipes,Thin Wall Steel Tube,Drawn Over Mandrel Steel Tube

TORICH INTERNATIONAL LIMITED , https://www.steeltubepipechina.com