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Ladish MEGA Metal Seated Ball Valve


One of five 12″ CF8M Metal Seated Ball Valves w/ AIT Gears


ME
GA Seal Metal Seated Ball Valves
  • Dirty, Erosive and / or Mild Corrosive Service to 850F
  • Graphite Energized Seats with Seat and Ball Coating based on Service Conditions. Class 150, 300 and 600
  • Applications Include Ethylene, VCM, Catalyst / Powder Feed, Furnace Transfer Lines
  • Generally Manual Valves or infrequent on/off where contaminants can “lock” more Severe Service Valves
MEGA Seal Graphite Seated Ball Valves
  • “Clean” Service, 450F to 1000F
  • Strong Acids and Oxidizers where Coatings of Metal Seated Valves will not Function (e.g. HF, Chlorine)
  • 50% Torque Requirement vs. Metal Seated
  • P/T Rating to ASME B16.34 Valve Body. Generally Class 300 and 600.


12″ CF8M Metal Seated Ball Valves


Assembling

  
Testing

   GRAPHITE SEATED   METAL SEATED
Class 300 and 600Class 150 – 600
Flanged EndsSW/BW, RFF, RTJ End Connection Possible
¾” – 8”.5” – 14”
Split Body or Unibody, Full or Reduced PortSplit Body or Unibody, Full or Reduced Port
Target Market: SPECIALTY CHEMICALS.  Clean High Temperature and Acid Service with Temperatures above 450F (up to 1000F)Target Market: Petrochemical and Chemical

•High Temperature

•Solids Handling

•ETHYLENE and VCM

•Alloy Options include 316SS, Monel, Inconel, etc.

API 598 ShutoffAPI 598 Shutoff (HP Test Included)
Full Alloy Options (Hastelloy, Inconel, Incoloy, Monel, etc.)
What are “Metal Seats”?
  • Base Metal Contact (Gate and Globe Valves – Not Sliding Wear)
  • Coated or Modified Metal (Most Common)
  • Stellite Weld Overlay (Usually Stellite VI – Cobalt Based)
  • “Surface Modification” of Sealing Surfaces: Ex. Nitriding, Boronizing, etc.
  • Plating: Ex. Chromium Plating or ENP (Electroless Nickel Plating)
  • HVOF Coating: Tungsten and Chromium Carbide are the most common
  • Fused or Vacuum Deposition of “Coating” typically Tungsten Carbide
  • There is no “One size fits all” for “Metal-to-metal” sealing. Coatings are very application dependent.
Metal Seated Valve Coating – Metal seated valves represent the fastest growing (by %) segment of the valve industry. These seats can be found in ball valves, butterfly valves, plug valves and others.
1. HP-HVOF Process
  • Chrome Carbide, Tungsten Carbide, Chrome Oxide and other specially formulated coatings.
    • Cr3C2-NiCr
    • WC-Co / WC-Ni  /  WC-Co-Cr  /  WC-CrC-Ni
  • Coating mechanically bonds to the Substrate Material.
  • Mechanical bond – >12,000 psi bond strength for Carbides, 5,000 – 7,000 psi for Chrome Oxide Ceramic.
  • Robotically positioned spray gun creates high kinetic energy allowing the coatings to be applied in a compressive state.
  • Problems:
    • Porosity – Poor Sealing on Gas
    • Carbon Content makes these coatings vulnerable to Oxidation.
Ladish Valve Coating Technology

Ladish Valve Coating Technology


2. Spray & Fused Process
  • Substrate material becomes annealed due to fusing temperatures; subsequent heat treatment required.
  • Semi-molten coating “sags” or “sloughs” – gravity effect
  • Coated Surface is “finish” machined using either CBN (cubic boron nitride) or PCD (polycrystalline diamond) tooling.
  • Very Low Porosity – Best for small molecule gas and particles smaller than 1 micron.
Vacuum Testing of Valve Trim Sets Prior to Installation

Ladish Ball and Seat

Key Petrochemical Processes for Ladish MEGA Seal & “S” Series Ball Valves
  • VCM (Vinyl Chloride Monomer) – Stainless, Monel and Inconel Valves for Acid from Chlorine.  Nickel Alloys becoming more Prevalent at 600+ F
  • Ethanol/Methanol – Stainless Steel for Acid Attack
  • Propylene / Ethylene Oxide / PDH – Reactive Chemicals require High Alloy valves with little Corrosion.  Oxygen Service Valves are common and use Stainless and Hastelloy
  • Polyethylene / Polypropylene Production – Business is in Additive Handling and Ball Valves.  Hastelloy and Stainless Steel are used so that Iron (from Carbon Steel) does not contaminate the process.
  • Phenol, Cumene, Butadiene – These are Reactive Chemicals requiring Nickel Alloys due to ORGANIC Acids.
  • Ammonia / Nitric Acid – Stainless (304) and Monel to Resist Attack
  • Ethylene: Pyrolysis Oils and Start-Up Vent Valves
Click here for a complete product over, dimensional data & more for the MEGA Seal Series.

Once again, Ladish will continue To Mark Progress.

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281.880.8560 or 866-523-4740

7603 Bluff Point Dr. Houston, TX 77086, United States

sales@ladishvalves.com

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HAVE YOU HEARD THE NEWS?

We are excited to announce that effective November 1, 2020 we have purchased the trademarks and all assets related to Smith Valves & Diamond Gear from CNC Flow Control!

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