Cracking process

Guichon manufactures valves specially adapted to ethylene craking :

Transfert Line and Decoke Valve

Slide gate valve w. fixed seats
Type : 205

DN 4" to 40" Class 150 to 300 Lbs
– Fabricated (welded) construction
– Carbon steels or low alloy steeels
Slide Gate Valve with floating seats
Type : 202

DN 4" to 40" Class 150 Lbs
– Fabricated (welded) construction

– Carbon steels or low alloy steels

Double disc through Conduit Gate Valve
Type : TLV3

(N)D(N) 6" to 56" Class 150 to 600 Lbs
– Fabricated (welded) or casted cast
– Custom materials

Construction

  • Construction materials: Carbon Steel (CS), Stainless Steel (SS), Duplex & Super Duplex, Titanium, Zirconium, Uranus® B6, Tantalum, Nickel, Hastelloy®, Monel
  • Construction methods: Fabricated (Welded), Cast, Solid/Forged

Uses

  • Service conditions: High pressure, High temperature, Abrasion, Corrosion, High viscosity, Reliability, Dead space free
  • Types of fluids: Liquids, Liquids with solid particles – Slurry, Gas, Powder and powdery media, High viscosity fluids

FAQ - Ethylene cracking

Ethylene cracking – Chemical formula :

Ethane = Ethylene + Hydrogen
C2H6 = C2H4 + H2
Ethylene = C2H1

Posted in: FAQ - Ethylene cracking

Cracking process – Recommended valves :

The contraints related to steam cracking are :
1 – The thermal cracking (Delayed cocking units) phase of the process generates effluent with coke particules. It could be the same issues in case of Steam cracking (Ethane/Ethylene process)
2 – The decoking phase of the process generates coke particules which can drop into the valve body during the opening-closing phase and damage the sealing system.
Guichon Valves proposes a valve design with sliding gate and sleeve combination or double discs and substitution rings to reduce ingress of coke particules. The third generation of Guichon Valves’s transfer Line Valves, TLV0 (Transfer Line Valve), provides reliable, long lasting tight shut-off.

Posted in: FAQ - Ethylene cracking