When Chemistry meets Flow Dynamics
descote is a leading manufacturer of advanced metal bellows-sealed valves for hazardous, toxic, and corrosive applications — from halogens to liquefied gases.
For over 50 years, descote has built strong expertise, serving industries worldwide with valves that are “fit for purpose,” field-proven, and reliable in the most demanding environments.
Designed on request by -, Field proven by -, the Industry
We design and manufacture:
• Manual valves
• Automatic ON/OFF valves
• Control valves
• Check valves
For safety-critical applications such as Toxic Inhalation Hazard (TIH) chemicals — in instrumentation, process, storage, transport, and nuclear sectors. Typical liquefied gas include:
Chlorine (Cl₂) – UN 1017
Hydrogen Fluoride (A-HF) – UN 1037
Ammonia (NH₃) – UN 1005
Sulphur Dioxide (SO₂) – UN 1079
Chloroethane (C₂H₅Cl) – UN 1037
Chloromethane (CH₃Cl) – UN 1063
Ethylene Oxide (C₂H₄O) – UN 1040
Bromomethane (CH₃Br) – UN 1062
Methyl Mercaptan (CH₃SH) – UN 1064
Hydrogen Cyanide (HCN) – UN 1051
When Quality must exceed the standards
Our valves meet or exceed the strictest standards:
• EuroChlor GEST 17/492 approved
• SIL 3 capable (IEC 61508)
• Qualified for fugitive emissions (ISO 15848-1)
Manufactured to EN, ASME, and all major international standards, our valves are available in a wide range of materials — from high-purity carbon steels and stainless steels to duplex alloys, Monel®, Inconel®, and Hastelloy® — to match every customer’s specific requirement.
Rethinking Globe Valves
Misconception: “A Globe Valve is just for control — not for shut-off.”
Reality:
✓ Globe Valve design delivers unmatched reliability
• No Entrapped Dead Zone (volume)
– No risk of thermal liquid expansion damage
• Closure by Pressing, Not Sliding
– No increase in torque over time
– No Jamming Friction Effects
– No Excessive Safety Factor Required
✓ Uncompromising on Fugitive Emissions
• First Barrier: Zero molecule emissions with high-alloy, multi-layer metal bellows, welded to stem and bonnet.
• Second Barrier: Packing in a reinforced high-alloy stuffing box.
✓ Scale deposit Problem Solved with Knife-Effect Design
• Cuts through scale deposits
• Maintains sharp contact between plug and seat
✓ Maintained Flow Performance
• Only a slightly reduced Cv — by design — to prevent liquid hammer and flow-Induced Vibration (FIV)