NCD Valve Trays
The NCD valve is a 2 piece valve, where a 4-legged hold down cage (securely attached to the tray deck) contains a movable valve disc.
These valves are used for general applications like the STD valve but with the following advantages:
- longer lasting in service
- less risk of sticking shut or open
- suitable for fouling services
- increased flexibility due to less liquid weeping
Alternate rows of light (1.5mm thick) and heavy (2.0mm thick) discs can be used to maximise turndown.
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LCD Valve Trays
These are NCD valves with a very light disc (1.2mm thick) to reduce (dry) pressure drop.
VCD Valve Trays
These are NCD valves with a very light disc (1.2mm thick) plus a venturi hole to minimise (dry) pressure drop.