The sieve tray as classic transfer element is the most cost competitive variation of trays. The operating range of these sieve perforated trays is less than that of valve trays due to the higher leakage rate.

Due to the wide operating range handled, the valve trays are now the most commonly used type of mass transfer trays. This tray differentiates from the others by it's ability to handle high capacities at excellent mass transfer efficiencies over a wide operating range.

The different valves optional in combination of light and heavy units allow the optimated layout of this trays.

Depending on the application, a specific type and size of valve is selected:

V1: Standard valve with integrated legs. Tray floor orifice is sharp edged.
V4: Same basic design as the V1 valve. A venturi-shaped orifice in the tray deck is   
       used to reduce pressure drop.
V6: Bell shaped valve seated on venturi-shaped orifice above the tray deck.
V0: Fixed valve unit with defined openings.
A3: Flush opening in the tray deck.
A4: Cage valve with venturi-shaped orifice in the tray deck.

The conventional bubble cap tray is well-proven in applications having:

very large loading rates

very low liquid loadings

very low gas loadings

constant liquid hold up

low leckage rates

There are different types of tray hardware. Rauschert can supply these elements in all commonly needed materials:

manway hardware

wedge clamp

support ring bolting plate clamp with welded bolt

support ring bolting plate clamp with integral T-bolt