Description
11
Manifold Block with Orifices and Pressure Tappings
The manifold block incorporates three orifices with associated differential pressure
sensors that can be used to measure flowrate The orifice associated with pressure
sensors P1 and P2 is 1.9mm diameter and suited to the low flow rates used in the
PCT41 Process Vessel Accessory. In use the tube from the peristaltic pump is
connected to the small quick release fitting at the front and the tube from the Process
Vessel is connected to the ferrule at the rear so that the fluid flowing to the reactor
vessel passes through the orifice.
The orifice associated with P3 is 3.7mm diameter and suited to the higher flowrates
used on PCT40. Fluid enters the orifice via a large quick release connector on the
front of the block and exits via a Guest push fitting at the rear. An additional large
quick release fitting (sealed) at the side of the block allows the flow from both
peristaltic pumps to be combined before it passes through the orifice. The
downstream connection from the orifice to P3 incorporates an in-line quick release
connector. In normal use this is connected to give differential pressure that is related
to flow. Alternatively the connection can be broken, with the sensor vented to
atmosphere to allow line pressure to be measured.
Process valves SOL 1, 2 and 3
A Normally Closed solenoid valve, SOL 1, is located in front of the Proportioning
Solenoid Valve for use in on/off control exercises.
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