|
Safety eye protection
and gloves are mandatory for this safety conscious producer.
The Exactrix 2KD filter is mounted on a turntable that allows the pump and
filter to always remain in alignment with the turning of the trailer
tanks.
The Exactrix filter is 100 mesh with 466 cu. in. of capacity. The pressure
drop is hardly measurable even at the highest flow rates. The element is
dual O-ring sealed to prevent filter channeling.
The rotating turntable was designed for Greg’s tool bar by Exactnx. Hose
life is extended and a straight pull breakaway release is assured if the
trailer tanks separate from the bar.
The positive displacement pump is capable of 120 gallons per minute. The
pump receives the liquid NH3 from the filter through a 4 inch swage type
nipple.
The Mid Tech 6100 controller is used to control the speed of the pump. The
pump is rated to 750 rpm but seldom turns faster than 550rpm. The 6.2 cu.
in. hydraulic motor uses up to 20 gallons per minute but normally uses 10
to 12 gallons per minute. Hydraulic hoses should be sized to 5/8 or 3/4
inch due to the 40 ft. length to the Mid-Tech three second hydraulic servo
control valve.
From the pump the NH3 high pressure liquid flow is directed to the mass
flow meter. Mass flowmeters measure the flow through a looped tube using
Coriolis effect or direction change that measures the actual mass flow or
weight of the material.
Mass flow meters are so accurate that the whole petroleum industry has
changed to mass flowmeters. Turbine flowmeters are considered obsolete
since the development of the Coriolis Mass Flowmeter over 20 years ago at
Boulder, Colorado. In fact Dow Chemical has over 10,000 Coriolis mass
flowmeters installed in one Michigan plant. Temperature has no bearing on
the mass flow reading since it weighs the material dynamically as mass.
The Coriolis mass flowmeter sends a signal, 350 Ibs. / min. @ 1000Hz, to
the Mid Tech Controller through an interface. The 6100 Mid Tech controller
compares ground speed and rate desired and sends the signal to the servo
valve to speed up or slow down the NH3 positive displacement pump.
|