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2150EX Area Velocity Flow Module
Section 2 Preparation and Installation
2-31
the entire assembly and tightens it inside the pipe. The scissors
section contains a long bolt that increases the length of the
section as it is tightened.
The assembled scissors rings fit pipe diameters from 16" to 80".
Secure the unit in place by tightening the scissors mechanism
with a
5
/8" socket wrench or other suitable tool. Ring sections are
.040" thick half-hard 301 stainless steel sheet. All other parts are
also stainless steel, except for the plastic cable ties in the
hardware kit.
Each extension, 1, 2, 3, and 4, adds 9.0", 21.5", 31.5", or 41.5",
respectively, to the circumference of the ring. Used alone, the
base section fits a pipe that is approximately 16" to 19" in
diameter. The 9.0" (smallest) extensions can be used to take up or
remove slack, to bring the scissors mechanism into a position
where it can be effectively tightened.
Note
The hardware kit includes flat head bolts and nuts.Teledyne
Isco strongly recommends bolting the assembled scissors ring
together before installation, using the holes provided for that
purpose. Bolting the tongue sections together can greatly
increase safety and prevent the assembly from being torn
apart.
Do not overtighten the mechanism. It is designed to flex
somewhat to provide a positive lock, once moderately tightened.
For installations in larger channels and/or high flow, extensions
2, 3, and 4 have slots for attaching the ring to the channel wall
using appropriate anchoring hardware.
WARNING
Avoid prolonged use of excessive force when adjusting the
equipment. This can create hot surfaces from the friction
of screw or lever mechanisms, resulting in a potential
ignition hazard if surface temperatures exceed the
equipment’s 135°C rating.