Varec 2500, Инструкция по установке и эксплуатации

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2500 Automatic Tank Gauge
8 Installation and Operations Manual
Guidelines, Recommendations, and Options When
Preparing for Installation
Various installation options and accessories are available to suit the user installation
requirements. This section provides an overview and basic recommendations for elements of
a 2500 ATG installation.
It is paramount that the user monitor the quality of the installation to assure long-term,
accurate performance. All parts of the gauge head, tape, and float should move freely to
reduce wear and maintenance. If the quality is compromised, an inferior operation may result.
How a guide wire is anchored at the tank bottom and welding parts to or in the tank are major
considerations. These additional items are also critical to a successful installation and
operation of the 2500 ATG:
•
Accurate hand gauging referenced to the tank bench mark
•
Clean interior of the gauge piping
•
No kinks in the tape or tape cable
•
No noticeable binding friction in the mechanism
•
Installation cleanliness
•
True vertical gauge piping
•
Location of float away from inlet pipes of mixers
Note Varec service contracts provide the user substantial savings for maintaining and
refurbishing the systems already in service.
Floating Roof Tank Installations
Warning Varec recommends that gauges be installed in a floatwell, rather than attaching
the tape directly to the tank roof.
The floatwell should contain a baffle to prevent the float from escaping while allowing
sufficient product movement to equalize the liquid level. No tape should be exposed outside
of the roof or pipework. If any section of the tape is currently exposed, it should be replaced
with a stainless steel, flexible cable. This will reduce measurement error due to wind drift. The
connector between the tape and cable should not run over a conduit elbow (or pulley).
Note An internal floating roof is often referred to as a “Pan”, e.g. a cone roof tank with a
pan and floatwell.
Varec offers a kit with a weight that sits on top of the floating roof rather than attaching
directly to the roof. This protects the tape or cable from breaking.
Warning Floating roof must be reinforced below the weight.
Guide Wires and Anchors
Note Varec recommends guide wire installations or stilling well installations where pos-
sible.