TCS 700-30, Инструкция по установке, эксплуатации и обслуживанию

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System Recommendations (Continued)
Control Valves
Safety and isolation valves should be used throughout the metering system. In any pumping system where
there is one (1) pump and multiple flow meters, a digital or hydro-mechanical Rate-of-Flow control valve
must be used at each flow meter to prevent over speeding of the flow meters.
Best Plumbing Configuration
1). Flow meter must have secure mounting to a riser or foundation
2). The inlet and outlet piping must be securely supported, in a manner of not to allow pipe stress on flow
meter.
3). System should be designed to keep the flow meter full of liquid at all times.
4). System piping should have full 3” pipe diameter throughout the metering system to allow for minimal
pressure loss.
5). The pipe should be laid out as straight as possible to reduce pressure loss from flow restriction.
6). The meter and piping must be installed in such as way as to avoid accidental draining of the meter.
Meter inlet and outlet should be lower than the associated system plumbing (sump position).
7). It is not necessary for the air eliminator to be installed bolted directly to the meter. It can be installed
upstream from the meter. For effective operation of the air eliminator, it should be mounted between
the meter and any valves, tees or any other potential places where air may enter the system.
8). The metering system should include a means for calibration.
Protection From Debris
On new installations, care must be taken to protect the meter from damage during start-up. It is recom-
mended to put a strainer before the meter. Damage may result from the passage through the meter of dirt,
sand, welding slag or spatter, thread cuttings, rust, etc. The insertion of a spool (a flanged length of pipe
equal in length to the meter and accessories attached to the meter) in place of the meter until the system is
flushed, temporarily bypassing the plumbing around the meter, will also protect the meter from debris.
Once the system has run “clean” for a period of time the meter may be reinstalled or protective devices
removed.
Thermal Expansion
As with most liquids, they will expand and contract with temperature. In any system where there is a
chance for liquid to be captured between closed valves without relief, thermal expansion will likely occur
and create dangerously high pressures within the system. Care should be taken in designing the system in
which thermal shock may occur by implementing Pressure Relief Valves or Thermal Expansion Joints in
the system design.
When product is trapped within the system, the pressure will increase by 126 PSI (8.69 BAR) for every
one (1) temperature degree increase.