Sensus 243-8 Model Commercial Lpg Pressure Regulator Low Pressure
Cut-Off Plus Internal Relief Valve
Sensus Brand Model 243-8 Natural Gas Regulator
243-8-6 Low Pressure Cut-Off with Internal Relief Valve
Introduction
Sensus 243-8 model has low-pressure cut-off (LPCO) is used to automatically shut off the gas when inlet
pressure is no longer large enough for the required flow. It is an
optional, extra safety device that is built into the 243 as an
integral part of this regulator.
During normal operation, the 243 provides its usual accurate
control over the pressure of the delivered gas. However, if a line
break or something else causes the regulator to open excessively as
it attempts to handle the flow demand, the cutoff closes and shuts
off the gas. This helps prevent a hazardous condition from
developing on the service side of the regulator.
As an added protection, the LPCO does not reset itself if inlet
pressure happens to return to normal. Instead, it must be manually
reset, thus helping to prevent a pressure malfunction from passing
unnoticed.
Internal construction and capacities are given on pages 3 and 4. Note that these regulators are also
available with an internal relief valve (IRV). References to the
term standard indicate non-IRV configurations.
Cut-off data is given in the curves on page 5. These show the relationship
between inlet pressure and flow for the various orifice sizes.
Bodies are cast iron (ASTM A126-Class B).Diaphragm cases are
die-cast aluminum alloy.
243 commercial regulators can be found in factories, foundries,
district regulator stations, commercial laundries and laundromats.
These versatile natural gas regulators are ideal for commercial use
such as apartments, restaurants, schools and hospitals. Their
design works well for all types of gas-fueled equipment, too. This
includes: boilers, burners, furnaces, ovens, heaters, kilns and
engines.
Benefits to you
- Installs and adjusts easily
- Allows for pressure factor measurement, pressure compensated
metering and fixed factor billing
243-8-1 Standard Regulator.
Orifice and Maximum Inlet Pressure
| Pressure | Size |
| 25 psi | 1” |
| 40 psi | 1” |
| 40 psi | 3/4” |
| 60 psi | 3/4” |
| 100 psi | 1/2” |
| 125 psi | 3/8” |
| 125 psi | 1/4” |
Regulator Spring Chart
| Outlet Pressure Ranges | Spring Color |
| 3.5” - 6.5” w.c/ 0.9-1.7kpa | Red-Black |
| 5.0” - 8.5” w.c/ 1.2-2.1kpa | Blue-Black |
| 6.0” - 14.0” w.c./1.5-3.5kpa | Green-Black |
| 12" to 28" w.c. | Green |
| 1 to 2 psi | Orange |
| 2 to 4¼ psi | Cadmium |
