Itron

CL31 Precision Regulator: Reliable Performance with Economic Advantages

The CL31 regulator delivers significant cost benefits throughout its service life. Users experience lower initial purchase costs, simplified installation requirements, and reduced long-term maintenance expenses compared to similar capacity units.

What sets the ROOTS CL31 (previously Itron) apart is its advanced valve design, which prevents performance issues common in other regulators. The innovative valve structure minimizes both pressure spikes and rapid pressure drops when demand fluctuates, maintaining stability even during challenging on-off cycling operations.

This regulator is specifically engineered for applications requiring exceptional pressure regulation accuracy, such as:

  • Utility fixed-factor metering systems handling flows up to 4000 SCFH
  • Industrial heating equipment that demands consistent high burner pressures (1 PSIG to 20 PSIG)

The CL31’s combination of economic benefits and technical performance makes it the ideal choice for gas system operators who require both precision control and long-term value.

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Features & Benefits

CL31 Regulator Features

  • Controlled size pilot breather orifice eliminates pulsation and provides normal breathing operations
  • "Stop stem" in pilot ensures token internal relief valve operation
  • No special start-up procedures

The versions available with the CL31 are:

  • CL31N - The CL31N is a constant pressure loaded regulator that utilizes a pilot with no internal relief (N). This regulator can be used where psig to psig regulation is required, with no internal relief
  • CL31R - The CL31R is a constant pressure loaded regulator equipped with a pilot internal relief valve. The pilot relief valve is not designed for "full capacity" relief, but rather to limit the loading chamber pressure to a safe value in the event of a failure
  • CL31IMN - The CL31IMN is a constant pressure loaded regulator featuring Internal Monitoring (IM) operation with no pilot internal relief (N). It provides the important added advantage of a second, bubble-tight lock-up seat in series with the primary seat. If the primary seat fails to close or control the gas flow, the Internal Monitor seat assumes control of the downstream gas pressure
  • CL31IMR - The CL31IMR provides the same features as the 'IMN' model, but with token pilot relief valve backup of the monitor orifice if both the primary seat and monitor seat fail simultaneously
  • CL31IMRV - Operation is identical to the 'IMR' except that at no flow position of the monitor orifice a small volume of gas is vented through the relief valve to serve as a signal that the regulator is on monitor operation and the primary seat has failed. No gas is vented until the gas load is less than the volume going through the orifice vent hole and the regulator is on monitor operation

Connection Sizes ¾" - 1¼"
Max. Flow Range 4,000 SCFH

Specifications

CL31 Spec Sheet