Itron

CL838 Twin Parallel Flow Dual Pilot-Loaded Regulator: Advanced Pressure Control

The CL838 regulator incorporates the proven foundation of the standard B838 service regulator while featuring a crucial design modification. Unlike the standard model, the CL838’s main springs are engineered to close rather than open the valve, creating a reverse-action operation that enhances control precision in pilot-loaded applications.

The main regulator assembly remains consistent across both CL838-1 and CL838-2 configurations. The primary distinction between these models lies in the pilot regulators’ outlet pressure capabilities. Your specific application requirements will determine which model best suits your needs based on the desired downstream pressure range.

When selecting between the CL838-1 and CL838-2, our technical team can help evaluate your system parameters to ensure you receive the optimal configuration for your pressure regulation requirements.

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Features & Benefits

CL838 Regulator Benefits

The CL838 regulator is a single valve body regulator with large (12 1/16" diaphragm) twin diaphragm cases, pilot loaded to ensure a high degree of accuracy during fixed-factor measurement. These regulators are ideal for service, commercial, industrial and distribution regulation applications when installed in compliance with D.O.T. regulations.
The CL838 is available in the following models:

  • CL838-1 - The CL838-1 has maximum inlet pressure of 150 PSIG and an outlet pressure range 6" W.C. to 5 PSIG with the orifice size of 3/8" through 1 3/8"
  • CL838-2 - The CL838-2 has maximum inlet pressure of 150 PSIG and an outlet pressure range 1 PSIG to 30 PSIG with the orifice size of 3/8" through 1 3/8"
  • CL838D-1 - The CL838D-1 (Downstream Control) has a maximum inlet pressure of 150 PSIG and an outlet pressure range 6" W.C. to 5 PSIG with closed throat and equipped for downstream control tap. This unit is used when it is desirable to control the regulator from a downstream sensing point other than the regulator valve body outlet side. All capacity curves are the same except no boost is experienced at the control point. Orifice sizes 3/8" through 1 3/8"
  • CL838D-2 - The CL838D-2 has a maximum inlet pressure of 150 PSIG and an outlet pressure range of 1 PSIG to 30 PSIG. All other facets of the CL838D-2 are the same as the CL838D-1 regulator
  • CL838M-1 - The CL838M-1 is a regulator for monitor installation with closed throat and o-ring seal on the valve stem at the throat to assure positive downstream control when installing ahead of the operating regulator. This unit provides an operating safety device that assumes control over the operating regulator when failure is sensed by the monitor control line. The monitor regulator is set to take over control from the operating regulator with only a slight increase in outlet pressure. It can be equipped with an orifice size ranging from 3/8" through 1 3/8" and outlet pressure ranges from 6" W.C. to 5 PSIG and inlet pressures of 150 PSIG maximum
  • CL838M-2 - All facets of this regulator are the same as the CL838M-1 except the range of the outlet pressures, which are from 1 PSIG to 30 PSIG

 

Connection Sizes 2"X2" - 2"X4"
Max. Flow Range 100,000 SCFH

Specifications

CL838 Brochure