Temperature and Pressure Control Valves | Boiler Supplies Steam Pressure Reducing & Regulating Valves Watson McDaniel O-Series Direct-Operated Pressure Regulating Valve
The Watson McDaniel O-Series direct-operated pressure regulators with heavy duty cast iron bodies and internal strainer are suitable for a wide range of applications in the low-to-moderate flow range.
This style of regulator does not require an external sensing line. Set pressure is controlled by turning an adjustment screw with lock nut that increases or decreases spring force above the diaphragm. Several spring ranges are available, depending upon the downstream pressure that needs to be maintained. O-Series contains hardened stainless steel seat and disc for extended service life. Phosphor Bronze Diaphragm specifically designed for Steam service is considered a preferred choice over Stainless Steel diaphragms which are prone to work-hardening and potential cracking. Viton diaphragms are specifically designed for water, air, gases and other liquid service and have a working temperature range up to 300˚F.
| Item # | Size |
Pressure Range (PSIG) |
Description | |
|---|---|---|---|---|
| O-11-NB | 3/8" | 3/8" Self Contained Pressure Regulator | Add to RFQ | |
| O-12-NB | 1/2" | 1/2" Self Contained Pressure Regulator | Add to RFQ | |
| O-13-NB | 3/4" | 3/4" Self Contained Pressure Regulator | Add to RFQ | |
| OHC-13-NB | *3/4" (HC) | 3/4" HC Self Contained Pressure Regulator | Add to RFQ | |
| O-14-NB | 1" | 1" Self Contained Pressure Regulator | Add to RFQ | |
| O-15-NB | 1-1/4" | 1-1/4" Self Contained Pressure Regulator | Add to RFQ | |
| O-16-NB | 1-1/2" | 1-1/2" Self Contained Pressure Regulator | Add to RFQ | |
| O-17-NB | 2" | 2" Self Contained Pressure Regulator | Add to RFQ |
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