Direct-Acting Temperature Regulator - OB-30 & OB-31 | Armstrong | Americas

Direct-Acting Temperature Regulator – OB-30 & OB-31

Direct-Acting Temperature Regulator – OB-30 & OB-31

Product Specifications

Model OB-30 (Heating) OB-31 (Cooling)
Fluid Water, Steam, and
Non-Corrosive gases
Water, Steam, and
Non-Corrosive gases
Connection Type NPT, BSPT NPT, BSPT
Maximum Allowable Pressure 150 psig
(10 bar)
250 psig
(17 bar)
Maximum Allowable Temperature 366°F
(185°C)
366°F
(185°C)
Body Material Bronze
ASTM B584
Bronze
ASTM B584
Maximum Operating Pressure 150 psig
(10 bar)
250 psig
(17 bar)
Connection Size 1/2″ (15 mm)
3/4″ (20 mm)
1″ (25 mm)
1/2″ (15 mm)
3/4″ (20 mm)
1″ (25 mm)

 

Direct-Acting Temperature Regulator – OB-30 & OB-31

The Armstrong OB-30 and OB-31 are direct-acting temperature regulators that require no external source for operation. Simple and compact, the units are suitable for a wide variety of heating/cooling applications. Installing, adjusting or maintaining the OB-30 and OB-31 is quick and easy, because interchangeable capillaries mount in any position and disconnect by simply loosening the union nut. No stem packing, so there’s no leakage. Single composition seat for tight shutoff. The OB-30 and OB-31 come in .5″, .75″ or 1″ (15–25 mm) sizes and is available with a choice of five temperature ranges and three capillary lengths.

Certifications

  • NIBR