The Armstrong OB-30/31 is a direct-acting temperature regulator that requires no external source for operation. Simple and compact, the unit is suitable for a wide variety of heating/cooling applications. Installing, adjusting or maintaining the OB-30/31 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-30/31 comes in 1/2″, 3/4″ or 1″ (15–25 mm) sizes and is available with a choice of five temperature ranges and three capillary lengths.
The Armstrong OB-30/31 is a direct-acting
temperature regulator that requires no external source for operation.
Simple and compact, the unit is suitable for a wide variety of
heating/cooling applications. Installing, adjusting or maintaining the
OB-30/31 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-30/31 comes in 1/2″, 3/4″ or 1″ (15–25 mm) sizes and is
available with a choice of five temperature ranges and three capillary
lengths.
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No PDF available for download.
No PDF available for download.
No PDF available for download.
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