Series 629 wet/wet differential pressure transmitter is available with an optional three-way valve. This optional integral valve manifold simplifies installation by allowing the installer to isolate or combine the pressures on the high- and low-pressure ports, says the manufacturer. The valve manifold permits maintenance to be performed on the transmitter without interrupting the process. Bleed ports are provided on the valve manifold to alleviate possible trapped air in the lines, the company states. The three-way valve manifold is completely assembled to the 629 pressure transmitter when the two are ordered together.

Dwyer Instruments Inc., P.O. Box 373, Michigan City, IN 46361; 800-872-9141 or 219-879-8000; 219-872-9057 (fax);;

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