Bell & Gossett P81567F Series 1531 - Manual (Page 13)

Seal type Parameter Value
Flushed single seals 1,3,4 pH range limits pH 7–9
Liquid temperature range 0˚F to 250˚F (-18˚C to 121˚C)
Packing 2 pH range pH 7–9
Liquid temperature range 0˚F to 200˚F (-18˚C to 93˚C)
Table notes
1. An external flush is required on low pressure systems that contain a high
concentration of abrasives.
2. Use packing on open or closed systems which require a large amount of makeup
water, as well as systems that are subjected to a wide variety of chemical conditions
and solids buildup.
3. For operating temperatures above 250°F, a cooled flush is required and is
recommended for temperatures above 225°F for optimum seal life. On closed
systems, cooling is accomplished by inserting a small heat exchanger in the flush line
to cool the seal flushing fluid.
4. Flush-line filters and sediment separators are available on request.
5. Use a standard seal on closed or open systems that are relatively free of dirt and/or
other abrasive particles.
Product Description
Series 1531 Installation, Operation, and Maintenance Manual 11