500°F Seal Cooling Jacket
Extends maximum working temperature of the D51 up to 500°F or higher with an appropriate customer provided external cooling fluid source connected to the cooling jacket ports.

Self-Priming Option
The cover casing of the D51 and D61 can be replaced with a self-priming chamber to aid pump priming where lifting fluids from a sump or lower elevation is necessary. In these applications, the self-priming version lowers maintenance by helping to prevent the pump from running dry and extending the life of the pump seals.

Vertical Configuration
The D51 pumps are also available in a vertical flange mount configuration for tank mounted designs and special applications.