For closed tank applications where the temperature does not fall below -35°F (-37°C) or exceed 250°F (121°C), the FTG13A-600R packing nut assembly is available. The maximum liquid pressure limit is 150 psig (1,034 kPa).
For applications where the temperature or liquid pressure exceeds these limits, specify the following when you order the control: a Style 4 element with an all-metal packing nut as an integral part of the control.
Figure 1. FTG13A-600R packing nut assembly