When you order, specify the basic model number, then specify the following details:
- Range
- Between-stage differential, for nonadjustable models only
- Capillary length: the standard capillary length is 6 ft
- Type of bulb
- Method of mounting
- Type of adjustment. If you require a knob shaft, specify the length, flat thickness, and flat length. See Figure 1 and Figure 3.
- Packing nut or bulb well, if required