Brochure

119
Selection Guides
Hoffman Specialty
®
Selection Guidelines
Series 315 PNT Pneumatic Temperature Pilot –
For Shop Quality Air
1. Determine the process temperature of the fluid whose
temperature is being controlled.
2. Determine bulb material compatible with process fluid.
3. Use Model 315 PNT Pneumatic Temperature Pilot
Ordering Information to select model (based on
temperature range and bulb material as determined
above).
4. (Optional) Use the Well Ordering Information Chart to:
(a) Select a model number (based on bulb material).
(b) Determine the part number (based on the model
number).
5. Determine the reduced steam outlet pressure to be
maintained downstream of main valve.
6. Determine the air loading pressure available from the
Air PRV or Pneumatic Temperature Pilot.
7. Use the Air Loading Data Graph to select a model
number that meets the requirements of the outlet
steam pressure and available air loading pressure as
determined above.
8.
Use the Air Pilot Ordering Information Chart to determine
the part number (based on the model number).
9. Use the Air PRV Regulator Ordering Information Chart
to determine the part number.
Series 240 PNT Pneumatic Temperature Control Pilot –
For Control Quality Air
1. Use Model 240 PNT Pneumatic Temperature Pilot
Ordering Information to determine part number.
2. Determine the reduced steam outlet pressure to be
maintained downstream of main valve.
3. Determine the air loading pressure available from the
Air PRV or Pneumatic Temperature Pilot.
4. Use the Air Loading Data Graph to select a model
number that meets the requirements of the outlet
steam pressure and available air loading pressure as
determined above.
5. Use the Air Pilot Ordering Information Chart to
determine the part number (based on the model
number).
6. Use the Air PRV Regulator Ordering Information Chart
to determine the part number.
How to Select Series 2000 Pilots (continued)
Electro-Pneumatic Transducer
1. Use the Electro-Pneumatic Transducer Ordering
Information Chart to determine the part number.
2. Use the Air Loading Graph to select a model number
that meets your desired outlet steam pressure (based
on your available air loading pressure).
3. Use the Air PRV Regulator Ordering Information Chart
to determine the part number.
Solenoid Pilots for on/off control
1. Determine which operating mode, "Normally Open" or
"Normally Closed", is better suited for your application
by reading the descriptive information.
2. Use the Ordering Information Chart to:
(a) Select a model number (based on the operating
mode and the inlet steam pressure operating range).
(b) Determine the part number (based on the model
number).
Hardware Kits
1. Use the Hardware Kit Ordering Information Chart to:
(a) Select a kit (based on the main valve size and the
type of pilot(s) used.
(b) Determine the part number (based on the kit
selected).