Brochure

121
Selection Guides
Hoffman Specialty
®
Selection Guidelines
Steam
Supply
By-Pass
Y Strainer
F&T
Trap
10 Pipe
Diameters
Spring Pilot
Y Strainer
Y Strainer
Feedback
Line
Main Valve B
Main Valve A
Spring Pilot
Typical Parallel Pressure Regulator Station
Description: Used when the load
requirements widely vary. Main valve
“A” is sized based on 1/3 the total
load for normal operation. Main valve
“B” is sized based on 2/3 the total
load for peak duty operation.
Series 2000 Typical Applications (continued)
Steam
Supply
By-Pass
Feedback
Line
Relief
Valve
Y Strainer
10 Pipe
Diameters
Spring and Temperature Pilots
F&T
Trap
Y Strainer
Cold Water
Supply
Heat
Exchanger
Hot
Water
(Discharge)
Y Strainer
F&T
Trap
Vacuum
Breaker
Typical Series 2000 Combination Pressure-Temperature Pilot to Control Water Heater Exchanger
Description: Series 2000 Main Valve used to control
temperature of fluid from shell and tube heat exchanger. A
pressure pilot may also be added to limit the steam pressure in
the heat exchanger shell. A by-pass and a drip leg are
recommended for proper control
WARNING
To prevent burns, install the thermo bulb as
close as possible to the heat exchanger
discharge and provide system recirculation.
Failure to follow this warning can cause
serious burns, personal injury or death.
!