Domestic Hot Water with Double Wall Tubes

Manufacturers: Advanced Steam Technology (877) 629-4843 or equal.

Model: XE-DW Ultra High Efficiency Water Heating Skid with Vertical Flooded Heat Exchanger. 
XE Control for "extra energy extraction" from the steam and condensate. 

Capacity: XX GPM of water, from 40F to 120F, 70 psig steam, 200F condensate out. 
Heat exchanger model BEU Vertical T-316 stainless steel shell, with vented double wall copper or cupro-nickel tubes & 150 psig ASME stamp. Inlet and outlet thermometers. 

For Electric Controls:
Modulating Electric Primary Control Valve: Siemens MVF series magnetic control valve for primary condensate control. 
Electronic control panel with basic MODBus controls. 
Double acting electric actuator on HP butterfly valve and control interface for secondary steam control.

For Pneumatic Controls
Modulating Electric Primary Control Valve: Fisher Little Scotty Series 24000 with pneumatic actuator for Primary condensate cotrol.
Powers "Accritem" controller
Self operating thermostatically controlled regulator on steam side as safety shut off.

Self standing steel framework. Pre-piped trap, strainer, and control valve on condensate side. Pre-piped thermometers and gages on water side.

Note: If a 3-way mixing or system anti-scald device limits building recirculation back to this unit, a pre-insulated, 150 psi ASME buffer tank and pump are required for unit recirculation. The tank shall have the same “gallonage” as the unit capacity. (60gpm = 60 gallon tank)

Items delivered separately (loose with skid):
Secondary steam control valve.
Pressure gauge with pigtail & isolation valve for the steam side 
P/T relief valve on the liquid side 
F&T steam trap as drip and air eliminator on steam inlet.