Overview

The Johnston PFTA Series is a skid-mounted packaged boiler complete with boiler, burner, and all required controls and safety equipment. This PFTA is a four-pass wet-back firetube boiler, constructed to ASME Section I code and utilizes 5 sq ft of surface area per boiler horsepower.

This boiler was purchased by Powerhouse from a customer who was replacing these boilers with new ones. This boiler has since been fully reconditioned and tested for a new customer. Our reconditioning process verifies that this boiler is 100% functional and ready for many more years of service which is why we offer a 1-yr warranty that matches or exceeds the original factory warranty.

Specs

  • BrandJohnston
  • Boiler TypeFiretube
  • Output Capacity3,019 - 12,075 PPH
  • Max Pressure80 - 150 PSIG
  • Fuel(s)Natural Gas
  • ServiceSaturated Steam
  • Emission Rating110 ppm

Technical Specifications

General Design

  • Manufacturer (OEM)Johnston
  • Year1992
  • Serial No.8910-01
  • National Board No.8429
  • CRN No.-
  • ModelPFTA350-4G-150S
  • ASME CodeSect I - High Pressure Steam
  • TypeScotch Marine
  • DesignFour-Pass Wet Back Firetube
  • MountingSaddles & Skid-Mounted
  • InternalCorrugated Furnace & Straight Tubes

Capacities & Inputs

  • Output Capacity12,075 LB/HR
  • Horsepower350 BHP
  • Design Pressure (MAWP)150 PSIG
  • Operating Range80 -135 PSIG
  • Heating Surface1,750 FT²
  • Max. Fuel InputNG: 14,650,000 BTU/HR
  • Standard FuelsNatural Gas
  • Additional Fuels#2 & #6 Fuel Oil
  • Input Gas Pressure MAX: 5 PSIG
  • Turndown RatiosNG: 3.3:1
  • Emission Rating (NOX)NG: 110 PPM

Burner and Electrical

  • Burner Manufacturer (OEM)Johnston
  • ModelSeries A
  • TypeFull Modulation
  • Flue Gas Recirculation (FGR)No
  • Electric460V/4PH/60Hz
  • Atomization-
  • Control TypeSingle-Point Positioning
  • Boiler Control System-
  • Burner Management SystemHoneywell RM7800L
  • Flame SafeguardIR Scanner
  • Blow Motor10 HP
  • Burner InstalledYes
  • Pilot TypeNG
  • Instrument AirNone
  • Air CompressorNot Required

Dimensions and Weights

  • Overall Length20' 5"
  • Overall Height9' 8"
  • Overall Width8' 5"
  • Shipping Weight27,500 LBS
  • Operating Weight49,750 LBS
  • Boiler Outlet6" 300# FLG
  • Exhaust Outlet20" ø ID

Technical Overview PDF

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