EG-65 Series Block Section Assembly, Steam, 209,000 BTU

Weil-McLain 321811135 – Replacement Block Section for EG-65 Steam Boiler

The Weil-McLain 321811135 is a factory-authorized cast iron section used in the EG-65 steam boiler series. Designed for atmospheric gas-fired systems, this section is part of the pressure-retaining heat exchanger block and is manufactured to meet the dimensional, hydraulic, and thermal requirements of the EG-65 model.

???? Technical Features and Application Boiler Compatibility: For use with Weil-McLain EG-65 steam boilers BTU Output (assembled): EG-65 boiler rated at 209,000 BTU/hr DOE heating capacity Construction: High-grade cast iron with machined mating surfaces for secure push nipple sealing Installation Type: Field-assembled sectional block using tie rods, push nipples, and compression gaskets Heat Transfer Medium: Low-pressure steam only (not for hot water systems) This section is designed for direct replacement in damaged or compromised EG-65 heat exchanger blocks and should be used with OEM hardware to maintain UL and ASME design compliance. ⚙️ Performance Considerations Flue Gas Design: Passages molded into the casting support efficient combustion gas flow across the entire block Sealing System: Requires metal push nipples and pressure-rated gaskets for leak-free operation Rated Pressure: ASME Section IV construction, certified for 15 PSI steam service Assembly Note: A full EG-65 block consists of 8 sections ???? For Professional Installation Replacing cast iron sections in steam boilers requires disassembly and reassembly of the entire block under controlled conditions. This process includes: Correct sequencing and torque of tie rods Alignment of flueways and ports Pressure testing prior to final jacket installation Compliance with local mechanical codes and manufacturer specifications Use of hydraulic presses or jack assemblies is recommended for safe draw-up during installation. ???? Key Specifications Attribute Details Model Number 321811135 Boiler Series EG-65 Boiler Output Rating 209,000 BTU/hr (DOE) Section Material Cast Iron Section Count (typical) 8 sections per full EG-65 assembly System Type Steam (not hot water) Pressure Rating 15 PSI (ASME Section IV – Steam) ⚠️ Contractor Notes This listing is for one individual replacement section Not compatible with other EG/PEG series boiler models Tie rods, nipples, insulation, jackets, and controls sold separately Always follow Weil-McLain service manuals when rebuilding boiler blocks