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which protects the scrolls and bearings from damage during the next start sequence
Built with a heavy-duty cast iron body (ASTM A126 Class B)
Common Questions: What causes a Weil McLain boiler to lockout on ignition
Contractor Grade: Streamlined installation process reduces labor time during annual maintenance or emergency repairs
the SPDT (Single Pole Double Throw) action allows the device to be wired to make or break a circuit on temperature rise
Spirax-Sarco 0190192 Vacuum Breaker Refrigerant which protects the scrolls andFor steam and liquid system protection, the Spirax Sarco 0190192 (Model VB21) is the industry standard for preventing vacuum formation in heat exchangers, jacketed kettles, and steam coils. As a veteran technician knows, a vacuum in these systems can lead to catastrophic coil collapse, water hammer, or stalled condensate drainage. This 1 2" NPT vacuum breaker is engineered with a high grade 303 stainless steel body and a precision ground stainless