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the McDonnell & Miller 312200 is the official updated part number that replaces the discontinued 311100
Key Benefits Universal Compatibility: Drop-in replacement for Johnson Controls D-3153 and D-3070 series pneumatic actuators
High Pressure Rated: Engineered to maintain seal integrity under standard refrigeration vacuum and pressure ranges
manual installation
Common Questions What tube materials can I use with this adapter
McDonnell & Miller 313900 Gasket the McDonnell & Miller 312200The McDonnell & Miller 313900 is a high performance valve bracket gasket engineered specifically for technical reliability in boiler water feeder systems. This part, recognized by the model number 37 27, is the critical seal required for McDonnell & Miller 47 Series, 51 Series, 53 Series, and 3155 Series units. Designed as the direct replacement for the legacy 312800, this updated component ensures a pressurized, leak proof interface between the valve