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Smith 100278231 Coupler is a precision-engineered pump coupler replacement designed for high-performance hydronic and domestic hot water systems
specific high-pressure versions are typically required for transcritical CO2 applications
and 'FAN' for the condenser fan lead
Complete internal rebuild components including stem
Automatic Reset Logic: Automatically closes the circuit at 90°F
Belimo Z2075QPT-G Valve 321142-301 Smith 100278231 Coupler is aThe Belimo Z2075QPT G is a 3 4 inch NPT pressure independent zone valve (PIZV) engineered for precise flow control in demanding hydronic systems. Featuring a stainless steel trim and a 5. 9 GPM flow capacity, this valve maintains a constant flow rate regardless of pressure fluctuations within the system, effectively eliminating the need for separate balancing valves. The integral pressure regulator compensates for differential pressure changes,
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