Optimized Flow: The 2-inch port size is designed to handle high-volume gas flow rates required by commercial heating applications

It provides additional headroom for electrical loads

or cracked metal during a heat exchanger inspection

This valve is built with a durable brass body and a stainless steel sensing bulb to withstand high-pressure environments and provide consistent refrigerant control

Designed with a flexible bellyband configuration

Dwyer Instruments A-350 Aspirator Bulb 340793-762 Optimized Flow: The 2-inch portIf you're out in the field running leak checking tests or validating pressure switch calibration, the Dwyer A 350 Aspirator Bulb is a staple in the technicians bag. This manual pump is engineered to provide a reliable source of positive pressure or vacuum for various HVAC test instruments. By simply connecting your 1 4 inch tubing to the barbed fitting, you can generate the required pressure with a single hand. For vacuum applications, such as pulling