Armstrong Fluid Technology 810120-003 Coupler 318973-401 allowing for field-adjustable flow limiting

allowing for field-adjustable flow limiting

The kit provides the 1/4-inch Q

Smith commercial units starting from serial #4015

Can I use this for non-York equipment

it meets the EIA-456-A test standards

Armstrong Fluid Technology 810120-003 Coupler 318973-401 allowing for field-adjustable flow limitingThe Armstrong Fluid Technology 810120 003 Coupler is a precision engineered OEM replacement part designed for high performance hydronic systems. Specifically manufactured for Armstrong H 51 and H 52 circulator pumps, this four spring type coupler facilitates efficient power transfer between the motor and the bearing assembly. Featuring a 1 2 inch x 1 2 inch shaft size and a robust cast iron construction, it is built to withstand the rigorous demands