Subject

I buy epoxy resin in 500 lb drums (55 Gal) and hardner in 40 lb pails (5
gal).

I mix this 5:1 by weight, 4:1 by volume.

Designed and built a resin pumpng system consisting of a pair of 1/2"
NPT Oberdorfer bronze gear pumps that are coupled together in the proper
ratio by chain and sprockets.

The entire thing is then powered with a 1/2HP motor controlled by a foot
switch. driving a 7:1 belt reduction set of sheaves.

Use a drum heater in the winter to keep the resin viscosity under control.

Typical batch is about 1.5-2 quarts at a time.

Use a Jiffy mixer, powered by a drill motor, controlled by another foot
switch to do the mixing.

It has worked well for years now.

Lew