Product Overview

HydroMixer™ 166 series

Thermostatic fixed temperature mixing unit for low temperature heating systems. Factory pre-assembled configurations selectable

either with upward flow and discharge (pump mounting) on right side or left side, and field reversible. Union connections to the

secondary supply and return header (bottom connections) 1 1/2 “ male straight threads. Union connections to the system supply

and return circuit (top connections) 1 1/4” male straight threads. Center distance 5” (125 mm) between connections. Adjustable

temperature range 80 – 125°F (25 – 50°C). Maximum working pressure 145 psi (10 bar). Complete with Grundfos three-

speed pump UPS 15-58 or variable-speed pump Alpha 25-55U, power supply 115 V 50/60 Hz, protection class F. Dual-scale

temperature gauges 32 – 176°F (0 – 80°C). Brass secondary circuit shut-off ball valves. Connection pipe in steel. Check valve

with brass body, shutter PPAG40. With pre-formed insulation shell in EPP. Provide with 1” sweat or NPT union inlet and outlet

fittings, code NA16 series.

Code 519006

Adjustable differential pressure by-pass valve. Brass body. Connections 1“ male x 1” male straight threads. Stainless steel spring.

Pressure range from 0.3 – 4.3 psi (2 – 30 kPa) . Maximum working pressure 145 psi (10 bar). Maximum working temperature

212°F (100° C).

Code 165001

Mounting bracket in stainless steel.

SPECIFICATION SUMMARY

We reserve the right to change our products and their relevant technical data, contained in this publication, at any time and without prior notice.

Caleffi North America, Inc.

3883 W. Milwaukee Road

Milwaukee, WI 53208

Tel: 414-238-2360 · Fax: 414-238-2366

sales@caleffi.com · www.caleffi.us