Brochure

ManualsBrandsCaleffi ManualsHeating Supplies1" NPT Three-Way Motorized Ball Zone Valve

01131/07 NA

Motorized ball valves with 3-wire

control

6442 - 6443 series

Function

Zone valves are used to automatically shut-off the flow, redirect or

modulate hot and chilled water in hydronic heating and air

conditioning systems.

The motorized three-way diverting / mixing valves permits two

position diverting or three-way mixing with 3-wire floating outdoor

reset controller for injection mixing.

The motorized three-way bypass valves permits a system to

operate with a continuous flow regardless if the zone valve is in the

open or in the by-pass position.

The high flow and high close-off performance characteristics of

these zone valves, combined with the compact size, makes them

particularly suitable to fit inside baseboard or directly in fan coils

units.

Motorized ball valves series 644 are used in all types of systems

because of the following characteristics:

• Zero leakage across the valve

• Quick opening and closing valve operation

• Operates at very high differential pressures

• Low pressure drop through the valve

• Union connections for simple installs and removals

Patent Pending Number ME2005A001282

Product range

Series 6442 Zone valve 2-way with 24V actuator 3-wire control and auxiliary micro-switch 1/2”, 3/4”, 1” union sweat or NPT

Series 6443.. 3BY Zone valve 3-way by-pass with 24V actuator 3-wire control and auxiliary micro-switch 1/2”, 3/4”, 1” union sweat or NPT

Series 6443.. Zone valve 3-way diverting with 24V actuator 3 wire control and auxiliary micro-switch 1/2”, 3/4”, 1” union sweat or NPT

CALE FFI

cert. nϒ 0003

ISO 9001

Technical specifications

Valve body

Connections: 1/2”- 3/4” - 1” sweat or NPT

Materials: - body brass

- ball chrome plated brass

- ball seal PTFE with EPDM O-Ring

- stem seal two EPDM O-Rings

Medium: water, glycol solutions

Max percentage of glycol: 50%

Max working pressure: 150 psi (10 bar)

Temperature range: 20–230°F (-5–110°C)

Max pressure differential: 150 psi (10 bar)

Actuator

Materials: polycarbonate

Synchro motor: 24 VAC (± 10%) - 50/60 Hz

Power requirements: 4 VA

Micro-switch: 5 A

Time to rotate 90°: 40 s

Ambient temperature range: 0–55°C

Dynamic starting torque: 70 in·lb (8 N·m)

Wire lead length: 40 in. (1 m)

Temperature range: 32–130°F (0–55°C)

Summary of content (8 pages)

PAGE 1
Motorized ball valves with 3-wire control 6442 - 6443 series CALEFFI cert. nϒ 0003 ISO 9001 01131/07 NA Function Zone valves are used to automatically shut-off the flow, redirect or modulate hot and chilled water in hydronic heating and air conditioning systems. The motorized three-way diverting / mixing valves permits two position diverting or three-way mixing with 3-wire floating outdoor reset controller for injection mixing.
PAGE 2
Dimensions 6442 series 2-way E E G D A’ F A’ A A F D B C Code 644249A 644259A 644269A 644240A 644250A 644260A B C A 1/2” 3/4” 1” 1/2” swt 3/4” swt 1” swt B 2 2 2 2 2 2 3/8” 3/8” 3/8” 3/8” 3/8” 3/8” C 4 5/8” 4 5/8” 5 1/4” 3 7/8” 4 7/16” 5 9/16” D 2 2 2 2 2 2 H E 3/8” 3 3 3 3 3 3 3/8” 3/8” 3/8” 3/8” 3/8” F 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” E 3 3 3 3 3 3 G 7/16” 7/16” 7/16” 7/16” 7/16” 7/16” 2 2 2 2 2 2 3/16” 3/16” 3/16” 3/16” 3/16” 3/16” E Weight (lb) 2.14 2.14 2.20 2.00 2.10 2.
PAGE 3
Construction details Directions of flow and position indicator Seals The valves are equipped with unions with a flat seat with EPDM O-Ring seal. Removing the actuator reveals the slot on the top of the control stem on which acts the pin of the actuator: - it permits opening/closing the valve manually with a screwdriver. - its position shows the direction of flow according to the position of the ball, which is especially helpful when testing or checking the system.
PAGE 4
Hydraulic characteristics Two-way zone valve 6442 series, sizes 1/2”, 3/4” and 1” Three-way zone valve with by-pass series 6443.. 3BY on “by-pass” operation, sizes 1/2”, 3/4”, 1” p (psi) 13.0 Cv (11.2 kv) (kPa) 5 p (psi) 2 Cv (1.8 kv) 30 4 3 (kPa) 5 30 4 3 20 20 CALEFFI 2 2 10 10 1 1 5 0.5 0.4 0.3 5 0.5 3 0.4 0.3 2 0.2 1 0.1 0.1 0,5 0.04 0.03 0,5 0.05 0,3 0.04 0.03 0,2 0.02 Three-way zone valve with by-pass series 6443..
PAGE 5
I L E F F I C A L E F F A L E F F I C A L E F F L N LOAD M CLOSE OPEN LOAD I C 2. The three-way valves with by-pass must be installed on the flow pipe. Max 0,8 A 1. The two-way valve can be installed either on the flow pipe or on the return pipe. C 6. To prevent the actuator from reaching high temperatures, where the zone valve is installed there should be constant ventilation. A Installation Wiring diagrams 1. Connection diagram for room thermostat (RT) and electric supply.
PAGE 6
Application diagrams In systems with zone control, action is taken to automatically cut off the circuits serving the heat exchanger terminal emitters, according to the temperature reached in the room. This circuit closing can however cause changes in pressure and flow rate throughout the system so it is essential to make sure these changes are kept under control within acceptable limits.
PAGE 7
Solar heating system with three-way diverter valve If the water from the storage tank is at a lower temperature than as required (and set on the thermostat) the diverter valve sends the water to the water heater. Otherwise, the valve sends the water to the mixer directly.
PAGE 8
SPECIFICATION SUMMARIES 6442 series Motorized two-way ball zone valve with three-wire control. 1/2” (from 1/2” to 1”) union sweat or NPT. Brass body. Chrome plated brass ball. Ball seal made of PTFE with O-Ring in EPDM. Control stem seal with double O-Ring in EPDM. Union seals with O-Ring in EPDM. Medium water and glycol solutions. Maximum percentage of glycol 50%. Maximum working pressure 145 psi (10 bar). Temperature range 20–230°F (-5–110 °C). Maximum working differential pressure 150 psi (10 bar).