Product Overview

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

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 valve permits two position

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

controller for injection mixing.

The motorized three-way bypass valve 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 coil units.

The 6442 and 6443 series motor drives for 40 seconds. Power is

then dropped by an internal switch. Power is required to drive in both

directions. These valves 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

• Loss of power stays in last position (open, closed or mid-stroke)

• Low pressure drop through the valve

• Union connections for simple installation and removal

The 6442 and 6443 series is available with conventional sweat or NPT

male union connections. Also available for size 3/4”, the Presscon™

copper tail-piece with union nut makes installation and maintenance

fast, easy and efficient. Special slots in the EPDM O-ring allows fluid to

leak during system testing if unpressed and provide a perfect leak proof

seal when completely pressed.

Product range

6442 series Zone valve 2-way with 24V 3-wire control with micro-switch......connections ½”, ¾”, & 1” sweat, NPT male and ¾” press union

6443.. 3BY series Zone valve 3-way by-pass with 24V 3-wire with micro-switch.....connections ½”, ¾”, & 1” sweat, NPT male and ¾” press union

6443 series Zone valve 3-way diverting with 24V 3 wire with micro-switch.....connections ½”, ¾”, & 1” sweat, NPT male and ¾” press union

644004 Zone valve actuator, 24V 3-wire control with auxiliary micro-switch

Technical specifications

Valve body

Materials

Body: brass

Ball: chrome plated brass

Ball seal: PTFE with EPDM O-Rings

Stem seal: two EPDM O-Rings

Press fittings: Copper

Performance

Suitable fluids: 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)

Connections

Main connections: ½”, ¾”, & 1” sweat or NPT with unions

¾” press with unions

Lay length (press connection): 3 ¼”

Actuator

Materials

Protective shell: self-extinguishing polycarbonate

Color: gray RAL 9002

Performance

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

Power consumption: 4 VA

Protection class: IP 44 (vertical control stem)

IP 40 (horizontal control stem)

Starting (inrush) current: 170 mA

Holding current: 0 mA

Auxiliary micro-switch contact rating: 5 A (24V)

Time to rotate 90°, both directions: 40 s

Ambient temperature range: 32 – 130°F (0–55°C)

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

Wire lead length: 36 in. (100 cm)

Replaces 01131/13 NA

CALEFFI

01131/14 NA

ACCREDITED

ISO 9001 No. 0003

ISO 9001 FM 21654

Summary of content (8 pages)

PAGE 1
Motorized ball valves with 3-wire control CALEFFI 6442 - 6443 series 01131/14 NA ACCREDITED ISO 9001 FM 21654 ISO 9001 No. 0003 Replaces 01131/13 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 valve permits two position diverting or three-way mixing with 3-wire floating outdoor reset controller for injection mixing.
PAGE 2
Dimensions E E A A A A B B C Code 644249A 644256A 644259A 644269A 644240A 644250A 644260A H C A B C D E F G H ½” swt ¾” press ¾”swt 1” swt ½”NPT ¾”NPT 1”NPT 2 3/8” 2 3/8” 2 3/8” 2 3/8” 2 3/8” 2 3/8” 2 3/8” 3 7/8” 4 3/4” 4 7/16” 5 9/16” 4 5/8” 4 5/8” 5 1/4” 2 3/8” 2 3/8” 2 3/8” 2 3/8” 2 3/8” 2 3/8” 2 3/8” 3 3/4” 3 3/4” 3 3/4” 3 3/4” 3 3/4” 3 3/4” 3 3/4” 3 7/16” 3 7/16” 3 7/16” 3 7/16” 3 7/16” 3 7/16” 3 7/16” 2 3/16” 2 3/16” 2 3/16” 2 3/16” 2 3/16” 2 3/16” 2 3/16” 1 7/16” 1 7/16” 1 7/
PAGE 3
B A A B AB AB AB Construction details Valve body AB Directions of flow and position indicator Removing the actuator exposes the slot on the top of the control stem. This engages the actuator pin, permiting the opening/closing of the valve manually with a screwdriver. The position of the pin shows the direction of flow with relation 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 code 6443.. 3BY on “by-pass” operation, sizes 1/2”, 3/4”, 1” ∆p (psi) 13.0 Cv (11.2 Kv) 5 (kPa) ∆p (psi) 2.1 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 0.05 0.03 0,5 0.05 0,3 0.04 0.03 0,2 0.02 0,1 0,1 G (l/s) (gpm ) 20 1.10 10 .60 5 .25 2 .10 .05 1 0.5 50 3.
PAGE 5
Installation 1. The two-way valve can be installed either on the supply pipe or on the return pipe. I C A L E F F I C A L E F F I C A L E F F I C L E F F L N LOAD LOAD LOAD A LOAD LOAD LOAD AB LOAD LOAD LOAD LOAD LOAD B LOAD A B AB LOAD 4. The valve must be installed with the control stem in the horizontal or vertical position, never upside down. Horizontal stem Vertical stem 4b.
PAGE 6
N RT L Wiring diagrams 1. Connection diagram for room SPDT thermostat (RT) and electric supply. The illustrated connection permits opening and closing the valve according to the ambient thermostat signal. 3. Pump disconnection diagram when no zone is in operation. This diagram, using the auxiliary micro-switch, turns off the pump when the zone valve is closed. If the pump has an input current greater than 5 A (24 V), use an intermediate relay.
PAGE 7
Application diagrams In systems with zone control, the zone valve shuts off the circuits serving the heat exchanger terminal emitters when the temperature in the room reaches the desired temperature set point on the thermostat. Switching off this circuit can, however, cause changes in pressure and flow rate throughout the system. Therefore, it is essential to make sure these changes are kept under control within acceptable limits.
PAGE 8
SPECIFICATION SUMMARIES 6442 series Motorized two-way ball zone valve with three-wire power open/power closed control. Connections: 1/2” to 1” sweat with unions, 3/4” press with unions, or NPT with unions. Brass body. Full-port 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. Suitable fluids: water and glycol solutions. Maximum percentage of glycol 50%. Maximum working pressure 150 psi (10 bar).