Submittal Form
Submittal Data 02903 NA - Issue Date 04/2010
626 Series
Flow Switch
CA L E FF I
Application
The flow switch detects whether there is any flow in the piping and
opens or closes an electrical contact. It is normally used in heating,
air-conditioning, refrigeration, water treatment, additive pumping and
process systems in general. By means of the flow switch it is
possible: to control devices such as pumps, burners, compressors,
refrigerators, motorized valves; to turn on indicator and alarm
devices and regulate equipments for dosing water additives. In
heating systems, especially, the flow switch functions to switch the
burner off in case of a lack of heat transfer fluid circulation within the
water heater circuit. A lack of circulation would otherwise impair the
operation of the temperature-sensitive safety and protection devices.
Technical Data
Materials
Body: brass
Cover: self-extinguishing polycarbonate
Microswitch protection casing: self-extinguishing
polycarbonate
Bellows rod and bellows: stainless steel
Paddle (Blades) for pipes: stainless steel
Microswitch spring: stainless steel
O-Ring seals: EPDM
Performance
Medium: drinking water and glycol solutions
Max. percentage of glycol: 50%
Max. working pressure: 150 psi (10 bar)
Medium temperature range: -20-250°F (-30-
120°C)
Max. ambient temperature: 130°F (55°C)
Connection: 1” NPT male
Pipe adjustability: from 1” to 8”
Electric specifications
Voltage: 250 V
Electrical connection: 1/2” NPT female thread
Current: 15 (5) A
Protection class: NEMA Type 5 (IP 54)
Mark: CE, C-UL
Typical Specification
Furnish and install on the plans described herein, a Caleffi Flow
Switch as manufactured by Caleffi. Each switch must be designed
with a brass body, stainless steel bellows and bellows rod, paddles
for pipes and microswitch spring. EPDM O-Ring seals,
self-extinguishing polycarbonate cover and microswitch protection
casing. The flow switch design must include a 1” NPT female
connection. Each flow switch shall be Caleffi model 626600A or
approved equal. (See product instructions for specific installation
information.)
Cale North America, Inc. 3883 West Milwaukee Road / Milwaukee, WI 53208
Tel: 414.238.2360 / Fax: 414.238.2366 / www.cale.us © Copyright 2010 Cale
We reserve the right to change our products and their relevant technical data, contained in this publication, at any time and without prior notice. Contractors should request production drawings if prefabricating the system.
Size ...................................................................................................
Quantity ............................................................................................
Approval ............................................................................................
Service ...............................................................................................
Tag No. ..............................................................................................
Notes .................................................................................................
Job name ..........................................................................................
Job location .......................................................................................
Engineer ............................................................................................
Mechanical contractor ........................................................................
Contractorʼs P.O. No. ..........................................................................
Representative ...................................................................................
B
ED
C
A
Cv=flow in gal/min forapressure loss of 1 psi
Size 1" 1 1/4" 1 1/2" 2" 2 1/2" 3" 4" 6" 8"
Cv 11.5 24.3 37.6 67 139 208 405 1098 2255
Kv (m
3
/h) 10 21 32.5 58 120 180 350 950 1950
Code A B C D E Weight (lb) (kg)
626600A
1" 3 7/16" 5 5/16" 2 15/16" 2 3/8" 2.05 0.93
Δp (psi)
100
0.01
0.1
0.02
0.03
0.05
0.2
0.3
0.5
0.04
0.4
1
50
2
0
1
0
5
10
20
5
2
1
0.5
1
2
1 1/2"
2"
1 1/4"
1"
(psi) (kPa)
0.01
0.1
0.02
0.03
0.05
0.2
0.3
0.5
0.1
1
0.2
0.3
0.5
2
3
0.04
0.4
1
5
500
1000
1000
2000
5000
(m
3
/h) (
gpm
)
500
20
0
10
0
50
200
8"
3"
2 1/2"
4"
6"
Dimensions
The stated Cv (Kv) values refer to the head loss within the pipes with
diameters from 1” to 8” and standard length of 39 in (1 m), in which flow
switches, equipped with a paddle (blade) of adequate size, are installed.
30V9
U
L
®
C US