Product Overview
Accessories
Code*
120l 4l A 000
120l 5l A 000
120l 6l A 000
120l 7l A 000
1/2”
3/4”
1”
1 1/4”
 8.0
 8.4
19.0
20.0
Cv
120 Y-Strainer
Combination of Y-strainer
and ball valve.
Brass body. 
Stainless steel filter cartridge.
Maximum working pressure:  400 psig (400 WOG)
Working temperature range:  32–212°F (0–100°C)
Strainer mesh diameter:  0.87 mm (20 mesh)
Connections:  - body:  1/2", 3/4", 1", 1 1/4" FNPT union x FNPT,
    or sweat union x sweat
Pressure and temperature ports:  1/4" NPT
Drain port connection:  1/4" for 1/2" & 3/4"; 1/2" for 1" & 1 1/4"
*4
th
 digit: 1 = No PT ports; 3 = Factory-installed PT ports.
 6
th
 digit: 1 = NPT end connections; 9=Sweat end connections.
PT test ports
Fast-plug pressure/temperature test ports for 
FlowCal automatic flow balancing valves and the 
120 series Y-strainer.
Their special construction enables rapid and 
accurate measurements without the need to 
leave expensive test equipment inline. The 
double-sealing core insures long and trouble-free 
service.
Can be used for:
- checking the operation of FlowCal balancing 
 valve;
- checking for strainer clogging;
- checking the heat output of the emitter 
 terminals.
Low Lead brass body.
Nordel Core.
Working temperature range: 0–275°F (-18–135°C)
Max. working pressure: 435 psi (30 bar).
100001A
1/4” NPT PT Test Port and Cap, standard size, 
1 1/2" length (pair)
Code
538  
Drain valve
with 3/4" garden hose connection.
538202 FD
538402 FD
1/4”
1/2”
Code
121 series 
Automatic flow balancing valve and integral ball valve, FlowCal. Brass body. Anti-scale low noise polymer cartridge. Stainless steel 
spring. EPDM seals. Chrome-plated brass ball. PTFE ball seat and stem seal. Zinc-plated steel lever with vinyl grip. Brass pressure 
and temperature port plugs. Medium: water and glycol solutions. Maximum working pressure rating is 400 psig (400 WOG). 
Maximum percentage of glycol 50%. Temperature range 32 - 212°F (0–100°C). Accuracy ± 10%. 
D
p Range 2–35 psid. Range of 
available flow rates: 0.5–21 GPM. Connections 1/2”, 3/4”, 1” and 1 1/4” NPT female or Sweat with union x NPT female or Sweat.
 SPECIFICATION SUMMARIES
Size
Size
Size
Caleffi North America, Inc. 
3883 W. Milwaukee Road 
Milwaukee, WI  53208 
Tel: 414-238-2360 · Fax: 414-238-2366
sales@caleffi.com · www.caleffi.com
© Copyright 2019 Caleffi North America, Inc.








