Caleffi 121 FlowCal™ 1" NPT female automatic flow balancing valve with integral ball valve.

• Brass body
• Patented anti-scale, low noise polymer FlowCal™ cartridge
• Max. working pressure: 400 psi (400 WOG)
• Temperature range: 32 - 212°F (0 - 100°C)
• Max. percentage of glycol: 50%
• Differential pressure control ranges: 2 - 14, 2 - 32, 4 - 34, 5 - 35 psid
• Flow rate: 27 fixed flow rate settings ranging from 0.5 - 21 GPM
• Flow accuracy: ±10%
• US Patent 7,246,635 B2
• Available with optional factory-installed pressure and temperature test ports (1213xxx series).

Select desired flow rate in the chart below to complete full product code.

Select last three digits of the product code in the dropdown above before adding to cart.

Size	GPM	Last 3 digits of product code	Differential Pressure Control Ranges (psid)
½", ¾"	½	G50	2 - 14
½", ¾"	¾	G75
½", ¾"	1	1G0	2-32
½", ¾"	1 ½	1G5
½", ¾"	2	2G0
½", ¾", 1"	2 ½	2G5
½", ¾", 1"	3	3G0
½", ¾", 1"	3 ½	3G5
½", ¾", 1", 1 ¼"	4	4G0
½", ¾", 1", 1 ¼"	4 ½	4G5
½", ¾", 1", 1 ¼"	5	5G0
½", ¾", 1", 1 ¼"	6	6G0	4 - 34
½", ¾", 1", 1 ¼"	7	7G0
½", ¾", 1", 1 ¼"	8	8G0
½", ¾", 1", 1 ¼"	9	9G0	5 - 35
½", ¾", 1", 1 ¼"	10	10G
1", 1 ¼"	11	11G	3 - 32
1", 1 ¼"	12	12G
1", 1 ¼"	13	13G
1", 1 ¼"	14	14G	4 - 35
1", 1 ¼"	15	15G
1", 1 ¼"	16	16G
1", 1 ¼"	17	17G
1", 1 ¼"	18	18G
1", 1 ¼"	19	19G
1", 1 ¼"	20	20G
1", 1 ¼"	21	21G