Brochure

110 63-8702
TK300 Series Expansion Tanks—Heating
Expansion Tanks absorb hot water expansion in closed heating
systems. They are equipped with butyl diaphragms to separate the
air from the system water. Pre-pressurized, the tank keeps fluids
circulating and maintains minimum pressure.
• Butyl/EPDM diaphragm - 9 times better than natural rubber
• Deep-drawn steel tank
• Controls system pressure
• Air-tight cushion-factory pre-charged to 12 psig and 100% tested
• 7 year warranty for units with date code 1901 or newer.
Maximum Safe Operating Pressure (psi): 100 psi
Maximum Safe Operating Pressure (kPa): 689 kPA
Operating Temperature Range: 240°F Maximum (115°C Maximum)
Comments: Heating
Material Number Connection
Size (in.)
Connection
Type
Diameter Height Volume Weight Maximum
Acceptance
Volume
Materials
TK300-15/U 1/2 in. Male NPT 8 in. (203.2 mm) 12 5/8 in.
(321 mm)
2.0 gal (7.6 L) 5 lb (2.3 kg) 1 gal (3.8 L) Steel shell; Heavy duty Butyl
diaphragm
TK300-30/U 1/2 in. Male NPT 11 in. (279 mm) 15 1/2 in.
(394 mm)
4.4 gal
(16.7 L)
9 lb (4.1 kg) 2.5 gal (9.5 L) Steel shell; Heavy duty Butyl
diaphragm
TK300-60/U 1/2 in. Male NPT 11 in. (279 mm) 23 in.
(584 mm)
7.6 gal
(28.8 L)
14 lb (6.4 kg) 2.5 gal (9.5 L) Steel shell; Heavy duty Butyl
diaphragm
TK300-90/U 1/2 in. Male NPT 15 3/8 in.
(390.5 mm)
21 in.
(533 mm)
14.0 gal
(53.1 L)
23 lb (10.4 kg) 11.5 gal (40.1 L) Steel shell; Heavy duty Butyl
diaphragm
Expansion Tank Sizing based on BTU’s
Boiler Type of Radiation
Net Output in 1000’s of BTU/Hr Finned Tube Baseboard or
Radiant Panel
Convectors or Unit Heaters Radiators Cast Iron Baseboard Cast Iron
MBH Use Model Use Model Use Model Use Model
25 TK300-15 TK300-15 TK300-15 TK300-15
50 TK300-15 TK300-15 TK300-30 TK300-30
75 TK300-30 TK300-30 TK300-30 TK300-60
100 TK300-30 TK300-30 TK300-60 TK300-60
125 TK300-30 TK300-60 TK300-60 TK300-90
150 TK300-30 TK300-60 TK300-90 TK300-90
175 TK300-60 TK300-60 XPS-030V XPS-030V
200 TK300-60 TK300-60 XPS-030V XPS-030V
250 TK300-60 TK300-90 XPS-030V XPS-040V
300 TK300-90 XPS-030V XPS-030V XPS-040V
350 XPS-030V XPS-030V XPS-040V XPS-060V
400 XPS-030V XPS-040V XPS-040V XPS-060V
Service Check Valves
Service Check Valves for air vents and expansion tanks allow easy
field service without draining system.
CAUTION: Reduce system temperature to ambient and pressure to 0
psi before servicing component. Failure to do so may result in injuries.
Maximum Safe Operating Pressure (psi): 100 psi
Maximum Safe Operating Pressure (kPa): 689 kPA
Operating Temperature Range: 240°F Maximum (115°C Maximum)
Material Number Connection Size (in.) Connection Type
SCV-0125/U 1/8 in. Inlet FNPT, Outlet MNPT
SCV-050/U 1/2 in. Inlet FNPT, Outlet MNPT
Commercial Expansion Tanks