Specification

MC4400 (01/21)
Worthington Industries Inc., 1400 Division Road, West Warwick, RI 02893 USA T: 401.884.6300 www.amtrol.com
34
In-Line Models
Model
Number
Tank
Volume
Max.
Acceptance
Factor
A
Tank Diameter
B
Tank Height
System
Connection
(NPTM)
Shipping
Weight
Gal Lit In mm In mm In Lbs Kg
ST-5 2.0 8 .45 8 203 13 330 ¾ 5 2.3
ST-12 4.4 17 .73 11 279 15 381 ¾ 9 4.1
Stand Models
Model
Number
Tank
Volume
Max.
Acceptance
Factor
A
Tank Diameter
B
Tank Height
System
Connection
(NPTF)
Shipping
Weight
Gal Lit In mm In mm In Lbs Kg
ST-25V 10.3 39 1.00 15 381 19 483 ¾ 23 10
ST-30V 14.0 53 0.81 15 381 24 610 ¾ 25 11
ST-42V 20.0 76 0.57 15 381 32 813 ¾ 33 15
ST-60V 34.0 129 1.00 22 559 30 762 1¼ 61 28
ST-80V 44.0 167 0.77 22 559 36 914 1¼ 69 31
ST-180V 62.0 235 0.55 22 559 47 1194 1¼ 92 42
ST-200V 81.0 307 0.44 22 559 56 1422 1¼ 103 47
ST-210V 86.0 326 0.54 26 660 47 1194 1¼ 123 56
150 PSIG Working Pressure
THERM-X-TROL
®
Thermal Expansion Tanks: ST Series Non-ASME
Construction
Shell Steel
Diaphragm Heavy Duty Butyl NSF/ANSI 61
Liner Antimicrobial Polypropylene
System Connection Stainless Steel
Finish Urethane Topcoat
Water Circulator Turbulator
™
Air Valve
Projection Welded with InSight
®
Indicator Cap (In-Line Models Only)
Factory Precharge
In-line Models 50 PSIG (3.5 bar)
Stand Models 40 PSIG (2.8 bar)
Application
• For use in closed, potable hot water systems to
control pressure buildup.
• Accepts expanded water as temperature rises to
prevent relief valve discharge and system damage.
• Stand models designed for large residential and
light commercial applications.
• Multiple units can be installed to accommodate
larger systems.
• In-line models feature paten-pending InSight
®
Indicator Cap that changes color to indicate tank
service.
Performance
Maximum Operating Temperature 200°F (93°C)
Maximum Working Pressure 150 PSIG (10.3 bar)
Warranty
ST-5 through ST-12: 7-Year Limited
ST-25V through ST-210V: 1-Year Limited
All dimensions and weights are approximate.
SYSTEM
CONNECTION
CHARGING
VALVE
B
A
SYSTEM
CONNECTION
CHARGING
VALVE
B
A
Job Name _____________________________________
Engineer _____________________________________
Contractor _____________________________________
P.O. No. _____________________________________
Sales Rep. _____________________________________
Model No. _____________________________________
Notes _________________________________
_______________________________________
_______________________________________
_______________________________________
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MODELS ST-5
THROUGH ST-25V