AMTROL SX-90V, (390297) STAND MODEL, SX MODELS: EXTROL VERTICAL BOILER SYSTEM EXPANSION TANKExtrol floor-standing models are designed for large residential and light commercial applications. These non-ASME tanks are available in sizes up to 86 gallons and can be used with high output boilers up to 1,500,000 BTU's. ASME Commercial tanks are also available and can be found in catalog MC 2682.
Factory pre-charge: 12 psig.
Maximum working pressure: 100 psig.
Maximum operating temperature: 240??F.