Zurn Wilkins WTTA-5 ASME Thermal Expansion Tank, 3.5 Gallons.

Features:

Maximum Working Water Pressure = 150 PSIG
Total Volue (GAL) = 3.5
Acceptance Volume (GAL) = 2.3
Factory Pre-Charge (PSI) = 40
System Connection = 3/4" [19mm] FNPT (ANSI B1.201

Features & Benefits:

Bladder style tank for ASME approved installations	Extra heavy steel shell
Perfect for supporting boiler installations

Application:

Designed for installation on hot water systems to protect against thermal expansion. All WTTA tanks are ASME fixed bladder type for commercial and industrial applications. When system pressure increases due to thermal expansion, water enters the tank’s bladder which expands into the pre-charge air chamber, keeping system pressure below the relief valve setting. Conforms to all lead-free requirements and acceptable for use on drinking water systems.

Engineering Specifications:

The Water Thermal Expansion Tank shall be constructed in accordance with Section VIII of the ASME Boiler and Pressure Vessel Code. The outer shell shall be carbon steel. The bladder shall be FDA approved butyl rubber and prevent water from contact with shell interior. The assembly shall have a top NPT stainless steel system connection and a 0.301”-32 charging valve connection (standard tire valve) to facilitate the on-site charging of the tank to meet system requirements. The Water Thermal Expansion Tank shall be a ZURN WILKINS Model WTTA.

Typical Installation:

Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted at least 18” from the cold water inlet to the heater. NOTE: Pre-charge should be adjusted to match incoming water pressure after installation (adjust pre-charge with no water pressure in tank).

Standard Compliance:

ASME Section VIII

Materials:

Outer Shell: Carbon Steel
System Connection: Stainless Steel
Bladder: Butyl Rubber (FDA approved)

Technical Documentation:

Zurn Wilkins WTTA-5 ASME Thermal Expansion Tank, 3.5 Gallons Specification Submittal: Click Here.

Zurn Wilkins WTTA-5 ASME Thermal Expansion Tank, 3.5 Gallons Installation and Maintenance Instructions: Click Here.

Media:

Controlling Thermal Expansion:

Regulator Expansion or Thermal Expansion:

Cross Reference:

Zurn Wilkins WTTA-5 ASME Thermal Expansion Tank, 3.5 Gallons, Crosses:

Amtrol ST-5-C
Flexcon FTTA-5
Watts DETA-5
ELBI DTS-8
Wessels TTA-5
Bell & Gossett PTA-12