Watts ET-RA - Manual

Series ET-RA
ASME
Pressurized Expansion Tanks for
Heating and Cooling Systems
Models ET-RA 35 to ET-RA 2000
Watts Model ET-RA Tanks are ASME removable bladder
type pre-charged expansion tanks. They are designed to
absorb the expansion forces and control the pressure in
heating and cooling systems. The water is contained in the
heavy duty bladder preventing tank corrosion and water-
logging problems. ET-RA expansion tanks reduce tank
sizes up to 80%.
FEATURES
• ASME Section VIII Code Construction
• Removable Butyl Bladder
• Precharged to 12 psi (Field Adjustable)
CONSTRUCTION
Shell: Carbon steel
Bladder: Heavy duty butyl
Prime Painted Exterior
PRESSURE - TEMPERATURE
Maximum Design Pressure: 125 psig* (8.5 bars)
Maximum Design Temperature: 240
°
F (115
°
C)
Precharged to 12 psi (83 kPa)
*200 & 250 psig available.
SPECIFICATIONS
Furnish and install as shown on plans a Watts Model ET-
RA ____ gallon ____ " diameter x ____" (high) pre-charged
steel expansion tank with a heavy duty butyl rubber blad-
der. The tank shall have NPT system connections and a
.302" - 32 charging valve connection (standard tire valve)
to facilitate the on-site charging of the tank to meet sys-
tem requirements. The tank must be constructed in accor-
dance with Section VIII of the ASME Boiler and Pressure
Vessel Code.
For Heating and Cooling Systems
Job Name Contractor
Job Location Approval
Engineer Contractor’s P.O. No.
Approval Representative
ES-ET-RA
Watts product specifications in U.S. customary units and metric are ap-
proximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change
or modify product design, construction, specifications, or materials with-
out prior notice and without incurring any obligation to make such changes
and modifications on Watts products previously or subsequently sold.
USA: 815 Chestnut Street, North Andover, MA 01845-6098
Canada: 5435 North Service Road, Burlington, Ontario L7L 5H7
Tank
Model Volume
Number Gallons Tagging Information Quantity
ET-RA 35 10
ET-RA 50 13
ET-RA 85 23
ET-RA 130 35
ET-RA 200 53
ET-RA 300 79
ET-RA 400 106
ET-RA 500 132
ET-RA 600 158
ET-RA 800 211
ET-RA-1000 264
ET-RA-1200 317
ET-RA-1400 370
ET-RA-1600 422
ET-RA-2000 528
Schedule