Model ABF Vented Dual Check / ASSE 1022

 

Description

The model ABF ASSE 1022 vented dual check backflow preventer protects the connected plumbing and drinking water from the corrosive effects of CO2 gas. The CO2 gas mixed with water in a carbonator tank downstream from the backflow preventer exerts backpressure on the discharge primary check valve on every pumping cycle. If this check valve becomes fouled and leaks, the CO2 gas and water mixture will exhaust through the vent fitting. The secondary check insures that it cannot pass to the inlet or contact any brass or copper from the connected plumbing. The simple internal construction is easy to clean. It utilizes a lead free brass body and stainless steel discharge retainer. Under no circumstance is the CO2 gas and water mixture exposed to the lead-free brass inlet or the connected plumbing.

SPECIFICATIONS/ APPROVALS SERVICE CONDITIONS APPLICATION
ASSE 1022
ANSF18
AB1953/VT193
Pressure 10-200 psi
Temperature 40°-130° F
Flow 2.4 GPM at 15PSA
Carbonators-Remote
Carbonators-Post Mix
Carbonators-Cold

 

PLUMBING CODE REQUIREMENTS

Both the UPC (Universal Plumbing Code) and NSPC (National Standard Plumbing Code) as the primary plumbing codes in the US require the use of an ASSE (American Society of Sanitary Engineers) 1022 (Performance Requirements for Backflow Preventers on Carbonated Beverage Machines) backflow preventer on the supply to carbonators under UPC 603.4.13 and NSPC 10.5.8.

"Lead Free"

CLICK ON LOGO FOR CERTIFICATIONS

CONFIGURATIONS

PART NUMBER END CONNECTION MATERIAL VENT BARB NOTES
ABF-1LL 3/8"NPT Inlet Lead Free Brass 1/4" ABS Direct Pump
  3/8" Flare Outlet SS   Mounting
PART NUMBER END CONNECTION MATERIAL VENT BARB NOTES
ABF-1SPLL 3/8"NPT Inlet Lead Free Brass 1/8" Brass Direct Pump
  3/8" Flare Outlet SS   Mounting
PART NUMBER END CONNECTION MATERIAL VENT BARB NOTES
ABF-1SP1LL 3/8" NPT Inlet Lead Free Brass 1/4" Brass Mounting
  3/8" Flare Outlet SS   Mounting
PART NUMBER END CONNECTION MATERIAL VENT BARB NOTES
ABF-1FLL 3/8" Flare Inlet Lead Free Brass 1/4" ABS In Line
  3/8" Flare Outlet SS   Mounting
PART NUMBER END CONNECTION MATERIAL VENT BARB NOTES
ABF-1SS 3/8" NPT Inlet SS 1/4" ABS Direct Pump
  3/8" Flare Outlet     Mounting
PART NUMBER END CONNECTION MATERIAL VENT BARB NOTES
ABF-1BLL 3/8" or 1/2" OD Barb Inlet Lead Free Brass 1/4" ABS Non-Carbonated
  3/8" or 1/2" OD Barb Outlet     Beverages

 

How It Works

  1. Normal forward flow of H2O has both check valves open and the vent closed
  2. Normal backpressure of CO2/H2O has both check valves and vent closed.
  3. Either check valve leaking causes pressure to rise between check valves and the vent will open.
  4. Requires a minimum torque of 30 ft-lbs at center joint to function properly.
  5. Any leakage from vent indicates a fouled check valve.
  6. A LEAK AT THE VENT IS NORMAL AND WILL HAPPEN IN SERVICE DUE TO DIRTY OR FOULED CHECK VALVES. SIMPLY CLEAN AND RETORQUE THE DEVICE OR USE REPAIR KIT ABF-RK.

 

 



1629 West Bobo Newsom Hwy., Hartsville, SC USA 295501.843.332.4111  •  1.800.476.9876  •  Fax: 1.843.332.3752