Specifications

Use Caleffi 573 series 20mm non-testable vented dual check valve with female union ends and integrated strainer.

Yuhuan Tino Imp&Exp Co., Ltd is complex of producer and trading company , mainly producing kinds of safety valves,  T61M seriese for electric water heater, T611-614 for wall-hung boiler and central heating system,  61T1-61T2 is designed for pressure vessel such as solar water heater, any steam tank ,which need control temperature and pressure.

And Automatic air vent including solar air vent, home appliance water pressure reducing valve. And other brass fitting. 

 

designed purpuse:

The backflow preventer with atmospheric vent is designed to protect  drinking water systems from the return, caused by backsiphonage or backpressure, of contaminated fluids

 

Description:
Dual check continuous pressure backflow preventer with atmospheric vent.
 
Brass body.
 
Max working pressure:  175 psi
Max working temp range:  32  - 210 F

 

Drawing