JOAP: SANHUA - R290 Propane Catalogue - 2020

148 sanhuaeurope.com GZJA SERIES GZJA sub-assemblies include a CBVT ball valve (PS=140bar) and a BCV check valve (PS=90bar); they are typically used in commercial CO 2 refrigeration applications, to isolate specific parts or components present in the system. With the ball valves in closed position the refrigerant cannot achieve the isolated component, but it can be suck up through the check valves. A typical application is keeping evaporator coil isolated without over pressurizing due to warmup. GZJA SUB ASSEMBLY SERIES: BALL VALVE + CHECK VALVE [R744 SUB-CRITICAL] FEATURES • RELIABLEWELDINGQUALITY, ANDAVOIDWELDINGMISTAKEOF CHECKVALVEDIRECTION • COMPACT DESIGNTOSAVE INSTALLATIONSPACE GENERAL SPECIFICATIONS • Applicable for R744 (CO 2 ) • Medium temperature TS min./max.: -40°C/+90°C • Max. Operation pressure PS: 9MPa (90bar) • Certification: PED declaration • UL certification – Not available (on request) The symbol ‘A’ indicates the pressure relief side of the sub assembly. Any pressure builds up on the ‘A’ side with the ball valve in the closed position can relieve to the other side of the ball valve. When used on an evaporator coil, the ‘A’ side of the assembly should always be on the coil side. (Refer to Figure 1.) Figure 1