Section Code 1890 :
Back To Directory SectionsMcDonald Steel Flow ranges of Direct, Indirect, Solar Single, Solar Twin, Slim Direct and Slim Indirect stainless steel insulated unvented hot water storage cylinders with external expansion. The DHW circuit consists of a temperature and pressure relief valve set at 7.0 bar and 90°C, an inlet control group consisting of a pressure reducing valve adjustable between 2.7 and 3.3 bar, an expansion relief valve (SRV) set at 6.0 bar, a strainer and a check valve cartridge, verified by test (suitable for backflow protection against Fluid Category 2) also supplied with a tundish. Maximum supply pressure to the inlet control group 10.0 bar. Maximum working pressures - Primary circuit 6.0 bar, Secondary circuit 5.5 bar. Maximum operating temperature 65˚C.
Stainless steel indirect thermal store. The primary circuit is factory fitted with a temperature and pressure relief valve (3 bar and 92°C). Hot water storage for space heating via air to water heat pump Maximum working pressure: Primary circuit 3.0 bar Maximum operating temperature 85°C.
SSB, SSI SST range of stainless steel unvented cylinders provided with an unvented kit supplied with cylinders containing a temperature and pressure reducing valve set at 3.0 bar and an expansion vessel and single check valve (suitable for fluid category 2) . Available as storage tank, indirect or twin coil. Maximum working pressure of the cylinder 6.0 bar, maximum working pressure of the coil or coils 12.0 bar. Maximum operating temperature 95°C.
Range of domestic stainless steel indirect unvented hot water storage cylinder incorporating a stainless steel coil for connection to a heat pump circuit. The secondary circuit is factory fitted with a temperature and pressure relief valve (10 bar and 92°C) and an Incoloy immersion heater and magnesium sacrificial anode. Maximum working pressure: Secondary circuit 9.5 bar. Maximum operating temperature 95°C.
Range of indirect and direct unvented storage cylinders consisting of either no coil (GLE) or a factory fitted single (GLC) or twin coil (GLT). The secondary circuit is supplied with a temperature and pressure relief valve set at 7.0 bar@85˚C for 1.0-6.0 bar products and 10.5 bar@95°C for 6.0-10.0 bar products. The products are supplied with an inlet control group (safety kit) consisting of a pressure reducing valve, an expansion relief valve 6.0 bar (1.0-6.0 bar products) or 10.5 bar (6.0-10.0 bar products) and an approved check valve, however, the complete product has not been fully tested to demonstrate it provides backflow protection. Product is also supplied with an expansion vessel. Maximum working pressure 10.0 bar. Maximum operating temperature 85°C
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