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Advantages:- Very good pump venting - No jamming of the gravity brakedue to lower thermal load(gravity brake in the return ball valve)- Gravity brake can be set up without tools- Replaceable spindle seals for ball valves Spindle sealsfor the ball valves- no rusting of the screw connectionsdue to brass union nuts- with 1 1/4", only a cheaper 1" pump is required as the flow rates are identical.Flow version rightFlow:1 x 3-way flow pump flange ball valvewith thermometer handwheel(thermometer ring red)2 x union nut and seal1 x pump flange ball valve withinsulation T-handleFor 1" and 1 1/4" versions, the more favourable 1" pump is always used(same flow rate as 1 1/4" pumps)Return:1 x 4-way return pump flanged ball valvewith thermometer handwheel(thermometer ring blue) and adjustablegravity brake by turning 45°the handwheel.1 x union nut, seal and MS-connection AG x IG 1 x bypass set with differential overflow valve(5.0 Kv) to equalise the system pressure. For regulating 0 to 50 KPa.With compression fittings andCU pipe 22 mm for centre distance 125 mm
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