Product Description
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This is a great "High Pressure" 20mm brass pressure reducing and regulating valve rated to 2,000 kPa and 80 degrees C max water temperature, comes with brass union connections and has "Watermark Approval". Capable of reducing any inlet pressure between 2,000 kPa and 1,000 kPa to a pressure of 600 kPa to 1,000 kPa. Fully adjustable using the included hex head driver and is factory set at 800 kPa. The valve has a 1/4" female BSP port on the outlet side of the valve so that you can install a pressure gauge to measure the outlet pressure. The pressure gauge is included in the price as are the brass unions. This valve even reduces the downstream pressure if there is no flow so it operates under static conditions!
PRESSURE REDUCTION RATIOS. PLEASE READ THIS AS IT IS IMPORTANT
Due to the numerous factors and variable conditions experienced such as system pressure, water temperature, air presence, #ow rate and velocity, which may affect the behavior of the pressure reducing valve, it is advisable that the pressure ratio between the upstream pressure and the downstream set pressure is kept ideally to a value 2:1 and no greater than a value of 3:1. (For example, upstream 1000 kPa, set pressure 500 kPa, the pressure ratio = 1000/500 = 2:1). In these conditions, the possible risk of cavitation and malfunctioning is minimised, however this does not exclude the possible effects of the many other variables within the system under operating conditions. The 536 is available with a high pressure spring and is adjustable between 600 - 1,000kPa which is particularly suited to high rise buildings where lower zones require staged pressure reduction. For example from 1,600kPa to 800kPa and then a second stage reduction from 800kPa to 400kPa with the Calef" 536 model PRV.
