|Normex Ball Foot Valves has received a special status in negative suction pumping applications. Normex Ball foot valve is regarded as the most reliable, 100% leakproof foot valves. & is an only solution for typical priming problem.
In the application where footvalve is involved, the main concern of the user is letting away of media by the foot valve. This calls for the ‘priming.’ of the the pump which is time consuming & tedious job. If the “on-off frequency” is more, the trouble rises multifolds. A heavily leaking footvalve can also give rise to start up trouble to pump as suction line never gets filled completely. A leaking footvalve can cause not only time wastage but also delay in process industry where water is required at particular instant.
In typical case of Fire fighting application, if foot valve leaks, pump is not started can cause damage to property as well as life.
Even in application in irrigation / agriculture sector, where electricity is available for limited time & intermittent (in rural India) priming pump every time/any time of day & night is a loss to pumping time.
With Ball foot valve (Threaded or Flanged) installed the frequent priming is totally avoided for a very long span months to years.
Normex Ball foot valves (along with Ball Check & Butterfly valves) are regularly & exclusively recommended by many consultants for many years. The Plumbing, Fire, HVAC, Irrigation contractors are also convinced by the reliability of these valves all leading to customer satisfaction.
The principal features & comparison of foot valves are similar to Ball Check valves(B-01).
|2) Ball Foot valve (Flanged) B-05
These are the check valves converted to foot valves by installing strainer to the inlet side.
They are generally recommended for sizes of 250mm,300mm & 350mm NB.However,smaller sizes from 25mm TO 200mm are available & can withstand pressures of 16/10 kg/cm2 depending on size.
For normal application Model B-05(N) is recommended in the sizes from 50mm to 200mm.