Principal:

Ball Type Check Valves (NRV) B-01 was the first of the valve at Normex with unique design and technology for the first time in India. A very simple and robust design with no mechanism involved. The heart ofб═ valve is rubber coated ball. The mechanism hinge-pin-disc used in conventional check valves is eliminated and Normex has put in this rubber coated ball to arrest flow media in return condition.

As the pump starts, the ball moves out totally from the flow path when the pumping is on giving a full bore maximum flow/discharge with minimum head losses. (Fig. A). As the pump stops, the ball rolls back and seats perfectly on the rounded valves seat ensuring totally leak proof sealing.(Fig. B)

Salient Features:

1. Lowest possible pressure drop across the valves.
2. 100% leak proof sealing years over years.
3. Non-clogging and self cleaning as ball rotates during operation.
4. Virtually no wear and tear, no maintenance and longer service life.
5. Higher solid handling capacity due to full bore and straight internal path.
6. Lower head loss-high discharge, reduced pumping time-All leading to Energy Saving.

Applications:

Clean water, Raw water, Sewage, Slurry, Waste water, Viscous liquids etc.

Used in industries like:

Fire fighting, Plumbing, Water distribution, Water/Sewage treatment, Irrigation/agriculture, Sewage plants, Steel mills, Power stations, 
Chemical/process industries, HVAC, Sugar/food industry, Breweries, Mining and many more.

This Ball Check Valves is designed specially for lower pressure applications where the pipes are threaded. The working principal and featuresare as model B-01 giving all the advantages of the Ball Type design.

The typical applications are domestic pumping, low rise building pumping, small irrigation systems. The working pressure is 6 bar.

Normex Valves Pvt. Ltd. brings this latest technology for the first time in India. Silent Check Valves are a short length double flanged valves with all the internals designed Hydrodynamically. This valves, when open, the annular area between the body & plunger available for flow, is equal to the nominal bore area. Therefore, unlike other spring loaded valves & conventional flapcheck valves, these valves offer lower head losses & maintains laminar flow. As the valve closes, due to return spring force, valve is “Quick Closing”. The valve gets closed before the start of back flow / return velocity. Hence, water hammer is eliminated in most of the cases.

Features:

1.Working principal Hydrodynamic guided closing.
2.The closing mechanism is guided & backed with return spring for quick closing,
opening & perfect sealing.
3.Due to Aero/hydro dynamic effect water hammer is eliminated.
4.Very low pressure loss
5.Most suitable for clear liquids & air.
6.Silent operation.

Rubber Lined Check Valves (Flanged) are lined internally with Ebonite Hard rubber so that media does not come in contact with metal. This Model is most suitable for corrosive/erosive applications. The overall dimensions of this valve will be similar to standard Ball NRV bur face. To face length will br more by 6-10mm.

Normex, pioneers and manufacturers of unique Ball Check Valves, Ball Foot Valves, Hydrodynamic Guided NRVS have introduced yet another design of Non Return Valve Wafer check Valves. Normex wafer check valves are simple in construction have sturdy design & are reliable in operations. These valves are very useful where weight of the valve is required be low & there is a space constraint for valve fitment. The face to face distance in these valves is extremely less as compared to standard valves.

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.

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 footvalves (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.