+91-20-66114538
+91 86058 24555
info@normexvalves.com
 
 
 

Ball Type Check Valves, Normex Check Valves, Flap Type Return Valves, Manufacturer, Pune, India

 
CHECK VALVES
 
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.

 
Fig - A Fig - B
Ball Type Check Valves (NRV)
 
DESCRIPTION STANDARD MATERIAL ON REQUEST
BODY/COVER CAST IRON (GG25) S.G.IRON(DI)/WCB/ST.STEEL
BALL NITRILE REINFORCED NEOPRENE/EPDM
SEAT RING L T BRONZE ST.STEEL
FASTENERS CARBON STEEL ST. STEEL
PAINT ENAMEL/EPOXYб═ PAINT  
END CONNECTION FLANGED  
 
 
SIZE RANGE 25mm TO 350mm
PRESSURE TESTING BODY: 1.5 X PN
  SEAT : 1.1 X PN
   
PRESSURE RATING - KPa  
25mm TO 125mm PN 1.6
150mm TO 300mm PN 1.0
350mm PN 0.6
INSTALLATION HORIZONTAL AS WELL AS VERTICAL
FACE TO FACE LENGTH IS 5312 PART I -1984/ DIN 3202-F6
TEMPERATURE SUITABLE UPTO 800C
 
 
• Dimensionally compatible with IS 5312 (Face to Face)
• Can be installed vertically or horizontally
• Operates silently
• Operates at temp 800C continuously (for 1000Capplication please contact us.)
 
 
Dimensions (A = Valve size in mm)
A 25 40 50 65 80 100 125 150 200 250 300 350
D 115 150 165 185 200 220 250 285 340 395 482 527
L 144 174 200 240 260 300 350 400 500 600 700 800
H 115 160 180 210 230 280 340 400 500 570 680 800
T 15 15 16 16 19 20 21 21 22 24 25 29
 
 
COMPARISON
 
 

 

Normex Check Valve - Ball Type Conventional - Flap Type Return Valves
1. Head Loss
(Pressure Drop)
 
Normex Check Valves
Low, Due to light, free flowing rubber ball, without causing any interference, resulting in lower power consumption (frictionless)
 
 
Flap Type Return Valves

High, Due to interference of the heavy hinge/disc mechanism, with the flow resulting in high power consumption.
 
2. Perfect Sealing
 
The sealing face is deposit free, since it remains inclined in any position of the valve, ensuring perfect sealing. (Drop less)
 
 

Deposits on the sealing due to its flatness may not ensure perfect sealing.
 
3. Solid Handling Capacity
Clear passage, equal to nominal valve dia. gives larger solid handling capacity
The above interference leaves a clear passage less than the normal valve dia., hence smaller solid handling capacity
4. Self Cleaning
Any deposits formed on the ball and in the valve passage are removed due to the rolling of the ball in operation.
No such possibility
5. Non-Clogging
Nature
No moving parts other than the free moving ball, hence no jamming/clogging.
Moving parts may jam due to deposits.
6. Applications
Unlimited. Ideal for slurries, sewage, viscous, erosive & corrosive liquids.
Limited. Troublesome for slurries, sewage & viscous liquids.
7. Maintenance
Abrasion resistance of rubber ensures longer life. Also the cleanout port does not necessitate valve removal from the pipeline. Hence much shorter downtime.
Parts may wear out due to abrasion. Also, valve may be removed from the pipeline for maintenance/ cleaning. Hence longer down time.
 
 
 
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