Ball valve, Gate valve,Globe valve,Check valve,Plug valve,Butterfly valve,Valve parts

Introduction for Ball check valve

Ball check valves have two type, one type is single ball type check vaLve, anther type is more balls type check valve.sliding ball type check valves disc is a ball coated with rubber and dependant on the line pressure the ball can slide up and down in the integrated chute in the body to open or close the valve without any noise and water-hammering and good sealing capability The bore is full without any block so the flow rate is much with little resisting force and little pressure loss and water-head loss is 50% of swing check valves.It can be installed vertically or horizontally and widely used in cold waters,hot waters,industrys and sewages ppipeline and it is more for sewage submersible pump.

Silent check valve

Silent check valve have anther name is lift check valves, it is widely utilized for feedwater system and drain system. Valve disc is guided by central shaft at two ends, realizing on-off rapidly. The valve can be installed vertically or horizontally. The disc is loaded by spring which can close the valve quickly and reduce water hammer pressure effectively. Silent check valve has small volume, light weight and long service life.

The check valve consists of valve body, seat, baffle, valve disc, bushing, spring, etc. The inner channel adopts streamline design for low pressure losses and short closing stroke, which can close rapidly to avoid loud water hammer noise and keep silence. This kind of check valve is mainly installed at the exit of pump for feedwater, drain, fire protection and heating systems to avoid the damage to the pump caused by back flow of medium and water hammer.

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: Lowest possible pressure drop across the valves. 100% leak proof sealing years over years. Non-clogging and self cleaning as ball rotates during operation. Virtually no wear and tear, no maintenance and longer service life. Higher solid handling capacity due to full bore and straight internal path. 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. 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

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 80 continuously (for 100  application 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 Head Loss 1.(Pressure Drop) Low, Due to light, free flowing rubber ball, without causing any interference, resulting in lower power consumption (frictionless) 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.