200mm CI Ball Type NRV & Check Valves

200mm CI Ball Type Check Valve Nitrile Rubber Ball (Screwed) LIV-NRV-CI-FE-001 Lehry

 

• Lehry Make Ball Type Check ValveS Flanged END
• Type : Vertical Type
• Body : Cast Iron
• Ball : Nitrile Reinforced
• Cover Ring : Nitrile Rubber
• Ball Seat Ring : L.T. Bronze
• Fasteners : Carbon Steel
• Pr. Rating : Body : 15Kg/Cmsq
• Seat : 10Kg/Cmsq
• End Connection : Flanged Ends
• Operation : Manual

 

The Reinforced Rubber Ball Is The Heart Of This Valve. This Ball In The Designed Path Of The Valve Moves Freely Andpromptly Reacts To The ON & OFF Of The Pump. The Ball Moves To Open Position When The Pump Starts & Allows Free Flow Of Liquid Without Any Interference. (Fig- A) As The Pump Stops, The Ball Seats Firmly Against The Metal Seat
Due To Its Own Weight & Back Pressure Of The Liquid (Fig-B) This Results In DROPLESS Sealing

 

Silent Features

• New generation valve with unique and non-conventional design
• Suitable for a very wide range of applications like slurry, sewage, paper, chemical, water supply,
  agriculture, muddy water, slurry, paper stock, viscous liquid and clear water.
• Robust and very simple mechanism.
• A floating reinforced rubber coated ball is used instead of hinge-pin-disc.
• Highly sensible to arrest flow with perfect sealing.
• Very low head loss
• Non clogging and self cleaning mechanism
• Maintenance free
• Power saving
• Large solid handling capacity
• Dimensionally conforming with IS 5312
• Installation can be vertically or horizontally
• Operates silently upto 80˚C
• This valve has a quality for withstanding consistent performance and longer life.

 

Pressure Rating

• Size 25 - 125 mm = PN 16
• 150 - 300 mm = PN 10, 350mm =PN 6
• Body test : 1.5 times rated Pressure
• Seat test : 1.1 times rated Pressure

 

Material of Construction

Part	Description	Standard	On Request
1	Body	Cast Iron	St.Steel / Cast Steel
2	Body	Cast Iron	St.Steel / Cast Steel
3	Ball	Nitrile Reinforced	EPDM, Neoprene
4	Cover Ring	Nitrile Rubber	Butyle, Viton
5	Ball Seat Ring	L. T. Bronze	St. Steel, Hard Rub.
6	Fasteners	Carbon Steel	St. Steel

 

200mm Lehry CI Ball Type Check Valve S/E & F/E

Ensuring unidirectional flow in piping systems is critical for preventing backflow and maintaining process integrity. CI Ball Type NRV and check ball valve designs offer a simple yet effective solution for this purpose. These valves, also known as non-return valves (NRVs), allow fluid to flow in one direction only, automatically closing when the flow reverses.

CI ball type check valves are commonly manufactured from cast iron (CI), offering a robust and cost-effective solution for various industrial and commercial applications. Cast iron provides good resistance to corrosion and abrasion in many common fluids.

One specific type is the CI ball type check valve screwed, which features threaded end connections. Screwed connections offer ease of installation and maintenance, particularly in smaller pipe sizes. These valves are widely used in applications where quick assembly and disassembly are required.

The basic operation of a ball check valve involves a spherical ball that rests against a seat within the valve body. When the fluid flow is in the intended direction, the pressure of the fluid lifts the ball off the seat, allowing flow. If the flow attempts to reverse, the ball is pushed back onto the seat by the back pressure, creating a tight seal and preventing backflow.

Choosing the right check ball valve depends on several factors, including the fluid being handled, operating pressure and temperature, pipe size, and the required level of leak-tightness. CI ball type NRVs and their variations offer a reliable and economical solution for many non-critical applications where positive shut-off is not always the primary concern. For more demanding applications requiring tighter sealing, other check valve designs might be more suitable. However, for general-purpose backflow prevention, the CI ball type check valve, especially the screwed variant, remains a popular choice due to its simplicity and ease of installation.