Flanged Butterfly Check Valve Bs5155

Our mission is to continually improve the quality of our Inconel 600 Bellows Seal Gate Valve, Hastelloy G30 Butterfly Valve, PVDF Diaphragm Valve and services, and we ensure that we have the capability and capacity to do so. We have been pursuing to create more value for our customers and friends continuously, whether before or after the transaction, we keep creating, that's what we do. Since the establishment of our company, we have always adhered to the principle of taking product quality as the foundation, market demand as the guidance, and creating value for customers as our responsibility. We integrate members and partners of different backgrounds, support each other and work together, thus constitute a solid foundation for our career development. Integrity-based requires us to abide by the way of success, to defend the bottom line of personality, to abide by the red line of the law, and to be truthful and pragmatic.

  NSV Tilting disc double flange check valves, as check valve is opened when flow goes through one direction and closes at backflow

Thanks to the fast closure of this versatile valve, pump protection is one of its main applications. It is used for gases and liquids, bus it is not recommended when there are solids in suspension. The head drop is relatively low.

• Applicable Standard
  Design per.API594
  Face to face per API594
  Flange ends dimension ANSI B 16.5/ANSI B 16.47
  Final inspection tests to API598.

• Products Range
  Size: 2" ~ 20" (DN50 ~ DN500)
  Rating: ANSI 150lb-2500lb 
  Body Materials: Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel
  Trim: Per API 600

• Design Features:
  Quick closing system

  Stability at low and pulsating flow
  Moderate pressure drop

  Tight sealing of metal seat

  Seat contacts don’t occur until the disc is seated and closed

Structure Performance:
Tilting disc valves are designed with three eccentricities: 

• First eccentricity: it is the offset between the shaft and the seat plane. This eccentricity removes any interference of the seat with the shaft and therefore the seat has an integral and continuous construction both in the body and disc, and potential leakage can be avoided.

• Second eccentricity: it is the offset between the shaft and the disc diameter. This eccentricity works when reverse comes or normal flow pressure is so low than it can't make enough force to hold the closing torque caused by the weight of the disc.

• Third eccentricity: it is the angle of tilting of the seat plane with the normal plane of the pipe. This tilting reduce the stroke of the disc, therefore it could close faster at backflow.

Furthermore of geometry and weight of the disc, in same cases other elements can optimize the closing sequence. Springs can be used in order to increase the speed of the disc closure before reverse flow starts. In the other side, when reverse flow is a reality but the valve still not close at all a slow closure can avoid slam over the valve. There are several oleo-hydraulic damper systems.

In order to tighten the valve, springs and also counterweights assemble at the end of the shaft can be used.

Minimum work pressure provided by manufacturers should be take into account when selecting valves for low pressure applications, if not disc can be buffeted and in constant motion between the seat and partially open. This leads to seat damage and shaft wear. This effect is more important in swing check valves.

FAQ

1. Q:Do you have any valve in stock?

   A:There have a lot of GGC valves(2”&within) in stock,and that can delivery within one week.

2. Q:Do you have customized valve?

A:Yes,we can supply customized valves.

3. Q: What kinds of valves do you manufacture?

A: We usually manufacture valves made of various materials such as cast Iron/ carbon steel,stainless steel,Alloy steel and industrial valves such as ball, gate, globe, check, bellows seal and ETC. For detail information, please refer to "Download>E-Catalog” of homepage.

4. Q:What's the packing for shipping?

  A:Its carton for small valves(sample) and plywood case(don’t to fumigate).

5.Q: How about delivery schedule?

A: Delivery schedule depends on product type. Therefore, please consult with sales team for specific delivery schedule when you inquire quote. The company is making an effort to keep the delivery schedule, which is the promise with customer. The company will improve your satisfaction degree by delivering the necessary product as soon as possible.

'Honest and trustworthy, seeking truth from facts' is our company's ethical philosophy. In the tide of market economy, our company has always adhered to the business philosophy of ensuring quality, mutual benefit and win-win, and providing customers with high-quality Flanged Butterfly Check Valve Bs5155. We try our best to pursue perfection from product raw materials to production, testing, process and structure, as a guarantee of product quality and high grade, so as to meet the evolving market demand. We strictly operate every proceduress in the production process, aiming to provide you with reliable products and quality services.