Ductile Iron/Cast Iron Pn16 Tilting Disc Wafer Check Valve

We are a professional Cast Gate Valves, C95800 Butterfly Valve, Flanged Fully Welded Ball Valve manufacturer integrating development, design, production and sales, and our products reflect the characteristics of the times. We strive to create a working atmosphere of learning, innovation, harmony and openness, with the goal of driving the industry, improving employees, and benefiting society. In the face of the information industry revolution in the new century, our company always adheres to the quality policy of 'quality is with me, customers are in my heart'. Our goal is to contribute to the realization of sustainable development and the company's own goals through corporate social responsibility measures.

  NSV Tilting disc wafer 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:How can I get your company catalog?

A: For your reference, basic catalogue is same as "Download>E-Catalog” of homepage. If you need printed material or request more specific data like PQ material, please contact sales team.

2. Q:Does your company have any agent/distributor with the exception of China?

  A: At present,we have agent in Indonesia,Singapore,Canada,Mexico,Iraq,and welcome contact us if you would like to join us.

3. Q:Does "NSV" valves have supply to any value end user?

  A:Yes,,it just like PETROKIMIA GRESIK in Indonesia, BP Iraq,ESFAHAN MOBARAKEH STEEL In Iran etc.

4. Q: I want to be registered as your agency?

A: Defined inspection and manager’s approval shall be required for being registered as the company’s agency. For specific application method, please consult with sales team. If you are registered as the company’s agency, “Agency Certificate” will be issued.

5. Q:Are you manufacturer or trading company?

  A: We’re manufacturer,but our factory name is not named NSV due to we’re professional in promotion NSV brand with best service,and also have sold to many end user success.

In recent years, our Ductile Iron/Cast Iron Pn16 Tilting Disc Wafer Check Valve is of stable quality, rapidly expanding production and steadily increasing market share. With the ultimate customer experience and equality, innovation, openness and win-win business philosophy, we are committed to the company's long-term development. We will follow the development of Chinese society and technology and respond to market changes through technological innovation.