Wafer Type Short Length Tilting Single Door Check Valve

We are committed to providing customized Dual Plate Wafer Check Valve, Alloy20 Ball Valve, Slurry Knife Gate Valve solutions to global users. With strong company strength, excellent product quality and perfect after-sales service, our products are well-received by domestic and foreign customers. We will continue to improve the company's management level and business quality, and provide users with more complete services and quality products. As a modern and competitive enterprise, our company's products have been highly praised by customers and the industry, and exported to many countries and regions. We welcome customers to call and write to inquire. Safe production, excellent quality and environmental protection are our commitments. Warmly welcome to contact us and become our direct cooperators.

  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.

In order to speed up the pace of our company's development and expand brand awareness, we sincerely hope to establish close cooperation and win-win relations with enterprises and individual groups from all walks of life, and jointly develop the Wafer Type Short Length Tilting Single Door Check Valve market. We are confident that we have been going to have a bright prospect and to be distributed all over the world in the years to come. The most valuable experience that we should use for reference is that we should establish stable cooperative relations with other manufacturers so that achieve complementary advantages, and jointly promote the development of the industry.