| Model： | ||
| Standard or Nonstandard： | Standard |
|
| Pressure： | HighPressure |
|
| Material： | Casting |
|
| Media： | Water |
| PriceRange： | ||
| Structure： | Check |
China (Mainland)
0
customer reviews
0% positive feedback over the 6 months
Contact：sales
Tel：86-21-62954829
Fax：0086-21-62954830
Payment
9000+
6000+
3000+
1000+When the credit status reflecting a corporate credit situation is quantified as the specific value of credit point, plus the value of credit point accumulated in the course of longtime online trading, it is turned out to be the credit point for this company.
The design of disc check valves allows them to be installed in any position, including vertical pipelines where the fluid flows downwards. And there is a variety of the sizes available for the popular disc check valve. All the available sizes are doing their favors to the industrial employment.
Standard disc check valves are needed in most occasions. But they are not appropriate to be used on applications where there is heavily pulsating flow, such as the application on the outlet of a reciprocating air compressor, as the repeated impact of the disc can lead to failure of the spring retainer and high levels of stress in the spring. At this moment, specifically designed retainers had better be carried out to typically reduce the amount of disc travel, which effectively increases the resistance to flow and therefore increases the pressure drop across the valve.
An oversized disc check valve is produced by continuous valve chatter. It is caused by the fact that when the valve opens, there is a drop in the upstream pressure. And if this pressure drop means that the differential pressure across the valve falls below the required opening pressure, the valve will slam shut. It is certain that the oversized disc check valve should be able to bear the high pressure drop across the valve for any one flow. If the valve fails to meet the specifications, it may be not possible to overcome the effects of chatter by reducing the closing force on the disc. And for the disc check valve under the standard size, excessive pressure drop across the valve would in an extreme, even prevent flow. No matter what, the size of the disc check valve should be moderately regulated and manufactured. In words, the disc check valve with a variety of the size are doing help all the time.
The pressure difference is significant during the operation of the disc check valve. The differential pressure required to open the check valve is mainly determined by the type of spring used. Generally speaking, the standard spring is widely applied during the practical employment. And there are other several spring options available for some specified types of the disc check valve. Thus, the various types of the disc check valve cooperate to be proper for the various working conditions, aiming to make contributions to the industrial development.
The type with no spring is commonly used where the differential pressure across the valve is small. And the type with the nimonic spring is generally used in high temperature applications. Besides, the heavy-duty spring would increases the required opening pressure for the valve. Thus, it is usually installed in the boiler feedwater line in order to prevent steam boilers from flooding when they are unpressurised.
Generally speaking, the disc check valves are smaller and lighter than lift and standard swing check valves, as well as the less cost. The size of a disc check valve is however limited to DN125. Therefore, the design becomes complicated. Typically, such a design would include a cone shaped disc and a small diameter spring that is retained and guided along the centre line of the cone, which is more difficult and expensive to manufacture. Even then, such designs are still limited in size to DN250.
India
Malaysia
Turkey
Korea
Japan
Brazil
Vietnam