Product Specification

Stainless Steel CF8 CF8M Inverted Bucket Steam Trap For Steam Pipeline Use

Product introduction: 

 
The inverted bucket steam trap product inside has a liquid level sensitive component. The opening of the bucket is downward, and the connecting lever of the inverted bucket drives the valve core to open and close the valve. The inverted bucket type drain valve can discharge air, is not afraid of water hammer, and has good anti pollution performance. The subcooling degree is small, the steam leakage rate is less than 3%, the maximum back pressure rate is 75%, there are more connections, and the sensitivity is not as good as that of a free floating ball drain valve. Due to the fact that the inverted bucket drain valve relies on steam buoyancy to close the valve, it is not suitable for use when the working pressure difference is less than 0.1MPA.
When the device is just started, the air and low-temperature condensed water in the pipeline enter the drain valve, and the inverted bucket falls by its own weight. The connecting lever of the inverted bucket drives the valve core to open the valve, and the air and low-temperature condensed water are quickly discharged. When steam enters the inverted bucket, the steam in the bucket generates upward buoyancy, and the upward connecting lever of the inverted bucket drives the valve core to close the valve. There is a small hole on the inverted bucket. When a part of the steam is discharged from the small hole and another part of the steam produces condensed water, the inverted bucket loses buoyancy and sinks downwards by its own weight. The connecting lever of the inverted bucket drives the valve core to open the valve, which works in a cyclic manner and intermittently discharges water.
 

Product component and performance:

Product features:

1. Advantages:
 
- The inverted bucket drain valve can resist high pressure and water hammer. After installing an imported check valve, it can be used in superheated steam systems.
- The failure mode is usually normally open, and applications that require this characteristic are relatively safe, such as steam turbine drainage.
 
2. Disadvantages:
 
- The small hole at the top of the inverted bucket is very small, which slows down the exhaust speed, and the hole cannot be too large, otherwise a large amount of steam will escape through this small hole during normal operation.
- There must be sufficient water inside the valve body to form a water seal above the lower edge of the inverted bucket. If the water seal is lost, steam will be discharged directly through the valve outlet. In applications, such incidents often occur: when the steam pressure suddenly drops, some condensed water inside the valve body will flash into steam, causing the inverted bucket to lose buoyancy and sink. Steam will leak through the outlet until sufficient condensed water enters the drain valve, forming a new water seal to prevent steam leakage and waste.
- If the inverted bucket drain valve is applied to equipment with large pressure fluctuations, a check valve needs to be installed at the inlet in front of the drain valve. Steam and water can flow freely in the direction shown, and due to the action of the check valve, backflow is impossible.
- Higher superheated steam temperatures may also cause the inverted bucket drain valve to lose its water seal. In such conditions, a check valve should also be installed in front of the drain valve. Some inverted bucket drain valves are manufactured with built-in check valves installed as standard.
- The inverted bucket drain valve is exposed to the external environment and may be damaged by freezing if the temperature is below zero degrees Celsius. Like other mechanical drain valves, insulation is required.
- If the environmental conditions are not very harsh, appropriate insulation can solve the problem, but if you can anticipate lower ambient temperatures, consider using other more robust drain valves. If the supervisor is responsible for drainage, a thermal power drain valve will be the preferred choice.